[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "1.1"]
[White "Predke, Alexandr"]
[Black "Fedoseev, Vladimir"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2690"]
[BlackElo "2687"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,110,22,-6,20,14,25,17,41,43,30,22,68,54,49,49,34,29,81,-65,57,-4,-3,-31,-20,-24,-29,-27,-22,-28,0,-19,-16,-75,-22,-91,-30,-52,-46,-44,-31,-25,0,-11,0,0,18,0,0,-86,-74,-75,-17,0,-6,-74,-77,-86,-86,-141,-131,-137,-115,-190,-188,-233,-211,-236,-239,-283,-279,-282,-200,-226,-245,-238,-232,-322,-324,-448,-394,-605,-590,-594,-565,-612,-592,-575,-585,-800,-799,-776,-626,-1015,-999,-860,-807,-1004,-988,-1141,-1141,-1133,-902]} 1. d4 Nf6 2. Nf3 g6 3. Nbd2 d5 4. e3 Bg7 5. Be2 O-O 6. O-O a5 $5 {[%cal Ba7a5,Ba5a4][%mdl 4] Leaves trodden paths. D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} (6... c5 $5) 7. c4 a4 {[#]} 8. cxd5 $146 ({Predecessor:} 8. b4 axb3 9. Nxb3 b6 10. Bb2 Ba6 11. Qc2 Nc6 12. Rfc1 Ra7 13. a3 dxc4 14. Bxc4 {1-0 (77) Gorodetzky,D (2447)-Pultinevicius,P (2434) Riga 2019}) 8... Nxd5 {The position is equal.} 9. Nc4 Bf5 10. Bd2 c5 11. dxc5 a3 12. bxa3 Bxa1 13. Qxa1 Nc6 (13... Nd7 $11) 14. Nd4 {[#]} ({White should try} 14. Rd1 $16) 14... Nxd4 ({Black should play} 14... Nf4 $1 $15 15. Bf3 Bd3) 15. Qxd4 (15. exd4 $14 Bd7 16. Qb2) 15... Nf6 $11 16. Qb2 Bd3 17. Bb4 {Threatens to win with Rd1.} Bxe2 18. Qxe2 Qc7 19. e4 Rfd8 20. f3 Nd7 21. Qe3 (21. Qf2 $11) 21... Ra6 (21... Rdc8 $17 {[%cal Rd7c5]} 22. Qd2 Nxc5) 22. Qg5 {[#]} (22. Qf2 $11) 22... Nf8 (22... Nxc5 $1 $17 {And now ...Ne6 would win.} 23. Ne3 (23. Bxc5 f6 $17) (23. Qxc5 Qxc5+ 24. Bxc5 Rc8 $15) (23. Qxc5 Qxc5+) 23... Nd3 24. Qxe7 Qb6) 23. Ne3 {Black must now prevent Nd5.} Ne6 {[%mdl 1024] Black has compensation.} 24. Qh4 {White wants to play Nd5.} Qf4 ({Much worse is} 24... Nxc5 $6 25. Nd5 $16) 25. Qf2 {Threatening Nd5.} Nc7 26. Re1 h5 27. h3 Rd7 28. Qb2 Qg5 29. Nc4 {[#]} (29. Kh1 $11 {keeps the balance.}) 29... Ne6 $1 $17 30. Nb6 Rd8 (30... Rd3 $17 {Hoping for ...Rxf3.} 31. Qf2 Nd4) 31. Nd5 $11 Nf4 32. Nxf4 (32. c6 $1 $11 {remains equal.} Nxd5 33. exd5 bxc6 34. Bxe7) 32... Qxf4 $17 {White is now going downhill.} 33. Qf2 Qe5 34. f4 (34. Qe3 $142) 34... Qd4 35. f5 e5 36. Qxd4 (36. Re3 $17) 36... Rxd4 {[%mdl 4096] Endgame KRR-KRB} ({Don't take} 36... exd4 37. Kf2 $17) 37. g4 Rd3 38. Kg2 h4 39. Re2 Kg7 40. Rf2 g5 41. Rf3 Rd4 42. Re3 f6 43. Kf3 Ra8 44. Rc3 Rad8 45. c6 {[#]} (45. Rb3 $142 Rc4 46. Kf2) 45... bxc6 $1 $19 {Black is clearly winning.} 46. Rxc6 R8d7 47. Ke2 Rxe4+ 48. Kf2 Red4 49. Re6 Kf7 50. Ke2 Re4+ 51. Kf3 Rc4 52. Ke3 Rc2 53. Rb6 Rh2 54. Bd6 Rxh3+ 55. Ke4 Rh2 {Weighted Error Value: White=0.50/Black=0.20} 0-1

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "1.2"]
[White "Sjugirov, Sanan"]
[Black "Sarana, Alexey"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "2663"]
[BlackElo "2649"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,80,0,11,-16,-20,-16,20,14,10,13,27,4,31,0,0,0,4,0,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-58,-66,-348,-258,-1810,-1787,-12833,-12833,-12836,-12837,-12837,-12837,-12838,-12838,-12839,-12839,-12841,-12839,-12840,-12840]} 1. e4 c5 2. Nc3 d6 3. f4 g6 4. d4 cxd4 5. Qxd4 Nf6 6. e5 {[#] B23: Closed Sicilian: Lines without g3.} Nc6 $1 7. Bb5 dxe5 {has lost popularity (7...Nd7).} 8. Qxd8+ {The position is equal.} Kxd8 9. Nf3 e4 {[#]} 10. Ne5 $146 ({Predecessor:} 10. Ng5 Ke8 11. Bc4 e6 12. Bd2 Bb4 13. O-O-O h6 14. Ngxe4 Nxe4 15. Nxe4 Bxd2+ 16. Rxd2 {1-0 (37) Gallagher,J (2444)-Ochsner,B (2405) Reykjavik 2015}) 10... Be6 11. Nxc6+ bxc6 12. Bxc6 Rc8 13. Bb5 Nd5 14. Nxd5 Bxd5 15. c3 e6 16. Be3 Bc5 17. Kf2 Ke7 18. Rhd1 Rc7 19. c4 Bxe3+ 20. Kxe3 Bxc4 21. Rac1 $1 {[%cal Rc1c4]} Rhc8 22. Rxc4 Rxc4 $11 {[%mdl 4096] Endgame KRR-KRB} 23. Rd7+ {[%mdl 64] [#] Double Attack} Kf6 {aiming for ...Rb4.} 24. Bxc4 Rxc4 25. Rxa7 {KR-KR} Rc2 26. Rb7 Rxg2 27. a4 {Threatens to win with a5.} Rxh2 28. a5 {a6 is the strong threat.} Rh1 29. Kxe4 Ra1 30. b4 Ra3 31. Rb8 ({White should play} 31. Kd4 $11) 31... h5 $15 32. Rd8 $2 {[%mdl 8192] White does not recover from this.} (32. Kd4 $1 $15) 32... h4 $19 33. Rh8 $2 (33. Kd4) 33... Rb3 {Black is clearly winning.} 34. Rb8 h3 35. a6 h2 36. Rh8 Rxb4+ 37. Kf3 Ra4 38. Rxh2 Rxa6 39. Kg4 Ra5 40. Re2 g5 {Weighted Error Value: White=0.56/Black=0.02} 0-1

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "1.3"]
[White "Paravyan, David"]
[Black "Bartel, Mateusz"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "2647"]
[BlackElo "2638"]
[Annotator "TA"]
[PlyCount "44"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,44,33,45,27,38,27,35,0,-6,-58,-50,-76,-45,-98,-90,-93,-89,-118,-126,-262,-222,-280,-223,-375,-357,-1087,-1023,-29987,-29988,-29990,-1254,-1233,-1245,-1251,-1243,-1167,-1167]} 1. d4 g6 2. e4 Bg7 3. Nc3 d6 4. h4 Nc6 5. d5 Ne5 6. h5 {B06: Modern Defence.} gxh5 7. Qxh5 {[#]} Nf6 $146 ({Predecessor:} 7... Bg4 8. Qh4 h5 9. f3 Ng6 10. Qf2 Bd7 11. Bd2 c5 12. dxc6 bxc6 13. Nge2 c5 {1-0 (29) Weitzer,S (2293)-Gladilow,M Germany 2010}) 8. Qh4 {White is slightly better.} c6 9. Bh6 (9. dxc6 $11 bxc6 10. Qg5) 9... Bxh6 $15 10. Qxh6 Qb6 11. Rb1 (11. b3 $15) 11... cxd5 $17 12. exd5 Bf5 13. Bb5+ Kd8 14. Ba4 (14. Nf3 $17) 14... Rc8 $40 {[%mdl 128] [#] White must now prevent ...Rxc3! Black wants a kill.} 15. Nge2 Rc4 16. f3 $2 (16. Bb3 {might work better.} Rg4 17. Ng3) 16... Rg8 $19 17. Rh2 $2 {[#]} (17. Rf1 Rxa4 {[%mdl 64] Decoy} 18. Nxa4 Qb4+ 19. Nac3 Bxc2 20. Rc1 Qxb2 21. Rf2 Nd3+ {[%mdl 64] Double Attack} 22. Kf1) 17... Rxc3 $1 {[%mdl 576] Deflection} 18. Nxc3 (18. bxc3 Qxb1+) 18... Qg1+ {[%mdl 64] Double Attack} 19. Kd2 Nc4+ (19... Rxg2+ $142 20. Rxg2 Nxf3+ 21. Ke2 Qxg2+ 22. Ke3 Ng4+ {[%mdl 64] Double Attack} 23. Kf4 Qd2+ 24. Kg3 Qf2+ 25. Kf4 Nfe5+ 26. Kg5 Qe3+ 27. Kh4 Qxh6+ 28. Kg3 Qh2#) 20. Ke2 {Black is clearly winning.} Rxg2+ 21. Rxg2 Qxg2+ 22. Ke1 Nd7 {White got outplayed after the opening.  Weighted Error Value: White=0.97/Black=0.43} 0-1

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "1.4"]
[White "Khairullin, Ildar"]
[Black "Chigaev, Maksim"]
[Result "1/2-1/2"]
[ECO "E68"]
[WhiteElo "2615"]
[BlackElo "2631"]
[Annotator "TA"]
[PlyCount "42"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,42,58,12,29,8,4,-28,-14,-16,-20,-12,-14,-16,0,0,-20,-16,-6,-46,-41,-42,-33]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 7. O-O e5 8. e4 exd4 9. Nxd4 Re8 10. h3 a6 11. Re1 Rb8 12. Bf4 Ne5 {E68: King's Indian: Fianchetto: 6...Nbd7 7 0-0 e5 8 e4.} 13. b3 c5 14. Nc2 b5 {[#] Black has an edge.} 15. Ne3 $146 ({Predecessor:} 15. Bxe5 Rxe5 16. Qd3 bxc4 17. bxc4 Re8 18. Rab1 Be6 19. Rxb8 Qxb8 20. Rb1 Qc7 21. Nd5 Nxd5 22. cxd5 {1-0 (89) Almada,E (2371)-Maier,C (2394) Switzerland 2001}) 15... Nh5 16. Bxe5 Bxe5 17. Rc1 Be6 18. Qd3 {[%cal Rc4b5]} Qa5 19. Re2 Nf6 20. Ncd5 Nxd5 21. Nxd5 Bd4 {Weighted Error Value: White=0.15/Black=0.04} 1/2-1/2

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "1.5"]
[White "Drygalov, Andrey"]
[Black "Dragun, Kamil"]
[Result "1/2-1/2"]
[ECO "B13"]
[WhiteElo "2493"]
[BlackElo "2569"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,73,4,12,1,2,2,0,0,12,4,13,6,21,23,23,12,20,0,0,0,37,32,41,10,14,0,0,0,0,0,0,0,44,47,102,98,116,96,95,95,95,95,95,95,88,83,218,0,0,-1,0,-4]} 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 g6 6. Bf4 Bf5 7. Nf3 Bxd3 8. Qxd3 Bg7 9. O-O Nf6 10. Re1 O-O 11. Nbd2 e6 12. h3 Rc8 13. Ne5 {B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack.} Nxe5 14. Bxe5 Nd7 15. Bxg7 Kxg7 {[#]} 16. Nf3 $146 ({Predecessor:} 16. f4 Qc7 17. Rf1 Nb6 18. g4 Nc4 19. Nxc4 Qxc4 20. Qe3 Rfe8 21. Qg3 Qc7 22. Qf2 {1-0 (40) Singh,E (1647)-Chong,K (1351) Hong Kong 2016}) 16... Qb6 (16... Nf6 {with more complications.} 17. Ne5 h5 18. a4 a5 19. Rac1 Nd7) 17. Re2 Qa6 (17... Nf6 {keeps more tension.} 18. Qe3 Qc7 19. Ne5 h5 20. h4 Ne4) 18. Qxa6 bxa6 19. Rc1 a5 20. b3 Rc7 21. c4 dxc4 22. bxc4 Rb8 23. Re3 Rb4 24. c5 Nb8 25. a3 Ra4 26. Rd1 Rd7 27. Rc1 Nc6 28. Ne5 Nxe5 (28... Rc7 $1 $14) 29. dxe5 $14 {[%mdl 4096] Endgame KRR-KRR} Rad4 30. Rec3 R4d5 31. c6 Rc7 32. Rc5 f6 33. Rxd5 exd5 34. Rc5 d4 {[#]} (34... fxe5 $16 {was worth a try.} 35. Rxd5 Kf6) 35. Rxa5 $2 (35. f4 $1 $18) 35... fxe5 $11 36. Rxe5 Rxc6 37. Rd5 {Weighted Error Value: White=0.26/Black=0.14} 1/2-1/2

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "1.6"]
[White "Belous, Vladimir"]
[Black "Drygalov, Sergey"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "2524"]
[BlackElo "2490"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,71,20,27,5,35,10,8,-13,0,-35,-17,-32,11,10,13,12,10,-9,0,-23,0,-66,-63,-74,-44,-56,0,-20,8,14,60,67,53,0,92,64,78,41,52,-22,-14,-283,-269,-859,-843,-29988,-29989,-29989,-29990,-29990,-29991,-29991,-29992,-29992,-29993,-29996,-29997,-29997,-29998,-29998,-29999,-29999]} 1. c4 Nf6 2. Nf3 c6 3. d4 d5 4. e3 Bg4 5. Nc3 e6 6. h3 Bh5 7. cxd5 {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4.} exd5 8. Bd3 Bd6 9. O-O {The position is equal.} O-O {[#]} 10. Ne2 $146 ({Predecessor:} 10. e4 dxe4 11. Nxe4 Nxe4 12. Bxe4 Re8 13. Qd3 h6 14. Be3 Qe7 15. Nd2 Nd7 16. Bf3 {0-1 (38) Quenehen,N (1322)-Redjem,M (1777) Europe Chess INT 2020}) 10... Nbd7 11. Nf4 Bxf4 12. exf4 Bxf3 13. Qxf3 Re8 14. g4 Qb6 15. Qd1 Ne4 16. f3 (16. Be3 $11) 16... Nd6 $15 17. Kg2 Kh8 18. Bc2 Nb5 (18... Nf8 {looks sharper.} 19. Qd3 Re7 20. f5 Rae8 21. Bf4 Nc4) 19. Qd3 $1 {[%csl Gc2][%cal Rd3h7] [#]} Nf8 (19... Nf6 {with more complications.} 20. Be3 Rxe3 21. Qxe3 Nxd4 22. Qc3 Ne6) 20. Be3 Rxe3 21. Qxe3 Nxd4 22. Rf2 (22. Bb3 $14) 22... c5 (22... Qxb2 $11 {remains equal.} 23. Rc1 Qb6) 23. Rd1 Qc6 24. b4 {Hoping for bxc5.} Re8 25. Qc3 ({White should try} 25. Qc1 $1 $14) 25... Nfe6 $11 {[%cal Bf8e6,Be6f4,Bf4h3][%mdl 32]} 26. Kf1 $2 {[%mdl 8192] Loses the game.} (26. Qe3 $11 {and White is okay.}) 26... Nxf4 $19 {White must now prevent ...Qa6+.} 27. Qxc5 $2 {[#]} (27. Rxd4 cxd4 28. Qxc6 bxc6 29. Rd2) 27... Qh6 $1 28. Kg1 (28. Qxd4 Qxh3+) 28... Nxh3+ {[%mdl 64] Double Attack. Black mates.} 29. Kg2 Nf4+ 30. Kg3 Nde2+ 31. Rxe2 Nxe2+ 32. Kg2 Nf4+ 33. Kg3 Qh3+ 34. Kxf4 Qh2+ 35. Kg5 h6+ 36. Kf5 Qe5# {Weighted Error Value: White=0.64/Black=0.15} 0-1

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "2.1"]
[White "Fedoseev, Vladimir"]
[Black "Predke, Alexandr"]
[Result "0-1"]
[ECO "D20"]
[WhiteElo "2687"]
[BlackElo "2690"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,80,32,29,73,44,26,9,20,9,10,11,10,12,12,0,0,0,0,-75,-94,-91,32,21,30,29,20,26,18,28,35,0,0,0,0,0,48,-418,-418,-458,0,0,0,-8,-8,-103,0,0,0,-31,-28,-73,-18,-39,0,-45,-45,-29987,-29988,-29988,-29988,-29988,-29989,-29993,-29994]} 1. d4 d5 2. c4 dxc4 3. e4 Nf6 4. e5 Nd5 5. Bxc4 Nc6 {[%cal Bb8c6,Bc6b4,Bb4d3][%mdl 32]} 6. Ne2 Bf5 7. O-O e6 8. Nbc3 Nb6 9. Bb3 Be7 10. Be3 Nb4 {D20: Queen's Gambit Accepted: 3 e3 and 3 e4.} 11. Nf4 c6 {[#]} 12. Qf3 $146 ({Predecessor:} 12. a3 N4d5 13. Ncxd5 cxd5 14. Rc1 O-O 15. g4 Bg6 16. Nxg6 fxg6 17. f4 Qd7 18. Qd3 {½-½ (35) De Haan,E (2331)-Guliyev,N (2532) Liffre 2018}) 12... O-O {The position is equal.} 13. Rac1 Nd3 14. Nxd3 Bxd3 15. Rfd1 Bg6 16. g3 a5 17. h4 a4 18. Nxa4 Nxa4 $17 19. h5 Nxb2 (19... Bf5 $17 20. Bxa4 Rxa4) 20. hxg6 $14 fxg6 (20... Nxd1 $6 21. gxf7+ Rxf7 22. Bxe6 $18) 21. Bxe6+ Kh8 22. Qg4 {Rd2 is the strong threat.} Nxd1 23. Rxd1 g5 24. d5 cxd5 25. Rxd5 Qe8 26. Rd7 Ra5 27. Bxg5 $2 {[%mdl 8192] [#]} (27. Bd5 $14 {stays ahead.}) 27... h5 $1 $19 {[%cal Rh5g4]} 28. Qh4 (28. Rxe7 hxg4) 28... Bc5 (28... Rxe5 $19 29. Bxe7 (29. Rxe7 {leads to mate.} Re1+ 30. Kg2 Qc6+ {[%mdl 64] Double Attack} 31. Bd5 Qxd5+ {[%mdl 64] Double Attack} 32. Re4 Rxe4 33. Qxh5+ Kg8 34. Kf1 Qd3+ 35. Kg2 Re1 36. Bf4 Qf1+ 37. Kf3 Qe2+ {[%mdl 64] Double Attack} 38. Kg2 Qxh5 39. f3 Qh1+ 40. Kf2 Qg1#) 29... Rxe6 30. Bxf8 Qxd7 31. Qxh5+ Rh6) 29. Be7 $11 Bxe7 ({Not} 29... Bxf2+ $2 30. Kh2 $18) 30. Rxe7 {Qg5 would kill now.} Qg6 31. Bb3 (31. Bf7 $11 Qf5 32. Qxh5+ Qxh5 33. Bxh5) 31... Qf5 (31... Rc5 $1 $17 {[%cal Rc5c1] ( -> ...Rc1+)} 32. Qd4 Rc1+ 33. Kg2 Qf5) 32. Qd4 Qg5 $36 {[%mdl 2048] Black has the initiative.} 33. Qd6 {Black must now prevent Rf7.} Ra6 34. Qd7 {[#]} h4 (34... Raa8 $1 $17 {Threatening ...Rad8.} 35. Qh3 Rf5) 35. Rf7 Rd8 36. Qh3 {And now e6 would win.} Rh6 37. e6 $2 {[%mdl 8192]} (37. Qf5 $15 Qxf5 38. Rxf5) 37... hxg3 {Black mates.} 38. e7 gxf2+ 39. Kxf2 Rxh3 40. Rf8+ {[#]} Kh7 $1 {Weighted Error Value: White=0.64/Black=0.36} ({But not} 40... Rxf8+ $2 41. exf8=Q+ Kh7 42. Qg8+ Kh6 43. Qh8+ Kg6 44. Qxh3 $18) 0-1

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "2.2"]
[White "Sarana, Alexey"]
[Black "Sjugirov, Sanan"]
[Result "1-0"]
[ECO "C89"]
[WhiteElo "2649"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,97,41,24,27,18,31,27,33,41,52,53,73,73,89,45,47,31,48,40,48,25,52,28,29,43,37,39,27,32,57,53,62,64,82,54,124,118,125,119,128,141,131,129,122,73,73,73,73,73,81,73,80,73,80,73,85,81,81,71,88,88,240,219,403,406,543,538,514,504,751,666,746,710]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d3 Bd6 13. Re1 Bf5 {13...Bf5 is better than 13...Qh4.} 14. Qf3 Qf6 {C89: Closed Ruy Lopez: Marshall Attack.} 15. Be3 $5 {[%mdl 4] [#] A promising side line.} Qg6 $146 ({Predecessor:} 15... Qe5 16. g3 Bxd3 17. Bd2 Qf5 18. Qxf5 Bxf5 19. Bxd5 cxd5 20. Be3 a5 21. Rd1 Be6 22. a3 {½-½ (74) Lorenzo de la Riva,L (2355)-Harutyunian,T (2485) Barcelona 2016}) 16. Bxd5 cxd5 {White has an edge.} 17. Nd2 Rad8 {[%cal Ba8d8,Bd8d6,Bd6e6][%mdl 32]} 18. Bf4 Bxd3 19. Bxd6 Rxd6 20. Qf4 Re6 21. Re3 Be4 {[%csl Ge4][%cal Rg6g2] [#]} 22. f3 Bf5 {White should prevent ...Bh3.} 23. Rae1 Bh3 {[%csl Gh3][%cal Rg6g2]} 24. Qg3 (24. R1e2 {with more complications.} h6 25. Nf1 Rc6 26. Rd2 Bc8 27. Qd4) 24... Rxe3 25. Rxe3 {Black must now prevent Qxg6.} Qc2 26. Qf2 Be6 27. Nf1 Qa4 28. a3 a5 29. Rd3 h6 30. Ne3 Qb3 (30... Qf4 $14) 31. Qd2 $16 Qa2 32. Nxd5 Bxd5 33. Rxd5 {[%mdl 4096] Endgame KQR-KQR} Qb3 34. Kf2 Re8 35. Rd8 Rxd8 36. Qxd8+ {[%mdl 64] [#] Double Attack. KQ-KQ} Kh7 37. Qd2 g6 38. Kg3 Kg7 39. Kf4 Kh7 40. h3 Kg7 41. Ke4 Qe6+ 42. Kd3 Qb3 43. Qe2 Kh7 $2 {Loses the game.} (43... Qc4+ $16 44. Kd2 Kf6) 44. Kd4 $18 b4 $2 (44... Qa4+ 45. Kc5 Kg7) 45. axb4 axb4 46. c4 {White is clearly winning.} Qa4 47. c5 b3+ 48. Qc4 Qd7+ 49. Kc3 {Weighted Error Value: White=0.06/Black=0.25} 1-0

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "2.3"]
[White "Bartel, Mateusz"]
[Black "Paravyan, David"]
[Result "0-1"]
[ECO "A07"]
[WhiteElo "2638"]
[BlackElo "2647"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,112,-5,-35,0,-7,-1,-18,-18,-17,-27,-18,-22,-20,0,0,0,0,0,-53,-59,-64,-56,-56,-56,-56,-59,-69,-66,-72,-65,-57,-33,-79,-78,-78,-79,-84,-77,-64,0,-65,0,-68,0,0,0,0,0,0,0,0,0,0,0,-22,0,0,0,-20,-22,-29,-58,-217,0,0,0,0,0,0,0,0,0,0,0,0,0,-29980,0,0,0,0,0,0,0,0,0,-616,-606,-29964,-29964,-29967,-29966,-29956,-29953,-29959,-29958,-12845,-5708,-29974,-29975,-29975,-29976,-29976,-29976]} 1. g3 d5 2. Bg2 e5 3. d3 Nf6 4. Nf3 Nc6 5. O-O Be7 6. Nc3 O-O $1 {6...0-0 is better than 6...d4. A07: Réti Opening: New York and Capablanca Systems.} (6... d4 $5 {[%cal Rd4c3]} 7. Ne4 Bg4 $11) 7. e4 dxe4 8. Nxe4 Nxe4 {The position is equal.} 9. dxe4 Qxd1 10. Rxd1 Bg4 11. c3 f5 12. h3 Bh5 {[#]} 13. Re1 $146 ({Predecessor:} 13. Rd7 Rad8 14. Rxd8 Rxd8 15. exf5 Rd1+ 16. Kh2 Bc5 17. b4 Bxf2 18. g4 Bf7 19. b5 {0-1 (74) Paravyan,D (2435)-Predke,A (2537) Moscow 2015}) 13... fxe4 14. Nd2 {[#]} (14. Nh2 $11) 14... Rxf2 $1 $15 15. g4 {[#]} (15. b4 Re2) 15... Bh4 16. gxh5 {[#]} Rxg2+ $1 {[%mdl 64] Discovered Attack} 17. Kxg2 Bxe1 18. Nxe4 Bh4 19. Be3 b6 20. Kf3 Rd8 21. Ke2 Ne7 22. a4 Nd5 (22... h6 {keeps more tension.} 23. Rf1 Rf8 24. Rg1 Nf5 25. Rd1 Be7) 23. a5 Nxe3 24. Kxe3 $17 {[%mdl 4096] Endgame KRB-KRN} b5 ({Better is} 24... Kf7 $15) 25. Nc5 (25. b4 $11) 25... Kf7 (25... Be7 $15 26. Nd3 Rd6) 26. a6 (26. Rf1+ $11 Bf6 27. Nd3) 26... c6 (26... Bg5+ $15 27. Ke4 Rd2 28. Rf1+ Bf4) 27. Nd3 $11 Ke6 28. Ke4 Bf6 29. Rf1 Rd5 30. b4 h6 31. Rf3 Kd6 32. Nc5 Kc7 33. Rg3 Kb6 34. Ne6 Rd1 35. Nxg7 Re1+ 36. Kd3 $2 (36. Kf5 $15 Rf1+ 37. Kg6) 36... Bxg7 $2 ({Stronger than} 36... Kxa6 37. Ne6 $11) ({Black should play} 36... e4+ $19 37. Kd2 Rf1) 37. Rxg7 $19 {KR-KR} Rh1 38. Rg3 Kxa6 39. Ke4 Kb6 40. Kxe5 {Black must now prevent Kf6.} Rf1 41. Ke4 a5 42. bxa5+ Kxa5 43. Rg5 $2 {[%mdl 8192]} Rf2 $2 (43... hxg5 {mates} 44. Ke3 Rf4 45. Ke2 Rh4 46. Kf3 Rxh5 47. Kg3 Rh4 48. Kf3 Rxh3+ 49. Kg4 Rxc3 50. Kxg5 b4 51. Kf6 b3 52. Ke5 b2 53. Kd4 Rc2 54. Ke4 b1=Q 55. Kf4 Rf2+ 56. Ke3 Qe1+ 57. Kd4 Kb4 58. Kd3 Rd2#) 44. Rg6 $11 c5 45. Rxh6 Rh2 46. Rh8 {Threatens to win with h6.} Ka4 47. Rc8 c4 48. Kd4 $2 {[%mdl 8192]} (48. Kf4 $11) 48... Rxh3 $19 49. Ra8+ Kb3 50. Rb8 Rh4+ 51. Ke3 Rxh5 52. Kd4 Kc2 53. Rb7 Kd2 (53... Rh4+ $142 54. Ke3 Kxc3 55. Rxb5 Kc2) 54. Rg7 Rh4+ {Black mates.} 55. Kc5 Kxc3 56. Rg3+ Kb2 {Weighted Error Value: White=0.61/Black=0.28} 0-1

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "2.4"]
[White "Chigaev, Maksim"]
[Black "Khairullin, Ildar"]
[Result "1/2-1/2"]
[ECO "B10"]
[WhiteElo "2631"]
[BlackElo "2615"]
[Annotator "TA"]
[PlyCount "40"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,40,-7,0,-6,-2,11,27,22,24,26,27,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,11,5,25,25,25,19,33]} 1. e4 c6 2. Nf3 d5 3. d3 dxe4 4. dxe4 Qxd1+ 5. Kxd1 Nf6 6. Nbd2 {B10: Caro-Kann: 2 d3 and 2 c4.} g6 7. Ne5 Nbd7 8. Nd3 {[#] White has an edge.} a5 $146 ({Predecessor:} 8... Ng4 9. a4 Bg7 10. h3 Nge5 11. Nxe5 Nxe5 12. c3 g5 13. Nc4 h6 14. Nxe5 Bxe5 {½-½ (61) Predke,A (2676)-Wojtaszek,R (2725) Moscow 2019}) 9. a4 h5 10. h4 Ng4 11. Ke1 Bh6 12. Nb3 Bxc1 13. Rxc1 b6 14. Be2 Nge5 15. Nxe5 Nxe5 16. f3 c5 17. Nd2 Bd7 18. b3 O-O-O 19. Nc4 Nxc4 20. Bxc4 e6 {Not much happened in this game.  Weighted Error Value: White=0.03/Black=0.04} 1/2-1/2

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "2.5"]
[White "Dragun, Kamil"]
[Black "Drygalov, Andrey"]
[Result "1/2-1/2"]
[ECO "E36"]
[WhiteElo "2569"]
[BlackElo "2493"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,71,9,0,8,18,0,0,-58,-52,-58,0,-50,10,-70,0,0,0,0,0,0,0,0,0,0,0,10,10,10,7,0,0,-4,-6,-55,-58,-133,-143,-141,-128,-145,-133,-135,-134,-138,-138,-137,-138,-130,-132,-144,-125,-131,0,-133,-122,-133,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 O-O 7. Nf3 dxc4 8. Qxc4 b6 9. Bg5 {E36: Nimzo-Indian: Classical: 4...d5 5 a3.} Bb7 10. Rc1 h6 11. Qxc7 (11. Bf4 $11) 11... Qxc7 $15 12. Rxc7 hxg5 13. Rxb7 Nc6 {[#]} (13... Rc8 $15 14. e3 (14. Nxg5 Nc6 $15) 14... Ne4) 14. Ne5 $146 (14. Rc7 $1 $11 Rac8 15. Rxc8 Rxc8 16. e3) ({Predecessor:} 14. Rc7 Rac8 15. Rxc8 Rxc8 16. e3 g4 17. Nd2 e5 18. Ba6 Rc7 19. dxe5 Nxe5 20. Kd1 {0-1 (52) Goudriaan,E (2239)-Law,N (2151) Haarlem 2010}) 14... Na5 (14... Rfc8 $1 $15 15. Nxc6 (15. Nxf7 $2 Na5 $19) 15... Rxc6) 15. Rc7 $11 Rac8 16. Rxc8 Rxc8 17. Nd3 Nb3 18. e3 Rc2 19. Be2 Nc1 {[#] aiming for ...Nxd3+.} 20. Kd1 Rxe2 21. Kxc1 {[%mdl 4096] Endgame And now Kd1 would win. KRN-KRN} Ne4 22. Rf1 f6 23. h3 Kf8 24. g4 Ke7 25. Rh1 ({White should try} 25. Re1 $15 Rxe1+ 26. Nxe1) 25... Nxf2 $17 26. Nxf2 Rxf2 {KR-KR} 27. h4 gxh4 28. Rxh4 Re2 29. Rh3 a5 30. a4 Rg2 31. Rh8 Kd7 (31... Rxg4 32. Rb8 $15) 32. Rb8 Kc7 (32... Rxg4 $6 33. Rxb6 Rg3 34. Kd2 $11) 33. Re8 Kd7 ({Of course not} 33... Rxg4 $6 34. Rxe6 Rg2 35. b3 $11) 34. Rb8 Kc6 ({Much weaker is} 34... Rxg4 $6 35. Rxb6 Rg3 36. Kd2 $11) 35. Re8 Kd7 ({Don't play} 35... Rxg4 $6 36. Rxe6+ Kd5 37. Rxb6 $11) (35... Kd5 $17 36. b3 Re2 37. Rd8+ Kc6 38. Rc8+ Kd7) 36. Rb8 {Weighted Error Value: White=0.17/Black=0.16} 1/2-1/2

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "2.6"]
[White "Drygalov, Sergey"]
[Black "Belous, Vladimir"]
[Result "0-1"]
[ECO "B51"]
[WhiteElo "2490"]
[BlackElo "2524"]
[Annotator "TA"]
[PlyCount "126"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,126,38,34,31,12,20,24,13,14,41,45,37,48,50,41,83,41,26,31,40,0,16,-1,2,-44,-18,-90,-98,-133,-123,-156,-68,-112,-94,-91,-84,-100,-31,-45,0,0,0,0,0,0,9,7,14,8,14,0,0,0,0,0,0,0,0,0,22,14,16,0,0,0,0,-49,-61,-77,-70,-191,-184,-182,-162,-181,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,0,0,0,0,0,-8,0,-5981,-4647,-3347,-2612,-29960,-1043,-771,-663,-29966,-29966,-29979,-29981,-29981,-29979,-29979,-29980,-29980,-29981,-29981,-29982,-29982,-29982,-29983,-29983]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 d6 4. O-O Bd7 5. Re1 g6 6. c3 a6 7. Bf1 Bg7 {7...Bg7 has become a bit dusty these days. B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7.} 8. h3 e5 9. Na3 Nge7 {White has an edge.} 10. Nc2 {[#]} f5 $146 ({Predecessor:} 10... O-O 11. d4 cxd4 12. cxd4 Nxd4 13. Ncxd4 exd4 14. Nxd4 Nc6 15. Nf3 Be6 16. Ng5 Bc8 {½-½ (27) Andriasian,Z (2594)-Petrosian,T (2625) Yerevan 2016}) 11. exf5 gxf5 12. d4 cxd4 13. cxd4 e4 {[#]} 14. d5 $1 Ne5 15. Nxe5 Bxe5 16. Bg5 O-O 17. Ne3 b5 18. Rb1 Kh8 19. Nc2 (19. a4 $11) 19... Rg8 $17 20. Qh5 Qf8 21. Nb4 Be8 (21... a5 $17 22. Bxe7 Qxe7) 22. Bxe7 Bxh5 (22... Qxe7 {is interesting.} 23. Qh6 Qf6 24. Qxf6+ Bxf6 25. Nc6 Bg6) 23. Bxf8 Raxf8 24. Nc6 Bf4 ({Better is} 24... Bf6 $17 25. b3 Bc3) 25. Be2 $15 Bf7 26. Ne7 Rg7 27. Nxf5 Rg5 28. Ne3 Rfg8 29. Bf1 Bxe3 30. fxe3 Bxd5 31. b3 Be6 32. Kh2 Rc8 33. Rbd1 Rc6 34. Rd4 d5 35. a4 Rc5 36. axb5 axb5 37. b4 Rc2 38. Re2 Rc3 39. Ra2 Rxe3 40. Bxb5 Kg7 41. Ra6 {[#]} (41. Ba4 $15) 41... Kf6 $1 $19 42. Rd2 Ke5 43. Bc6 Rb3 $2 ({Black should play} 43... Rg8 $19 44. Ra5 Rd8) 44. Bxd5 $1 $11 Bxd5 45. Rxd5+ Kxd5 46. Ra5+ Kd4 {( -> ...Rxa5)} 47. Rxg5 {[%mdl 4096] Endgame KR-KR} e3 {aiming for ...e2.} 48. Kg3 Kd3 ({But not} 48... Rxb4 $2 49. Rg4+ Kc3 50. Rxb4 $18) 49. Kf3 Kd2 ({Reject} 49... Rxb4 $6 50. Rd5+ Kc4 51. Re5 $16) (49... e2 $5 50. Re5 $8 Kd4+ 51. Kf4 Kd3 $11) 50. Re5 $1 Rd3 {Strongly threatening ...Rd7.} 51. b5 Rd8 {White must now prevent ...Rf8+.} 52. h4 $2 {[%mdl 8192]} (52. Rxe3 Rf8+ 53. Kg4 Kxe3 $19) (52. g4 $11) 52... Rf8+ $19 53. Kg4 e2 54. Kg5 Rb8 (54... Rf1 $142 55. Kh6 e1=Q 56. Rxe1 Rxe1 57. Kxh7 Ke3 58. g4 Kf4 59. g5 Re7+ 60. Kh6 Kf5 61. g6 Kf6 62. b6 Rg7 63. Kh5 Kf5 64. b7 Rxb7 65. Kh6 Kf6 66. Kh5 Kf5 67. Kh6 Kf6 68. Kh5 Kf5) 55. Kh6 {[#]} Rxb5 $3 {[%mdl 512]} 56. Re7 (56. Rxb5 e1=Q) 56... Rb3 {Black mates.} 57. Rxe2+ Kxe2 58. Kxh7 {KR-KPP} Rg3 59. h5 Ke3 60. h6 Kf4 61. Kh8 Kf5 62. h7 Kg6 63. Kg8 Kh6+ {Weighted Error Value: White=0.38/Black=0.21} 0-1

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "3.1"]
[White "Predke, Alexandr"]
[Black "Fedoseev, Vladimir"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2690"]
[BlackElo "2687"]
[Annotator "TA"]
[PlyCount "158"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,158,15,23,16,16,16,21,2,47,26,27,31,47,46,36,38,47,35,64,68,50,43,46,14,22,0,0,-43,17,-100,-91,-140,-43,-41,-53,-151,-67,-101,-100,-117,-124,-149,-135,-138,-138,-145,-69,-152,-151,-158,-153,-162,-106,-162,-162,-161,-111,-145,-71,-130,-120,-106,-112,-93,-103,-143,-45,-36,-47,-48,-38,-79,-72,-78,-20,-42,-46,-36,-28,-178,0,0,298,305,289,0,0,0,0,0,0,0,0,0,0,0,0,-120,-122,-166,-173,-181,-58,-188,-177,-181,-166,-168,-77,-71,0,0,0,0,0,0,0,0,0,0,0,0,0,-214,-218,-198,-186,-455,-470,-547,-515,-12122,-12122,-6125,-5304,-1752,-901,-858,-701,-29979,-29980,-29980,-29980,-29984,-29983,-29984,-29985,-29985,-29986,-29986,-29987]} 1. d4 Nf6 2. Nf3 g6 3. Nbd2 d5 4. b3 Bf5 5. Bb2 Nbd7 6. e3 {[#] D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} e6 $146 ({Predecessor:} 6... c6 7. c4 e6 8. Be2 Bd6 9. O-O h5 10. a3 h4 11. Ne5 Qc7 12. Ndf3 Ng4 13. Nxg4 Bxg4 {0-1 (39) Ushenina,A (2416)-Vaishali,R (2393) chess.com INT 2020}) 7. Be2 h5 8. h3 {The position is equal.} h4 9. a3 c6 10. c4 a5 11. O-O Be7 12. Re1 Qb8 13. Ne5 (13. c5 {is more complex.} b5 14. cxb6 Qxb6 15. Qc1 Ne4 16. Nxe4 Bxe4 17. Nd2) 13... Ne4 14. Nxd7 Kxd7 15. cxd5 (15. Bf1 {keeps more tension.} Nxd2 16. Qxd2 Ke8 17. Be2 Kf8 18. b4) 15... exd5 16. Nxe4 (16. Bf3 {is interesting.} Nxd2 17. Qxd2 Bd6 18. Bc3 Qd8 19. b4) 16... Bxe4 17. f3 (17. Qd2 {feels hotter.} g5 18. Rad1 Bd6 19. f3 Bg6 20. e4) 17... Bf5 18. f4 (18. e4 $5 {[%cal Re4f5]} Bxh3 19. gxh3 Qg3+ {[%mdl 64] Double Attack} 20. Kh1 $11) 18... Be6 (18... Bd6 $15) 19. e4 (19. Bd3 $11) 19... Qxf4 $17 ({Reject} 19... dxe4 $6 20. d5 $11) 20. Bf3 Qd6 (20... Qg3 $1 $17 21. exd5 cxd5) 21. exd5 cxd5 22. Bg4 (22. a4 $15) 22... Bxg4 ({Better is} 22... Qg3 $1 $17 {aiming for ...Bd6.} 23. Bxe6+ fxe6) 23. Qxg4+ f5 $1 {[%cal Rf5g4]} 24. Qf3 Bf6 $1 25. Rad1 Rhe8 $1 26. Re5 Bxe5 27. dxe5 Qc5+ (27... Qb6+ $17 28. Kh2 Rad8) 28. Bd4 (28. Kh2 $15 Ke6 29. Qf4) 28... Qc6 ({Not} 28... Qxa3 $2 29. Qxd5+ Kc7 30. Bc5 $18) 29. Qf2 Rac8 30. Qxh4 Qe6 (30... Qc2 $19 31. Re1 Rc6 32. Qh7+ Re7) 31. Qe1 (31. b4 $17) 31... b6 $19 32. Qe2 Rc6 33. Qb5 Ke7 (33... Kc7 $142 $1 34. Qa6 Kb8) 34. Bf2 ({White should play} 34. Be3) 34... Kf7 35. Rxd5 Re7 $1 36. Qd3 {[#]} Rc3 $1 37. Qd4 (37. Qd2 Rc2) 37... Rc5 ({But not} 37... Rxb3 $6 38. Bh4 $11) (37... Rc1+ $1 $17 38. Kh2 Rc5 39. Rxc5 bxc5) 38. Rxc5 $15 bxc5 39. Qxc5 Qxe5 {[%mdl 4096] Endgame KQR-KQB} 40. Qc4+ Re6 41. b4 a4 (41... g5 $17) 42. b5 Qa1+ {[%mdl 64] Double Attack} 43. Kh2 Qxa3 44. b6 (44. Qc7+ $1 $11 Qe7 45. Qc4) 44... Qb3 $2 (44... Qd6+ $1 $19 45. Kg1 Qc6) 45. Qh4 $11 Ke8 $2 {[%mdl 8192]} (45... Rxb6 $11 46. Bxb6 Qxb6 47. Qxa4 Kf6) 46. Qh8+ $18 Kd7 47. Qg7+ $2 (47. Qb8 $1 $18 {[%cal Rb8c7]} Re8 48. Qc7+ Ke6 49. Qc6+ Kf7 50. Bc5) 47... Re7 $11 48. Qd4+ Ke6 49. Bh4 Rf7 50. Qd8 Qb5 (50... f4 {looks sharper.} 51. Qc8+ Kd5 52. Qa8+ Ke5 53. Qe8+ Kd4) 51. Qg8 Qd7 (51... Qe5+ {with more complications.} 52. Bg3 f4 53. Qxg6+ Qf6 54. Qe4+ Qe5) 52. Qxg6+ Kd5 {...Qd6+ is the strong threat.} 53. Qh5 (53. Qg8 $11) 53... Kc6 $1 $17 54. Qf3+ Qd5 $1 {[%cal Rd5f3]} 55. Qc3+ Kxb6 (55... Kb7 $1 $19 56. Bg3 Re7) 56. Qb4+ (56. Bf2+ $15 Kb5 57. Qb2+ Qb3 58. Qe5+ Ka6 59. Qc5 Qb8+ 60. Bg3) 56... Qb5 $19 57. Qd6+ Kb7 58. Bg3 Rd7 (58... Qc6 $1 $19 {[%cal Rc6d6] has better winning chances. And now ...Qxd6 would win.} 59. Qf4 Rd7 60. Qb8+ Ka6) 59. Qb8+ $17 {[#]} Ka6 (59... Kc6 $1 $17 {Strongly threatening ...Qxb8.} 60. Qc8+ Kd5) 60. Qc8+ $11 Rb7 (60... Ka5 {keeps more tension.} 61. Be1+ Kb6 62. Bf2+ Ka5 63. Be1+) 61. Qa8+ Kb6 62. Qd8+ $1 Kc5 63. Qd6+ Kc4 64. Qf4+ Kb3 {Hoping for ...Qd3.} 65. Qe3+ Ka2 {White must now prevent ...Qd5.} 66. Qd2+ $2 (66. Qe6+ $1 $11 {and White is okay.} Qb3 67. Qe2+ Kb1 68. Qf1+ Kc2 69. Qf2+ Kc1 70. Bf4+ Kb1 71. Qf1+ Ka2 72. Qe2+ Qb2 73. Qc4+ {[%mdl 64] Double Attack} Qb3 74. Qe2+ Qb2 75. Qc4+ {[%mdl 64] Double Attack} Qb3 76. Qe2+) 66... Qb2 $19 67. Qd5+ {[#]} Rb3 $1 {Threatens to win with ...Qc3.} 68. Be5 $2 (68. Qxf5 {was necessary.} Qe2 69. Bd6) 68... Qc2 69. Qa5 Rd3 70. h4 (70. Qb6 $142 Rd5 71. Bg7) 70... Rd2 71. Qa8 Qe4 72. Qg8+ Qd5 73. Qg3 a3 74. h5 f4 {Black mates.} 75. Bxf4 Qxh5+ 76. Qh3 Rd5 77. Bc1 Qe5+ 78. Qg3 Qh8+ 79. Kg1 Rd1+ {[%mdl 64] Double Attack. A wild game.  Weighted Error Value: White=0.30/Black=0.33} 0-1

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "3.2"]
[White "Sjugirov, Sanan"]
[Black "Sarana, Alexey"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2663"]
[BlackElo "2649"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,91,-4,0,0,6,15,6,-31,-8,-13,-14,-12,-11,-9,-14,-22,0,-28,0,0,0,0,0,0,51,40,50,51,45,48,124,88,106,96,108,114,105,106,172,175,170,106,136,134,125,130,153,155,371,123,104,79,79,76,159,158,163,122,175,127,123,132,134,108,356,342,444,444,423,429,691,658,979,950,1170,816,2093,1595,29987,29988]} 1. e4 c5 2. Nc3 d6 3. f4 Nc6 4. Nf3 Nf6 5. Bb5 Bd7 6. O-O e6 7. d3 Be7 8. e5 {[#] B23: Closed Sicilian: Lines without g3.} Ng4 $146 ({Predecessor:} 8... dxe5 9. fxe5 Nd5 10. Ne4 h6 11. c4 Nc7 12. Bxc6 Bxc6 13. Qe2 Qd7 14. b3 O-O-O 15. Rd1 f5 16. exf6 gxf6 {½-½ (49) Dimitrov,R (2493)-Saravanan,V (2326) Cappelle-la-Grande 2018}) 9. h3 {[#] And now exd6 would win.} Nh6 10. Ne4 {The position is equal.} dxe5 11. Bxc6 Bxc6 12. Nxe5 Rc8 13. Be3 $36 {[%mdl 2048] Black is under pressure.} Nf5 14. Bf2 (14. Bxc5 $2 Bxc5+ 15. Nxc5 Qd4+ 16. Rf2 Qxc5 $19) 14... Bd5 15. Re1 (15. c4 $5 {[%cal Rc4d5]} Bc6 16. Nxc5 $11 (16. Bxc5 $2 Bxc5+ 17. Nxc5 Qd4+ {[%mdl 64] Double Attack} 18. Rf2 Qxc5 $19)) 15... O-O 16. c4 Bc6 17. Nxc5 Bxg2 18. Ncd7 Bc6 ({Better is} 18... Bh4 $11 19. Qe2 (19. Kxg2 Bxf2 20. Kxf2 Qh4+ {[%mdl 64] Double Attack} 21. Ke2 Rfd8 $15) 19... Bxh3) 19. Nxf8 $14 Bxf8 20. d4 (20. Bxa7 b6 $17) 20... Be8 21. d5 Qf6 (21... f6 $14) 22. Qh5 (22. Bxa7 $6 exd5 23. Bf2 (23. cxd5 b6 $11) 23... dxc4 $14) 22... exd5 23. Ng4 ({And not} 23. Bxa7 b6 $17) 23... Qg6 24. Qxg6 hxg6 25. cxd5 f6 (25... Bd6 $16 {might work better.}) 26. Rac1 $18 ({Much less strong is} 26. Bxa7 $6 Bd6 $16) 26... Ra8 27. Ne3 (27. Bc5 $18) 27... Nxe3 28. Rxe3 Bd6 29. Re4 {Hoping for Bc5.} Bd7 30. Kg2 Kf7 $2 (30... b6 $16 {was called for.} 31. h4 Kf7) 31. Rc3 $2 (31. Bc5 $18 Bf5 32. Rb4) 31... b6 $16 32. Bg3 Rh8 {[#]} 33. h4 $1 Rd8 (33... Rh5 $142) 34. a3 Bf5 35. Re2 Rd7 (35... Bb8 $16) 36. b4 Be7 37. Rd2 Be4+ 38. Kf2 Bxd5 $2 (38... f5 $16 {keeps fighting.}) 39. h5 $18 gxh5 40. Rcd3 h4 41. Bh2 ({Weaker is} 41. Rxd5 hxg3+ 42. Kxg3 Rxd5 $18) 41... Rc7 (41... Ke6 $142 42. f5+ {[%mdl 64] Deflection, Decoy} Kxf5 43. Rxd5+ Rxd5 44. Rxd5+ Ke6) 42. Rxd5 Ke8 43. f5 Rc3 44. R5d3 Rc1 45. Re2 Kf8 46. Rd7 {Weighted Error Value: White=0.19/Black=0.58} 1-0

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "3.3"]
[White "Paravyan, David"]
[Black "Bartel, Mateusz"]
[Result "0-1"]
[ECO "B08"]
[WhiteElo "2647"]
[BlackElo "2638"]
[Annotator "TA"]
[PlyCount "200"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,200,33,49,0,10,0,22,18,12,16,25,14,16,9,10,12,15,9,25,14,41,13,12,17,6,3,18,-81,-83,-66,-64,-97,-100,-119,-137,-147,-81,-68,-14,-11,-25,-23,-2,-77,-19,-74,-78,-83,-47,-66,-55,-46,0,-37,21,21,20,20,20,20,20,20,20,20,20,0,20,20,20,20,21,18,28,17,26,23,20,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-14,0,0,0,0,0,0,0,-29,0,0,0,0,160,-12838,-12839,-12839,-12839,-12839,-12839,-12839,-12840,-12841,-12841,-12841,-12841,-12843,-12844,-12845,-12844,-12845,-12844,-12845,-12845,-12845,-12846,-12846,-12845,-12848,-12841,-12842,-12842,-12843,-12843,-12843,-12842,-12843,-12843,-12843,-12844,-12845,-12842,-12842,-12843,-12844,-12845,-12846,-12843,-12845,-12844,-12848,-12844,-12844,-12844,-12845,-12845,-12846,-12846,-12847,-12844,-12845,-12845,-12845,-12846,-12847,-12845,-12846,-12846,-12847,-12847,-12848,-12847,-12848,-12847,-12848,-12847,-12847,-12847,-12848,-12848]} 1. d4 g6 2. e4 Bg7 3. Nf3 d6 4. Be3 Nf6 5. Nc3 O-O 6. Qd2 Bg4 7. Bh6 {B08: Pirc Defence: Classical System.} Bxf3 8. gxf3 e5 9. Bxg7 {The position is equal.} Kxg7 10. O-O-O {Black must now prevent dxe5.} Nc6 11. d5 Nd4 12. f4 $1 Nh5 13. fxe5 dxe5 {[#]} 14. h4 $146 ({Predecessor:} 14. Qe3 Qf6 15. Nb1 c6 16. c3 Nb5 17. dxc6 bxc6 18. Bxb5 cxb5 19. Rd7 Qc6 20. Rd5 {1-0 (49) Drakulic,A-Schmidt,W (2078) Germany 2010}) 14... h6 15. Qe3 Qf6 16. Nb1 a6 17. Nd2 c6 18. c3 Nb5 19. Nb3 {[#]} (19. dxc6 $11 bxc6 20. Be2) 19... cxd5 $1 $17 20. exd5 Nd6 $1 21. Kb1 {[#]} Rac8 $1 22. Bd3 Nf4 23. h5 g5 (23... Nxh5 $142 24. Nc5 Rfd8) 24. Bc2 Rfe8 (24... Rfd8 $15) 25. Nd2 $11 Nxd5 26. Qd3 Nf4 27. Qh7+ Kf8 28. Ne4 (28. Nf1 $1 $11 {keeps the balance.}) 28... Nxe4 $17 29. Bxe4 Rc7 30. Rhe1 Ke7 31. Bd5 Kf8 32. Bb3 Nxh5 {[#]} (32... e4 $15) 33. Rd6 $1 $11 {[%cal Rd6f6]} Qxd6 34. Qh8+ Ke7 35. Rxe5+ Qxe5 36. Qxe5+ Kd8 37. Qd6+ Kc8 38. a4 (38. Qxh6 {feels hotter.} Nf4 39. a4 Ne6 40. Qf6 Kb8 41. Qe5) 38... Nf4 39. Qxh6 Ne6 40. Qf6 Kb8 41. Bd5 Nf4 42. Bf3 ({Don't go for} 42. Bxf7 $2 Rf8 $19) 42... Re1+ 43. Ka2 Ne6 44. Bh5 Re4 45. Bxf7 Rxa4+ 46. Kb1 Rf4 47. Qh8+ Rc8 48. Qe5+ Nc7 49. Bh5 Rxf2 50. Qxg5 Rcf8 51. Ka2 R2f5 52. Qh6 Ra5+ 53. Kb3 Rb5+ 54. Ka3 Rd8 (54... Rbf5 {is more complex.} 55. Ka2) 55. b4 a5 56. Be2 axb4+ 57. cxb4 Re5 58. Bc4 Re4 59. Kb3 Rg4 60. b5 {Threatening b6.} Rg3+ (60... Rgd4 {seems wilder.} 61. Kc3 Rd1 62. Kb3 R8d6 63. Qh8+ Ka7) 61. Kb4 {b6 is the strong threat.} Rg4 62. b6 {And now Qh2! would win.} Ne8 $2 (62... Nd5+ $11 63. Kb3 Rg3+ 64. Kb2 Rg2+ 65. Ka3 Rg3+ 66. Bb3 Rd3) 63. Qh2+ $2 (63. Qe6 $16 Rgd4 64. Qe5+ R4d6 65. Qa5) 63... Nd6 $19 {Black is clearly winning.} 64. Qa2 Rxc4+ 65. Kb3 Rc6 66. Qa7+ Kc8 67. Qa8+ Kd7 68. Qa4 Rg8 69. Qd4 Rg5 70. Qe3 {[#]} Rxb6+ $3 71. Kc2 {[#]} Rc5+ $3 72. Kd1 Rb1+ 73. Ke2 Rb2+ 74. Kf3 Rbc2 75. Qh6 R2c3+ 76. Ke2 b5 77. Qg7+ Kc6 78. Qh8 Kb7 79. Qg7+ Rc7 80. Qe5 R3c6 81. Kd3 Rb6 82. Qd5+ Rcc6 83. Kd4 b4 {[%cal Bb5b4,Bb4b3][%mdl 32]} 84. Qb3 Nb5+ 85. Kd5 Nc7+ 86. Kd4 Rc3 87. Qb1 Rd6+ 88. Ke4 b3 89. Qb2 Nb5 90. Ke5 Re3+ 91. Kf4 Red3 92. Qg2+ Kb6 93. Qg7 Ka5 94. Qa1+ Kb4 95. Qe1+ Nc3 96. Qh1 b2 97. Qb7+ Ka3 98. Qa7+ Kb3 99. Qb7+ Kc2 {( -> ...R6d5)} 100. Qg2+ Rd2 {Weighted Error Value: White=0.11/Black=0.11} 0-1

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "3.4"]
[White "Khairullin, Ildar"]
[Black "Chigaev, Maksim"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2615"]
[BlackElo "2631"]
[Annotator "TA"]
[PlyCount "37"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,37,0,10,-38,-34,-47,-37,-50,-33,-63,-63,-54,0,0,0,0,0,0,0,0,0,0,38,0,0,0,18,0,33,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. b4 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} Bb6 7. e5 {[#]} d5 $1 {And now ...Ne4 would win.} 8. exf6 {Black is slightly better.} dxc4 9. Qe2+ Be6 $1 (9... Kf8 $6 10. b5 $11) 10. b5 $1 {[#]} d3 $1 11. Qe4 $1 $11 Nb4 $1 {[%cal Rb4c2]} 12. O-O $1 {[#]} Qd5 $146 ({Predecessor:} 12... Nc2 13. fxg7 Rg8 14. Bg5 Qd5 15. Qxh7 Kd7 16. Nbd2 Bf5 17. Qh5 Rae8 18. Bf6 Be4 {1-0 (46) Windhausen,G (2304)-Mirbach,T (2056) GER email 2011}) 13. fxg7 Rg8 14. Qxh7 O-O-O {Threatens to win with ...Bf5.} 15. Bg5 ({But not} 15. cxb4 Bd4 $19) 15... Bf5 16. Qh5 Be6 $1 17. Qh7 ({Much weaker is} 17. cxb4 Rxg7 18. Nc3 Qf5 $15) 17... Bf5 18. Qh5 Be6 $1 19. Qh7 {Weighted Error Value: White=0.08/Black=0.07} ({Much worse is} 19. cxb4 Rxg7 20. Nc3 Qf5 $15) 1/2-1/2

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "3.5"]
[White "Drygalov, Andrey"]
[Black "Dragun, Kamil"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "2493"]
[BlackElo "2569"]
[Annotator "TA"]
[PlyCount "34"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,34,15,34,0,13,0,7,6,8,7,7,4,6,0,9,0,16,-108,-113,-928,-918,-29984,-29985,-29997,-29998]} 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 g6 6. Bf4 Bf5 7. Be2 {B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack.} e6 8. Nf3 Bd6 9. Bxd6 {The position is equal.} Qxd6 10. O-O {[#]} Nf6 $5 $146 {[%mdl 8] An interesting novelty.} ({Predecessor:} 10... Nge7 11. Nbd2 O-O-O 12. b4 f6 13. b5 Nb8 14. c4 Nd7 15. Rc1 Kb8 16. c5 Qc7 {1-0 (44) Amanov,Z (2338)-Jobava,B (2603) Chess.com INT 2020}) 11. Na3 h5 12. Nc2 Ng4 13. h3 Be4 {Threatens to win with ...Bxf3.} 14. g3 {[#]} ({Inferior is} 14. hxg4 hxg4 15. g3 Rh3 $17) (14. Nce1 $11) 14... h4 $1 $40 {[%cal Rh4g3][%mdl 128] Black is out for blood.} 15. hxg4 $4 {[%mdl 8192]} (15. Nd2 $17 Nxf2 {[%mdl 64] Decoy} 16. Rxf2 Qxg3+ 17. Kf1 Qxh3+ 18. Ke1) 15... hxg3 $19 {( -> ...Bxf3)} 16. Ne3 g2 17. Nxg2 Bxf3 {[%csl Gh8][%cal Rd6h2] Weighted Error Value: White=1.07/Black=0.06} 0-1

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "3.6"]
[White "Belous, Vladimir"]
[Black "Drygalov, Sergey"]
[Result "1/2-1/2"]
[ECO "A28"]
[WhiteElo "2524"]
[BlackElo "2490"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,70,1,10,-15,-15,-18,-18,-12,0,-1,-4,0,0,-39,-19,-45,-54,-50,-25,-225,-241,-239,-130,-119,-129,-124,-85,-76,-34,-71,6,6,7,0,19,0,0,0,82,-236,0,-28,-29,-150,-48,-248,-79,-208,0,0,0,0,0,0,0,-8,0,0,0,-19,0,0,0]} 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. e4 Bb4 5. d3 O-O 6. g3 {A28: English Opening: Four Knights Variation.} d6 7. h3 {[#]} a6 $146 ({Predecessor:} 7... Nd4 8. Bg2 Nxf3+ 9. Qxf3 c6 10. O-O a6 11. Be3 b5 12. cxb5 axb5 13. a3 Bxc3 14. bxc3 {1-0 (43) Lenderman,A (2599)-Onischuk,A (2672) Saint Louis 2018}) 8. Bg2 Bxc3+ 9. bxc3 b5 10. O-O bxc4 11. d4 (11. Qa4 $5 {[%cal Ra4c6]} Bd7 12. Qxc4 $11) 11... exd4 12. Nxd4 Bd7 $36 {[%mdl 2048] Black is pushing.} 13. Bg5 h6 14. e5 $2 Nxe5 $19 ({Weaker is} 14... hxg5 15. Nxc6 Bxc6 16. Bxc6 $11) 15. Bxa8 hxg5 (15... Qxa8 $19 16. Bxf6 Bxh3) 16. Bg2 $17 g4 17. hxg4 Nfxg4 18. Qd2 c5 (18... Nf6 {feels hotter.} 19. Qg5 Nd3 20. Nc2 c5 21. Ne1 Re8) 19. Ne2 Bc6 (19... Nd3 $17) 20. Bxc6 $11 Nxc6 21. Rad1 Nce5 {Threatens to win with ...Nf3+.} 22. Qxd6 Qg5 {( -> ...Qh5)} 23. Nf4 Qf5 (23... Re8 $11) 24. Qd5 $2 {[%mdl 8192]} (24. f3 $16 {is necessary to keep the advantage.} Ne3 {[%mdl 64] Double Attack} 25. Rde1) 24... Nf6 ({Black should try} 24... Qh7 $1 $19 {[%csl Gg4][%cal Rh7h2]} 25. Qh1 Nf3+ $1 26. Kg2 Qe4) 25. Qg2 g5 26. Rfe1 {[#]} Kg7 (26... Qg4 $1 $17 {And now ...Nf3+ would win.} 27. Nh3 Nf3+ {[%mdl 64] Double Attack} 28. Kh1 Nxe1 29. Rxe1 Rd8) 27. Re3 Nfg4 $2 (27... Neg4 $19 {has better winning chances.} 28. Rf3 gxf4 29. Rxf4 Qc2) 28. Nd5 (28. Nh5+ $17 Kh6 29. Rxe5 Nxe5 30. g4 Qxg4 31. Qxg4 Nxg4 32. Ng3) 28... Nxe3 $2 ({Better is} 28... Rh8 $19 29. Rxe5 Nxe5) 29. Nxe3 {The position is equal.} Nf3+ 30. Kf1 Qe4 31. Qh3 Re8 32. Rd5 Qb1+ 33. Rd1 Qe4 34. Rd5 Qb1+ 35. Rd1 Qe4 {Weighted Error Value: White=0.53/Black=0.42} 1/2-1/2

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "4.1"]
[White "Fedoseev, Vladimir"]
[Black "Predke, Alexandr"]
[Result "1-0"]
[ECO "C58"]
[WhiteElo "2687"]
[BlackElo "2690"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,71,32,22,17,20,27,20,29,13,18,22,14,21,74,68,70,75,60,60,44,41,89,66,89,90,167,154,160,167,177,174,165,173,164,167,293,295,304,289,293,295,286,275,290,303,304,303,304,297,479,480,454,454,566,591,2663,2672,1823,1715]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 {[#]} 8. Qf3 $1 Be7 {C58: Two Knights: 4 Ng5 d5 5 exd5 Na5 sidelines.} 9. Bd3 $1 {[%mdl 4] is recently more successful than 9.Bxc6+.} O-O 10. Nc3 {10.0-0 is not played anymore.} h6 {The position is equal.} 11. Nge4 Nd5 {Strongly threatening ...f5.} 12. Ng3 Nb4 13. Nf5 Nxd3+ (13... Bg5 $11 {remains equal.}) 14. Qxd3 $16 Bc5 {White must now prevent ...Qxd3.} 15. Qxd8 Rxd8 {[#]} 16. g4 $146 ({Predecessor:} 16. Ng3 f5 17. d3 Nb7 18. O-O Nd6 19. Na4 Bb4 20. a3 Ba5 21. b4 Bc7 22. Bb2 {1-0 (52) Fier,A (2570)-Szczepkowska,K (2396) Paleochora 2018}) 16... h5 17. h3 g6 {[#]} 18. Ne4 $1 {White now steadily converts the win.} gxf5 19. Nxc5 e4 (19... Nb7 $16) 20. gxf5 Bxf5 21. b3 Rd5 22. Ba3 Rb8 23. Rg1+ Kh7 24. c4 Rdd8 (24... Re5 $142 25. O-O-O f6) 25. Rg5 $18 Bg6 26. Na6 Nxb3 27. axb3 ({Less strong is} 27. Nxb8 Nxa1 28. Nxc6 Nc2+ 29. Kd1 Rc8 $11) 27... Rxb3 28. Rg1 Rd4 29. Bc5 Rxc4 30. Be3 ({Don't play} 30. Bxa7 Rxh3 31. Nc7 Rb3 $18) 30... Rb5 31. Nc7 Rb7 (31... Re5 32. Ke2 h4 33. Rxa7 Bh5+ 34. f3 exf3+ 35. Kf2 Bg6) 32. Ne8 {White is clearly winning.} Rcb4 33. Ke2 h4 34. Rg4 f5 35. Rxh4+ Kg8 36. Rg1 {Weighted Error Value: White=0.02/Black=0.29} 1-0

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "4.2"]
[White "Sarana, Alexey"]
[Black "Sjugirov, Sanan"]
[Result "0-1"]
[ECO "C89"]
[WhiteElo "2649"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "167"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,167,28,32,34,0,0,0,9,0,29,22,25,23,41,43,35,27,54,34,25,32,28,12,11,4,4,4,13,-221,-200,-284,-270,-349,-349,-345,-316,-336,-235,-243,-235,-235,-209,-209,-204,-204,-195,-213,-214,-207,-197,-207,-198,-198,-197,-198,-197,-197,-167,-173,-173,-189,-189,-198,-198,-234,-220,-426,-298,-412,-412,-416,-416,-495,-475,-484,-415,-450,-412,-427,0,-420,-403,-508,-504,-506,-493,-506,-506,-502,-498,-498,-497,-483,-475,-461,-393,-393,-302,-281,-233,-233,-233,-355,-211,-524,-498,-647,-647,-639,-633,-625,-587,-967,-962,-942,-622,-12837,-12837,-12837,-12838,-12836,-1204,-12841,-12841,-12841,-12839,-12845,-12845,-12845,-12843,-12844,0,-12845,-12844,-12845,-12844,-12845,-12846,-12847,-12847,-12849,-12849,-12850]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d3 Bd6 13. Re1 Bf5 {The main line 13...Bf5 scores better than 13...Qh4.} 14. Qf3 Qf6 {C89: Closed Ruy Lopez: Marshall Attack.} 15. Be3 Qe5 16. g3 Bxd3 {The position is equal.} 17. Nd2 Qf5 18. Bd4 Rfe8 19. a4 {[#]} Rxe1+ $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 19... h6 20. a5 Kf8 21. Qxf5 Bxf5 22. Bxd5 cxd5 23. b4 f6 24. f3 Kf7 25. Kf2 h5 {½-½ (39) Kryvoruchko,Y (2669)-Aronian,L (2758) Douglas 2019}) 20. Rxe1 h6 21. Kg2 Bc2 22. Qxf5 Bxf5 23. Ne4 Bf8 24. Nc5 Nb6 25. Re5 Bg6 {...Bxc5 is the strong threat.} 26. axb5 axb5 {[#] White must now prevent ...Bxc5.} 27. f4 $2 (27. Ne6 $1 $11 Nd7 28. Re2 $1) 27... Bxc5 $19 28. Rxc5 (28. Bxc5 $142 Nd7 29. Kf2) 28... Nd7 29. g4 Be4+ 30. Kf2 Nxc5 31. Bxc5 {[%mdl 4096] Endgame KRB-KB} Rd8 32. Ke3 Bd5 33. Bc2 f6 34. h4 Re8+ 35. Kf2 Bc4 36. Be3 Ra8 37. Bc5 Ra1 38. Bf5 Kf7 39. h5 Be6 {Strongly threatening ...Bxf5.} 40. Bg6+ Kg8 41. Kg3 Rd1 42. b4 Bd5 43. Bf5 Rd2 44. Bg6 Re2 45. Bd4 Be4 46. Be8 $2 (46. Bxe4 {is a better defense.} Rxe4 47. Kf3) 46... Kf8 47. Bd7 Ke7 48. Bc8 Kf7 49. Bd7 Rd2 50. Kh4 Rh2+ 51. Kg3 Rg2+ 52. Kh4 Rh2+ 53. Kg3 Ra2 54. Kh4 Ke7 55. Bc8 Ra8 56. Bc5+ Kf7 57. Bb7 Rb8 58. Ba6 Bd5 59. Bd4 Re8 60. Bb7 Re4 61. Kg3 Re2 62. Bc8 Be6 63. Bb7 {[#]} Bd7 $1 64. Kf3 (64. f5 {was the only defense.}) 64... Ra2 (64... Re8 $142 {Hoping for ...Rb8.} 65. Bc5 Rb8) 65. Kg3 $2 (65. f5) 65... Ke6 66. g5 Kd6 67. gxh6 gxh6 68. Bxf6 Kc7 69. Bxc6 Kxc6 70. Bg7 Rc2 71. Bxh6 Rxc3+ 72. Kh4 Rc4 73. Kg5 Rxb4 74. Bg7 Rb1 75. h6 Rh1 76. f5 Kd5 77. Kg6 Be8+ 78. Kf6 Bd7 79. Kg6 Rf1 {Black is clearly winning.} 80. f6 Be8+ 81. Kg5 Rh1 82. Bf8 Ke6 83. Bc5 Rh5+ 84. Kg4 {Weighted Error Value: White=0.32/Black=0.20} 0-1

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "4.3"]
[White "Bartel, Mateusz"]
[Black "Paravyan, David"]
[Result "1/2-1/2"]
[ECO "D00"]
[WhiteElo "2638"]
[BlackElo "2647"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,101,0,16,0,0,0,0,0,0,0,114,18,38,38,29,28,45,40,45,56,51,56,59,57,60,17,10,16,21,18,36,9,22,7,12,0,0,-8,-8,-8,22,21,19,35,257,0,10,9,13,0,22,26,196,206,202,207,200,14,14,14,14,14,14,14,16,14,443,459,451,451,451,426,425,397,342,90,162,0,0,0,0,0,0,0,0,0,0,0,0,-8,-8,-8,-8,-8]} 1. d4 Nf6 2. Bg5 d5 3. e3 c5 4. Nd2 Nc6 5. Ngf3 Ne4 6. Bf4 {D00: 1 d4 d5: Unusual lines.} Qb6 7. Nxe4 dxe4 8. d5 {aiming for Ng5.} exf3 9. dxc6 Qxb2 {[#]} (9... f6 $11 {keeps the balance.}) 10. Rb1 ({Better is} 10. Be5 $1 $16 {[%cal Re5b2][%mdl 512]} Qb4+ 11. c3) 10... Qc3+ $11 11. Qd2 Qxd2+ 12. Kxd2 bxc6 13. gxf3 {[#]} g6 $146 ({Predecessor:} 13... f6 14. Bc7 e5 15. Bc4 Kd7 16. Ba5 Bd6 17. Rhg1 g6 18. h4 Rb8 19. Rbe1 Ke7 {0-1 (32) Hiegel,J (2050)-Benitah,Y (2341) France 2003}) 14. Bc4 Bg7 15. Rb8 Rxb8 16. Bxb8 a5 17. a4 (17. Rb1 {is interesting.} Rf8 18. Bc7 a4 19. Ke2 h6 20. Rd1) 17... Be6 18. Bxe6 fxe6 {[%mdl 4096] Endgame KRB-KRB} 19. Rb1 O-O 20. Bc7 Rxf3 21. Ke2 Rh3 22. Bxa5 Rh4 $1 ({Much worse is} 22... Rxh2 $6 23. c4 $16) 23. f4 Rxh2+ 24. Kd3 c4+ {[%mdl 64] Decoy} 25. Kxc4 Rxc2+ 26. Kb3 Rc5 ({Black should try} 26... Rf2 $1 $14) 27. Bb4 $2 (27. Bb6 $1 $18 {[%cal Rb6c5]} Rc3+ 28. Kb4) 27... Rd5 28. Kc4 e5 29. a5 {And now a6 would win.} exf4 30. a6 fxe3 $2 (30... Rd8 $11 31. a7 f3) 31. a7 $1 $18 {[%cal Ra7a8]} Rd4+ 32. Kc5 Rd8 33. Kxc6 $2 (33. Ba5 $1 $18 {[%cal Ra5d8]} Rd5+ 34. Kb4 Rb5+ 35. Ka4 Rxb1 36. a8=Q+ {[%mdl 64] Double Attack} Kf7 37. Qxc6) 33... Kf7 $11 {Strongly threatening ...Bd4.} 34. Bc5 e2 35. Re1 Be5 $1 ({But not} 35... Rc8+ $2 36. Kb7 $18) 36. Rxe2 Kf6 37. Ra2 Rc8+ {[%mdl 8192] [#]} (37... Ra8 $11 {and Black stays safe.}) 38. Kb7 $1 $18 {[%cal Rb7c8]} Rc7+ 39. Kb6 Rc8 40. a8=Q Rxa8 41. Rxa8 h5 42. Kc6 $2 (42. Rf8+ $18 Ke6 43. Rg8) 42... Ke6 {[#]} (42... e6 $16 {keeps fighting.}) 43. Ra2 $2 ({White must play} 43. Rg8 $1 $18 {[%cal Rg8g6]}) 43... h4 $11 {The position is equal.} 44. Re2 {Black must now prevent Bd4.} Kf5 $1 45. Bxe7 h3 46. Kd5 Bg3 47. Re6 g5 (47... h2 $5 48. Rf6+ $8 Kg4 $11) 48. Rh6 Kg4 49. Ke4 h2 {Hoping for ...Bh4.} 50. Rxh2 Bxh2 51. Bxg5 {Black escapes into a draw.  Weighted Error Value: White=0.38/Black=0.44} 1/2-1/2

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "4.4"]
[White "Chigaev, Maksim"]
[Black "Khairullin, Ildar"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2631"]
[BlackElo "2615"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,59,7,17,17,17,17,17,17,17,15,19,18,13,20,30,24,23,25,22,26,22,15,20,22,13,31,22,25,22,21,33,25,23,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 Be6 9. Bxe6 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} fxe6 10. Ng5 Qd7 11. Qf3 d5 $1 {[%cal Rd5d4]} 12. O-O-O {[%cal Re4d5]} d4 {[#]} 13. Bxd4 $1 exd4 {[#]} 14. e5 $1 O-O {[#]} (14... Nc6 15. exf6) 15. Qh3 $1 h6 $1 {[%cal Rh6g5]} 16. Nxe6 {[%mdl 64] Double Attack} Nc6 17. exf6 Rxf6 {[#]} 18. Rhe1 Re8 {[#] White must now prevent ...Rxe6.} 19. Nxd4 $146 ({Predecessor:} 19. f4 Bf8 20. f5 Qf7 21. Ne2 Rxf5 22. N2xd4 Nxd4 23. Nxd4 Rh5 24. Qf3 Rxe1 25. Rxe1 Rxh2 26. Qe4 Qf2 27. g4 {½-½ (27) Ivanov,V (2195)-Khorunzhy,M (2233) ICCF email 2013}) 19... Qxh3 20. gxh3 Rxf2 {Strongly threatening ...Bg5+.} 21. Kb1 Rxh2 22. Nxc6 bxc6 23. Rd3 Kf7 24. a3 Bf6 {The position is equal.} 25. Ne4 {aiming for Nd6+.} Re6 26. Nd6+ Ke7 $1 27. Nc8+ Kf7 28. Nd6+ Ke7 $1 29. Nc8+ Kf7 30. Nd6+ {An uneventful encounter.  Weighted Error Value: White=0.01/Black=0.01} 1/2-1/2

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "4.5"]
[White "Dragun, Kamil"]
[Black "Drygalov, Andrey"]
[Result "1/2-1/2"]
[ECO "D83"]
[WhiteElo "2569"]
[BlackElo "2493"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,103,4,17,19,0,0,0,9,0,0,-2,37,0,0,-2,0,0,0,0,0,0,29,26,34,32,56,47,49,44,45,31,39,0,0,0,0,0,8,0,0,0,4,-10,0,0,0,0,2,0,53,60,77,87,102,97,93,83,100,89,131,135,143,76,93,57,57,72,97,75,68,29,116,129,113,14,131,143,228,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1 Be6 {D83: Grünfeld: 4 Bf4 Bg7 5 e3 0-0.} 7. cxd5 Nxd5 8. Nxd5 Qxd5 9. a3 Qa5+ 10. Qd2 Qxd2+ 11. Kxd2 c6 12. Nf3 {[#]} Bd5 $146 ({Predecessor:} 12... Nd7 13. Bd3 Rad8 14. Ke2 Bg4 15. h3 Bxf3+ 16. gxf3 e5 17. dxe5 Bxe5 18. Bxe5 Nxe5 {0-1 (56) Aleksandrov,A (2574)-Grigoriants,S (2546) Chess.com INT 2020}) 13. Bc4 Bxf3 14. gxf3 Nd7 15. Ke2 e5 16. dxe5 Nxe5 17. Ba2 Rfd8 {White should prevent ...Nd3.} 18. Rhd1 Bf6 19. Bg3 Kf8 20. f4 Nd7 21. f5 Nb6 22. fxg6 hxg6 23. Rc2 Na4 24. Rb1 Rd7 25. Bb3 Nb6 26. e4 Bd4 27. f4 Re8 28. Kf3 Bg7 {White must now prevent ...Rd3+.} 29. Re1 Bd4 (29... f5 $11) 30. e5 $14 c5 31. Bh4 c4 32. Ba2 Rc8 33. Rd1 Rcc7 34. Be1 Na4 35. Bb4+ (35. Bxc4 $6 Nxb2 36. Bb4+ Kg7 $11) (35. Rxc4 Rxc4 36. Bxc4 Nxb2 $14) 35... Kg7 36. Rdd2 ({Of course not} 36. Bxc4 $6 Nxb2 37. Rdc1 Nxc4 $11) (36. Bd6 $142 Bxb2 37. Rxc4 (37. Bxc4 Bxa3 38. Bb3 Nc3 $16) 37... Rxc4 38. Bxc4) 36... b5 $16 37. Bd6 Bxb2 $1 38. Bxc7 (38. Rxb2 c3 $17) 38... Rxc7 39. h4 ({Worse is} 39. Rxb2 c3 $17) 39... Bxa3 40. h5 Be7 {[#]} (40... Bb4 $11 {remains equal.} 41. Rg2 Nc3) 41. hxg6 $1 fxg6 42. Rg2 (42. Rc1 $16) 42... Kf7 (42... Rd7 $11 {keeps the balance.}) 43. Bb1 {[%mdl 1024] White has strong compensation.} Rc6 {[#]} (43... g5 $16) 44. Rcd2 $2 (44. Rh2 $1 $18 {[%cal Rh2h7]} Kg7 45. Rcg2) 44... Nc3 $11 {The position is equal.} 45. Bc2 {Strongly threatening Rh2.} b4 {Black wants to play ...b3.} 46. f5 gxf5 47. Bxf5 {Hoping for Rh2.} Rc5 48. Kf4 {And now e6+ would win.} Nd5+ 49. Ke4 Nc3+ 50. Kf4 Nd5+ 51. Ke4 Nc3+ 52. Kf4 {Weighted Error Value: White=0.14/Black=0.16} 1/2-1/2

[Event "Collegiate Champions Open RUS-USA"]
[Site "Online"]
[Date "2021.01.08"]
[Round "4.6"]
[White "Drygalov, Sergey"]
[Black "Belous, Vladimir"]
[Result "1-0"]
[ECO "E60"]
[WhiteElo "2490"]
[BlackElo "2524"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2021.01.08"]
[EventType "team-tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,83,31,36,40,33,32,20,24,15,35,20,20,20,47,53,65,57,67,72,91,5,9,14,10,0,8,-7,0,-21,-34,-18,10,-21,0,0,20,25,25,42,50,52,58,44,45,57,152,149,138,138,128,144,135,136,162,155,485,285,452,450,460,450,943,946,926,924,1369,1060,29983,29984,29994,29995,29998,29999]} 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 c5 5. Nc3 Qa5 6. Bg2 Ne4 7. Qd3 cxd4 {E60: King's Indian: Unusual lines and Fianchetto Variation without Nc3.} 8. Nxd4 ({But not} 8. Qxe4 $2 dxc3 9. b4 Qxb4 $19) 8... Nc5 9. Qd1 Nc6 {The position is equal.} 10. e3 Ne6 {[%cal Rc6d4]} 11. O-O O-O {[%cal Re6d4] [#]} 12. Re1 $146 ({Predecessor:} 12. Nxe6 dxe6 13. Bd2 Rd8 14. Qe2 Qb6 15. Rab1 Bd7 16. b4 Rac8 17. c5 Qc7 18. Rfd1 {0-1 (49) Gelfand,B (2753)-Svidler,P (2751) Jerusalem 2014}) 12... Qc5 13. Nd5 Qxc4 {[%cal Re6d4]} 14. b3 {[%cal Bb2b3,Bb3b4][%mdl 32]} Qc5 {[%cal Re6d4]} 15. b4 {[%mdl 1024] White has compensation.} Qd6 {[#]} 16. Nb5 $1 Qb8 $11 17. Rb1 a6 18. Nbc3 b5 19. Bb2 d6 20. Ne4 Ra7 21. Bxg7 Nxg7 22. f4 (22. Ndf6+ $5 Kh8 23. Nxd6 $11) 22... Be6 23. Ndf6+ exf6 (23... Kh8 $5 {[%cal Re7f6]} 24. Nxh7 Kxh7 25. Ng5+ {[%mdl 64] Discovered Attack} Kg8 26. Nxe6 Nxe6 27. Bxc6 Rc8 $11) 24. Nxf6+ {[%mdl 64] Discovered Attack} Kh8 {Strongly threatening ...Ne7.} 25. Bxc6 Bxa2 26. Ra1 {[%cal Bb1a1,Ba1a2,Ba2c2,Bc2c6,Bc6d6][%mdl 32]} Qb6 27. Rxa2 Qxc6 28. Rc2 $40 {[%mdl 128] White is up to no good.} Qb6 (28... Qa8 $14) 29. Nd5 $16 Qd8 30. Qd4 Ra8 31. Rec1 f6 32. Rc6 Ne6 33. Qd3 Kg7 $2 {Black cannot hold the game after this.} (33... Ng7 $16 {is tougher.} 34. e4 Ne8) 34. Nb6 (34. Qe4 $142 Re8 35. Nc7) 34... Ra7 (34... Rb8 $142) 35. Rxd6 $18 Qe8 36. Rcc6 Re7 (36... Nd8 $142) 37. Nd5 {[%mdl 64] Discovered Attack} Rff7 38. Qc3 Nd8 39. Nxf6 Rxf6 40. Qxf6+ {White mates.} Kh6 41. Rc5 Nf7 {[#]} 42. Rh5+ $1 {[%mdl 576] Pin, Decoy.  Weighted Error Value: White=0.12/Black=0.42} 1-0

