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Sergash
Member since Aug-12-09 · Last seen Mar-02-21
Living in Montréal, Québec.

   Sergash has kibitzed 365 times to chessgames   [more...]
   Feb-23-21 Capablanca vs E Corzo, 1901
 
Sergash: <31.a5-a6 -+> Even stronger is 31.Ra7-c7! Rb2-a2 32.b3-b4 -+ Stockfish 12 - 64 bits POPCNT. <31...Rb2xb3? 32.Ra7-c7 b5-b4 33.a6-a7 Rb3-a3 34.Rc7-c8+ Kf8-e7 35.a7-a8Q 1-0> As noticed by <NBZ>, this is a mistake. Though also losing, Black would have offered a better ...
 
   Feb-14-21 Leon Paredes vs Capablanca, 1901
 
Sergash: <13...c7-c6 14.c3-c4 -+> 13...e4xf3e.p.! 14.g2xf3 g7-g5! -+ Δ 15.Be3xg5? Rh8-g8 Stockfish 12 - 64 bits POPCNT. <14...a7-a6 15.Be3-b6 Ba4xb3 16.a2xb3 Ne7-g6 17.g2-g3 Bf8-e7! 18.Kg1-f2 h7-h5! 19.h2-h4 -+> Strange move... More logical would be 14...b7-b6! -+ ...
 
   Feb-10-21 Capablanca vs E Delmonte, 1901
 
Sergash: <9...d7-d6?! +-> Seems logical, but better are: A) 9...Ng8-h6 10.Ra1-c1 b7-b6 (or 10...f7-f6 11.Rc1-c3 +- Stockfish 12 - 64 bits POPCNT) 11.Nd2-c4 +- Stockfish 12 - 64 bits POPCNT. B) 9...b7-b6 10.Nd2-c4 +- Stockfish 12 - 64 bits POPCNT. <10.Ra1-c1 +-> Good enough, but ...
 
   Sep-18-20 Carlsen vs Aarland, 2002
 
Sergash: <10.0-0-0?! => Seemingly too optimistic. 10.Ra1-d1! Qd8-a5! 11.Nf3-d2! and here not 11.b2-b4?? Nc6xb4 12.a3xb4 Bc5xb4 13.Rd1-c1 (or 13.Bf4-e5 Nf6-e4 14.Rd1-c1 transposing) Nf6-e4 14.Bf4-e5 f7-f6 ▢ 15.Bf1-d3 f6xe5 16.Bd3xe4 d5xe4 17.Nf3-g5 (or 17.Nf3-d2 Bc8-d7! -+ ...
 
   Sep-13-20 V Hansen vs Carlsen, 2002
 
Sergash: In the final position, Hansen possibly realized that continuing the game was hopeless after 41.Kh2xg2 a7-a5 42.Kg2-f2 a5-a4 43.Kf2-e2 b4-b3 (or 43...a4-a3 44.Ke2-d2 b4-b3 45.a2xb3 a3-a2 mating in 16 moves or less. Stockfish 11 - 64 bits POPCNT) 44.a2xb3 a4-a3! etc. mating in 18 ...
 
   Sep-01-20 B E Glenne vs Carlsen, 2002
 
Sergash: <24.Bc1-b2? g5-g4! (to prevent White from answering h5-h4 with g3-g4, keeping the position closed) 25.Ra1-c1 c7-c6 ∓> Either: A) 24.Ra1-a2 Kc8-d7 ⩱ Stockfish 11 - 64 bits POPCNT (or 24...Re8-e6 ⩱; but not 24...Nf5xd4?! 25.Ra2-d2 = / ⩲ Stockfish 11 - ...
 
   Aug-27-20 Carlsen vs Michael Rosbach, 2001
 
Sergash: <29.Rc4-b4 Qb8-d8 30.g2-g3 +-> 29.Qf3-f4! Qb8-e8 30.g2-g3! +- Komodo 9.2 64 bits. <30...Qd8-d7?! 31.Rb4-b8+ Bg7-f8 32.Qf3-a8! Qd7-d6 +-> 30...Bg7-e5 would give some space to the black king... <33.Qa8-b7 Kg8-g7> Better is 33.Rb8-d8 +- Komodo 9.2 64 bits. Also enough
 
   Aug-27-20 Carlsen vs T Nyback, 2001
 
Sergash: <24...Qe7-d6?! 25.e4-e5 Qd6-d5+ 26.Qe2-f3 Rf8-d8 27.Qf3xd5 c6xd5 ⩲> Equality is maintained with the moves 24...Rf8-e8 =, 24...Rf8-d8 = or even 24...a7-a5 = Komodo 9.2 64 bits. <28.Kg2-f3? c5-c4! 29.b3xc4 Rb5-a5! ⩱> Carlsen had to take the C-pawn here: ...
 
   Aug-27-20 G Kaiser vs Carlsen, 2000 (replies)
 
Sergash: DizSize, capturing with the pawn is better because you get two mobile pawns on f5 and e5 which control center squares and later could be moved forward to open lines of attack, create an eventual passed pawn, chase the white pieces etc.
 
   Aug-26-20 S Halkias vs Carlsen, 2002
 
Sergash: <23.Rg1-g4?! 1/2-1/2> Better is 23.Ra1-b1 Ba6xc4 24.Rb1-b4 Qa4xb4! 25.c3xb4 Bc4xd3 26.e2xd3 Rd8-e8+ 27.Ke1-f1 Rh8-h7 -+ Δ Rh7-e7 Stockfish 11 - 64 bits POPCNT. If the game had continued, it could have looked like 23.Rg1-g4?! Rd8-e8 24.Rg4xf4 Rh8-g8 -+. Stockfish 11 - 64 ...
 
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