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Lev Polugaevsky vs Leonid P Maslov
9th Soviet Team-ch qual group 2 (1963), Moscow URS, rd 3, Aug-09
Formation: King's Indian Attack (A07)  ·  1-0



Annotations by Stockfish (Computer).      [20742 more games annotated by Stockfish]

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sac: 25.Rd5 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Mar-12-05  blackpawnther: wow awesome game. i like 22.Bxe5 cause black cant take unless he wants serious adding this to my favorite games.
Jul-30-05  flor: beautiful attacking game.

Analysis from Fritz 8: Early on in the game, the computer comes up with this alternative for black: 15. ... axb3
16. axb3 Ra2
17. Bc3 Qg4
Qg4 defends the kingside and pins the knight. White's plan to Ng5-Qg4 has been stopped. 18. hxg6 hxg6

with about equal game, still according to Fritz.

Sep-16-13  computer chess guy: 25. Rd5 is quite a spectacular move, but it was better to play immediately 25. Be6!! - in fact this is a forced mate:

click for larger view

Analysis by Houdini 3 w32:

1. (#19): 25.Be6 Qc5+ 26.Kh1 Rxd1 27.Rxd1 Rc8 28.Bxc8 Qb5 29.Bxf6 Bxf6 30.Rd8+ Qe8 31.Qh6+ Bg7 32.Nh7+ Kf7 33.Be6+ Bxe6 34.Ng5+ Kf8 35.Nxe6+ Kf7 36.Qxg7+ Kxe6 37.Rxe8 Kd6 38.Rxe7 Kc6 39.Rxc7+ Kb5 40.c4+ Ka5 41.Qe5+ Kb4 42.Qb2+ Ka5 43.Qb5#

Also after 25. Rd5, Houdini indicates Black actually had an escape via the move 26. .. Rd7!:

click for larger view

Taking the Rook is not good: Bxd7 Qxd7 and Black is at least temporarily safe and threatens the White Rook, Knight and Bishop.

Premium Chessgames Member
  whiteshark: <computer chess guy: 25. Rd5 is quite a spectacular move, but it was better to play immediately 25. Be6!! - in fact this is a forced mate> Really?

click for larger view

White to move

1) +10.1 (32 ply) 25.Be6 Qc5+ 26.Kh2 Bxf1 27.Rxf1 Rd2+ 28.Kh3 fxe5 29.f5 Qxc2 30.fxg6+ Rf2 31.Bf7 Rh2+ 32.Kg4 Qe2+ 33.Rf3 Qxe4+ 34.Nxe4 Rxh7 35.gxh7 Bh8 36.Bh5+ Kg7 37.Bxe8 Kh6 38.Rf8 Bg7 39.h8=R+ Bxh8 40.Rxh8+ Kg7 41.Rh2 Nd5 42.Rd2 Nf6+ 43.Nxf6 Kxf6 44.Bxa4 e4 45.Rd7 e3 46.Rxc7 e2 47.Rc6+ Ke5 48.Rc8 Kd4 49.Re8 Kd3 50.Bb5+ Kc3 51.Rxe2 Kb4 52.Bd3

2) +8.84 (32 ply) 25.Bxf6 Bxf6 26.Rd5 Bxd5 27.exd5 Bd4+ 28.Kh2 Qe2+ 29.Kh1 Bg7 30.Ne6+ Qxe6 31.Bxe6 Rxd5 32.f5 Rxf5 33.Rxf5+ Nxf5 34.Qg8+ Ke7 35.Qf7+ Kd6 36.Qxe8 Nxg3+ 37.Kg2 Nh5 38.Qd7+ Ke5 39.Bg4 Kf6 40.Qd8+ Kf7 41.Qxc7+ Kg8 42.Qxb6 Kh7 43.Qa5 Kh6 44.Qxa4 Kg5 45.Qc4 Kh6 46.Be6 Bb2 47.Kf2 Bc1 48.Qd4 Kh7 49.Bc4 Nf4 50.Qe5 Kh6

3) +5.06 (31 ply) 25.Rd3 Rd6 26.Bxd6 cxd6 27.Rf2 f5 28.exf5 Bg8 29.Ne6+ Bxe6 30.f6 Nf5 31.fxg7+ Nxg7 32.Rxd6 Qh5 33.Qxh5 gxh5 34.Bxe6 Rxe6 35.Rfd2 Kf7 36.Rxe6 Kxe6 37.Re2+ Kf6 38.Re5 Nf5 39.Kf2 h4 40.g4 Ng7 41.Kf3 Kf7 42.c3 h3 43.Kg3 h2 44.Kxh2 Ne6 45.f5 Ng5

15.0 minute analysis by Stockfish 9 v010218

Mar-25-18  Olavi: <Also after 25. Rd5, Houdini indicates Black actually had an escape via the move 26. .. Rd7!:>

This was indicated by Polugaevsky in Grandmaster Performance. (27.Rf2!? or 27.Qg8+)

25.Rd5 he punctuates !!?? After 25.Be6 he gives 25...Qc5+ 26.Kh2 Bxf1, but gives the impression that black survives (not only mate-wise). Instead he recommends 25.Bxf6 Bxf6 26.Rd5. (The same a move earlier, 24.Bxf6)

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