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| Jan-20-18 | | agb2002: White has an extra pawn.
Black threatens Rxh6 and Qxb2.
The knight on e6 prevents Qg7#, the pawn on f7 stops its white colleague and Black's back rank looks weak. These details suggest 26.Rxe6 Rxh6 (26... Bxf6 27.Re8+ Nf8 28.Q(R)xf8#) 27.Re8+ Nf8 28.Bg7: A) 28... Qb4 29.Bxh6 followed by Rxf8+ seems to win a piece at least. B) 28... Be7 29.fxe7 Qb4 (29... Kxg7 30.exf8=Q#) 30.exf8=Q+ Qxf8 31.Bxf8 f5(6) 32.Bxh6+ wins decisive material. C) 28... Bxf6 29.Bxf8 Bg7 30.Bc5+ Bf8 31.Rxf8+ Kg7 32.R1xf7#. |
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| Jan-20-18 | | 11thHeaven: I've got to admit I'm confused by the name of the opening - where does the name "six pawns attack" come from? |
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| Jan-20-18 | | AlicesKnight: Found the first 3-4 moves in, not the whole thing. Black ahs to throw piece after piece to fend off mate. |
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| Jan-20-18 | | Mayankk: First move is simple and intuitive. Rest can be figured out while playing, should someone whisper into your ears that you are on the right track. But calculating all this before playing the first move... way beyond my pay grade. |
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| Jan-20-18 | | Olavi: <11thHeaven: I've got to admit I'm confused by the name of the opening - where does the name "six pawns attack" come from?> Nowhere, as far as this game goes. In the following white has moves six pawns by move ten, and there are games in the four pawns' where all of them are on the board by the time of h2-h4. >S Mariotti vs Gligoric, 1969 |
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| Jan-20-18 | | saturn2: After 25..Rh5 black might have been happy because he was supposed to win the bishop on h8, but.... I got the main idea but was not aware of 29..Bxh3 |
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| Jan-20-18 | | clement41: Fantastic fight and tactics! |
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| Jan-20-18 | | WorstPlayerEver: As has been said, it is impossible to run through all variations, but I figured out quickly White is at least +4 after 26. Rxe6 After the engine line 26. Rxe6 Rxh6 27. Re8+ Nf8 28. Bg7 Qc5 29. Bxh6 Bd7 30. Rxf8+ Qxf8 31. Bxf8 Kxf8 SF eval is +4.23 
click for larger viewI think that's an understatement :) |
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| Jan-20-18 | | morfishine: That sure was exciting! I had <26.Rxe6> forces 26...Rxh6 allowing <27.Re8+> forces 27...Nf8 allowing <28.Bg7> and Black is kaput but as it turns out, there's more to the story
***** |
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| Jan-20-18 | | malt: I Had
<26.R:e6> R:h6 27.Re8+ Nf8 28.Bg7 B:f6
29.B:f8 B:h3 30.R:a8
got stuck on 30...Bg7 31.c5? Bc8+
(31.Bc5+ Bc8+ 32.Kg1)
Maybe should have played 30.Bc5 R:e8
31.B:b6 Be6+ 32.Kg1 B:c3 33.N:c3 B:c4 |
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| Jan-20-18 | | ChessHigherCat: I must be missing a hell of lot but I just woke up and in 30 seconds I figured out 26. Rxe6 RxQ? 27. Re8+ Nf8 28. Bg7 aha, I see the plot thickens with 28...Be7. |
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| Jan-20-18 | | ChessHigherCat: Okay, Bxf6 not Be7??. greatly complicates matters. Why can't opponents learn to be cooperative? |
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| Jan-20-18 | | patzer2: <ChessHigherCat: Okay, Bxf6 not Be7??. greatly complicates matters. Why can't opponents learn to be cooperative?> I too got as far as 26. Rxe6! Rxh6 27. Re8+ Nf8 28. Bg7!, and found today's Saturday puzzle (26. ?) too complicated for me after 28...Bxf6 (diagram below).
click for larger viewHaving played too much bullet and blitz chess with my precocious 8-year-old Grandson, I found myself unable to resist the impulsive urge to take the "free Rook" with 29. Bxh6?? Unfortunately, after 29. Bxh6?? Bg7! -+ Black turns the tables and steals the win. Instead, White maintains a winning advantage with the game continuation 29. Bxf8! +-. After Black's reply 29...Bxh3, White must again resist the urge to grab material with the discovered check tactic 30. Bc5+? as White's decisive advantage evaporates after 30. Bc5+? Rxe8 31. Bxb6 Be6+ 32. Kg1 Be7 ⩲. Instead, White maintains the winning initiative by once again taking the lesser material with 30. Rxa8 +-. P.S.: Instead of 30...Rh5 31. gxh3 +-, Black could have posed a slightly difficult problem for White by playing 30...Bg7 (diagram below). 
click for larger viewHere, after 30...Bg7 (diagram above) can you find White's only winning move? Hint: It's not 31. Bc5+?? Bc8+! 32. Kg1 Qxc5+ -+. |
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| Jan-20-18 | | wtpy: Didnt consider black's 29...Bh3 but pretty obvious response that I found quickly. Pretty easy for a Saturday. The toughest problem for me this week was on Wednesday finding black's Bd3. 6/6. |
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| Jan-20-18 | | wtpy: Patzer2 31 c5 looks like best. One sample line I like is 31..Qb2 32 Bd6 Bc8 33 Kg1 f6 (to walk king out of dark square rook and bishop windmill) 34 Bb1,getting the light squared bishop into the game with decisive effect. |
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| Jan-20-18 | | wtpy: It is interesting that this week we have had two problems where a piece moves delivering discovered check and simultaneously blocking the back rank features prominently in the solution. |
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| Jan-20-18 | | patzer2: <wtpy> You got it! After 30...Bg7, White's only winning move is 31. c5! which leaves Black with what I like to call "discovered nothing." After 30...Bg7 31. c5!, Black has nothing better than 31...Bc8+ 32. Kg1 Qb4 33. Bd6 Bd4+ 34. Rf2 Bxf2+ 35. Kxf2 Kg7 36. Rxc8 +- (+7.60 @ 32 ply, Stockfish 8) 
click for larger viewwhen (diagram above) White's four minor pieces (3 x 4 = 12) are apparently worth far more than my count of two pawns plus for Black's Queen and extra pawn (9 + 1 = 10 and 12 -10 = +2). White's win here is probably trivial for a computer. However, after 36...Rh5 is played in the diagram above, scoring the full point doesn't look like such a simple task for a human player. |
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| Jan-20-18 | | wtpy: Patzer2,I didn't consider Qb4 followed by Bd4,and this line creates one last tactical pitfall; if after 33..Bd4 34 Nd4 black has 34..Qd4. 35 Rf2 is forced and after Rh1+ white's advantage has vanished, confirming your assertion that very accurate play is necessary to garner the full point. |
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| Jan-20-18 | | Patriot: I got it thru 29.Bxf8 but calculated 29...Bg7 and 30.Bc5+ (good enough) or maybe 30.Be7+ Bf8 31.Bxf8. I didn't consider 29...Bxh3 as a defense. 26...Bxf6 27.Re8+ Nf8 28.Rxf8#
26...Nxf6 27.Qg7#
There isn't much here for defense but 29...Bxh3 was a nice try. |
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Jan-20-18
 | | Breunor: Patzer 2,
My guess is that after 30 ... Bg7 white should play 31 c5 stopping the mate threat after black moves the bishop from h3 - but it still seems wildly complex. 31 c5 and then maybe Bc8 ch 32 Kg1 Qc7 33 Bd6 Qd8 34 Bb3 is a possible line here but there are a lot of variations. However 31 c5 feels like the right move. |
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| Jan-20-18 | | njchess: This game reminds of game between Donald Byrne and Bobby Fischer, where after a minor inaccuracy from Byrne, Fischer sacks his queen, but gains a rook, two bishops and a pawn in the exchange. The game move 26. Rxe6 is easy enough, but the ensuing carnage is a little more difficult to reason out. I managed to see that White would get 2 knights, 2 bishops and a rook for his queen and 2 pawns. White's king might be a bit precarious, but otherwise, he is definitely better off. |
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| Jan-20-18 | | ChessHigherCat: <Having played too much bullet and blitz chess with my precocious 8-year-old Grandson, I found myself unable to resist the impulsive urge to take the "free Rook" with 29. Bxh6?? Unfortunately, after 29. Bxh6?? Bg7! -+ Black turns the tables and steals the win. Instead, White maintains a winning advantage with the game continuation 29. Bxf8! +-. After Black's reply 29...Bxh3, White must again resist the urge to grab material with the discovered check tactic 30. Bc5+? as White's decisive advantage evaporates after 30. Bc5+? Rxe8 31. Bxb6 Be6+ 32. Kg1 Be7 ⩲.> Good illustration of the principle of "delayed matification". |
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Jan-20-18
 | | Jimfromprovidence: A worse move than 31 Bc5+, namely Be7+.
click for larger view |
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| Jan-20-18 | | wtpy: Just noticed the game says Marat Khassanov but the puzzle diagram says Khalifman. |
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| Jan-21-18 | | patzer2: Black's game takes a slight turn for the worse with the passive retreat 13...Nf8?! allowing 14. Rad1 ⩲ (+0.50 @ 29 ply, Stockfish 8). Instead, Black could have held it level by developing with 13...b6 = (0.00 @ 31 ply, Stockfish 8). |
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