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| Sep-11-03 | | unclewalter: i bet dorfman was pretty surprised. |
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| Sep-11-03 | | mrvertigo: wow, that was a bad castle. And it seems that every one of these puzzles that happens in under 15 moves is easy. |
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| Sep-11-03 | | sarayu: why 8. gxf3 instead of 8. Bxf3 (8...Bxf3; 9. Qxf3), particularly when there is still a thought of castling on that side? |
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| Sep-11-03 | | sloukakos: am i missing something? why black wins after ... Bxf3 14. Bxf3???? |
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| Sep-11-03 | | Loschinski: @ sloukakos: after 14.Bxf3 Be5 white can't escape the threat 15...Qxh2# (without 13...Bxf3+ the move f4 would have defended) |
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| Sep-11-03 | | patzer2: Using Chess Informant's "Encyclopedia of Middle Games," (Krogius, Taimanov, Parma, Livsic) as a reference, I would classify the winning theme with 13....Bxf3 14. Bxf3 Be5 (with ...Qxh2# to quickly follow) as "Annihilation of Defense." Fred Reinfeld, using his 1001 "Winning Chess Sacrifices" as a reference, would probably have classified it as "Removing the Guard." The idea is black sees after white's 13. Kh1 that if he immediately plays 13...Be5, then white will be able to defend by playing the pawn on f4 to f5. Then black asks himself a question. Can I remove the defender on the next move and then play 14...Be5 later? He then visualizes the position again with the pawn removed and realizes the answer is yes! He sees that if he removes the defending pawn with 13...Bxf3, then white has no more defense left to stop mate after 13....Bxf3 14. Bxf3 Be5. So, he
"annihilates the defense" by "removing the guard" with 13...Bxf3! |
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| Sep-11-03 | | patzer2: Romanishin's decision to play 7...Nxf3+!? appears to be a crucial decision in this game. For he had to know that after 7...Nxf3+ 8. gxf3 Bh5 9. Bb5+ he would be forced to play 9...Kf8, losing his castling priviledges. Yet as I took the time to reflect on the possibilities in this odd position, I began to think black actually appears to have the better of it. After 9...Kf8, black's king is safer from a white king-side attack than he might be by normal castling. And black will be able to easily develop his king-side rook and knight, since white must struggle and waste tempo to keep black from using his bishops to demolishing his already weakened pawn structure. Of course white should not have played the cavalier 13. Kh1?? as 13. f4 was required, even though black looks fine and white's pawn structure is wrecked after 13. Bxc6 bxc6 14. Bxe2 Qxe2. |
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| Sep-11-03 | | SicilianDragon: Sloukakos, the win is easy to miss because one move, the f-pawn can go to f4, however, the Bishop now blocks it. |
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| Sep-12-03 | | Calli: I thought white had the better game until Kh1??. If he plays 13.Nb5 instead, he is one with the attack. Threatens 14.Nxc7 and 15.Qd6+ or 15.Ne6+ Black seems behaind in development and a bad king position. |
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| Sep-12-03 | | patzer2: <Calli> The move 13. Nb5 doesn't work. Black wins after 13. Nb5 Bxf3+ 14. Bxf3 [14. Kg1 Qg3+ 15. Kh1 Qg2#] 14. ...Be5 15. Bf5 [15. Nxc7 Qxh7# or 15. Qxd6+ cxd6] 15. ...Bxf5 16. h3 Qxh3+ Kg1 17. Qh2#. |
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| Sep-12-03 | | Calli: <Patzer2> You may have the wrong position set up. The white king is on g1 after 13.Nb5. Therefore, Bxf3 is not check. Its a major difference because at g1 the king can escape via f1. Black is left with a two piece attack that fizzles out. Something like: 13.Nb5 Bxf3? 14.Bxf3 Be5 15.Re1 Qxh2+ 16.Kf1 and White should win |
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| Sep-22-03 | | patzer2: <Calli> You are correct, I did have the wrong position (King on h1 instead of g1). As you point out, 13. Nb5 Bxf3? Bxf3 Be5 15. Re1 Qxh2+ 16. Kf1 wins for white. According to Fritz 8, after 13. Nb5 Qe7 14. Nxa7 Kf7 15. c3 Nf6 16. Nb5 Rhd8 17. Re1 c6 18. Na3 d5 19. e5 the position is level (0.12 @15/46 ply & 681 KNs). Still 13. Nb5 with a slight initiative is a big improvement for white over the losing 13. Kh1. |
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| Sep-22-03 | | Calli: <Patzer2> Looks good. Its really a comic/tragic position. White can make almost any move and be at least equal. Instead he reaches out and moves Kh1 as though he is trying to help Black win. |
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| Mar-19-08 | | JimmyVermeer: Castling wasn't Dorfman's main mistake. His biggest mistake was Kh1 on his 13th move. The ending is 13 Kh1 Bxf3+! 14 Bxf3 Be5 15 Qxd6+ cxd6 16 Bh6+ Nxh6 17 h3 Qxh3+ 18 Kg1 Qh2# |
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| Jul-19-12 | | Wyatt Gwyon: Nice Wednesday puzzle. |
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| Jun-10-15 | | clement41: Awesome tactical finish! |
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Mar-23-16
 | | Phony Benoni: Well, let's see. Take on c3 to undermine the e-pawn? Hardly. Howw about 13...Be5 threatening mate? Naw, 14.f4 is fine. But wait. If we can replace the pawn with a piece that can't move forward, like say a bishop. So <17...Bxf3+ 18.Bxf3 Be5, and now that's progress. |
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Mar-23-16
 | | Penguincw: Wednesday puzzle, shouldn't be too hard. And yeah, I got it. 13...Bxf3 takes away the f4 pawn, which could block the mate threat after 14...Be5. Looking at e8, white can delay mate for quite a bit: 15.Qxd6+ cxd6 16.Bh6+ Nxh6 17.h3 Qxh3+ 18.Kg1 Qg2# 0-1. That moment when you miss a Monday and Tuesday puzzle, but you get the Wednesday puzzle. |
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| Mar-23-16 | | dfcx: If black could play either Bxf3 or Be5, white would be mated. But Be5 is refuted by f4, so taking out the defender is the move. 13...Bxf3+ 14.Bxf3 Be5 and there is no defense against Qxh2# next. |
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| Mar-23-16 | | Cheapo by the Dozen: Seems Tuesdayish to me -- one clever move (remove a possible interposer with tempo), as part of short and totally forcing line. |
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| Mar-23-16 | | agb2002: The material is identical.
White's weakest point is h2. However, 13... Be5 is met with 14.f4. Hence, 13... Bxf3+ 14.Bxf3 (14.Kg1 Qg4#) 14... Be5 and mate in four. |
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| Mar-23-16 | | stst: One variation:
13.............Bxf3
14.Bxf3 (if not, Kg1 is forced, then 14......Qg4#)
.....Be5
15.Bf4 Qxf4
16.Kg1 Qxh2#
Mate is achieved only if f4 wont be blocked by the f3-pawn. |
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| Mar-23-16 | | Cybe: 13. Kh1 is one of the few moves, that lose. White can: 13. Nb5, 13. f4, 13. Qd2, 13. ... |
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| Mar-23-16 | | sfm: Cute, walking into a helpmate. The demobilization of the white f-pawn reminded me of that famous Fischer-Benko game
Fischer vs Benko, 1963
In this game, well, 13.f4 seems to be worth considering. |
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| Mar-23-16 | | ndg2: Classical motive: interference of f pawn by the decoy sac on f3. Once the bishop blocks the f pawn, Be5 is deadly. |
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