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Later Kibitzing> |
| Jul-15-09 | | agb2002: <TheBish: ...
C) 47...f5 (best try, but still losing) 48. exf5+ Kf6 (other king moves lose quickly, e.g. 48...Kf7 49. Qxd4 exd4 50. Rxd7+ Ke8 [50...Kf6 51. Rf7#]
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47...f5 48. exf5+ Kf7 49. Qxd4 exd4 50. Rxd7+ Kf6 51. Rf7+ Ke5. |
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| Jul-15-09 | | gofer: 47 Qg4! (threatening to win the exchange on d7, but if the Bishop moves the Rg7#! Also the white king is complete safe from potential stalemates as the black queen can't easily get to c1) Option 1
47 ... Bxg4
48 Rg7+ Kh5
49 hxg4+ Kh4
50 g3#
Option 2
47 ... h5
48 Rxd7 (threatening to win the exchange)
48 ... hxg4
49 Rg7+ Kh6/Kh5
50 Rh7+ Kg6
51 Rag7#
Option 3 (the main line)
47 ... f5
48 exf5+
48 ... Kg7 49 Rxd7+ Rxd7 50 Rxd7+ Qxd7 51 f6+ winning the queen 48 ... Kf7 49 Qh5+ Ke7 (not Kf8 as 50 Qh6+ and then Ra8+ mating, not Kg7/Kg8/Kf6 50 Qg6+ and then Ra8+ mating) 50 Qxh6 black resigns, white is threatening mate everywhere that black tries to run!!) 48 ... Kf6 49 Qh5 black resigns (Be8/Be6/Bc6/Bc8 50 Rf7+ mating, Bxf5 or Kxf5 50 Qf7#, Rd6 Qg6+ 51 Qg7+ ... 52 Ra8+ mating, Qd5 50 Qg6+ Ke7 51 Qg7+ Qf7 (best option) 52 Rxd7 winning the queen) 48 ... Kh7 49 Qh5 black resigns (Qd5 (trying to block Ra8 and Qf7) 50 Qg6+ Kh8 51 Rc8+!!!! mating) Time to check! |
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| Jul-15-09 | | gofer: Nice of Speelman to play it out to the finish!
:-) |
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| Jul-15-09 | | mig55: 
click for larger viewGame Hautot-Laurent Belgian Championship. White plays Re7 and wins but there was a better move |
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| Jul-15-09 | | mig55: Sorry he played Ne7... |
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| Jul-15-09 | | BraveUlysses: Hmm, 47.Qg4 gives a pretty mate if the sac is accepted, declining it still loses for black, eventually. Resigning was probably the best option: 47...h5 48.Rxd7 Rxd7 (hxg4? and the rooks mate on the 7th rank) 49.Qxd7 Qxd7 (else mate soon by the Q and R on the 7th rank) 50.Rxd7 and wins 47...f5 48.exf5+ (Qxf5+? Bxf5 and black wins easily)
48...Bxf5 49.Rg7+ Kf7 50.Ra7f7+ Ke6 51.Qxf5+ and wins 48...Ke6 (48...Kxf5? Qf7#) 49.Qh5 e4! 50.Qg6+ Ke5 51.Qg7+ Kxf5 52.Rxd7 Qb8+ gives counterplay but white should still win |
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| Jul-15-09 | | bougre: Funny to see that Qg4 at move 46 doesn't work, because of 46... Qxb7. This explains the important intermediate move 46. Rc7 |
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| Jul-15-09 | | David2009: <mig55: Game Hautot-Laurent Belgian Championship. White plays Re7 and wins but there was a better move> Pretty mate, thanks |
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Jul-15-09
 | | Peligroso Patzer: <Pawnage: If 47...h5 then 48 Qf5+ is meaaaan.> Indeed. Those still posting lines with another 48th moves for White after a hypothetical 47. ... h5 are missing the point. A sample line: 47. ... h5 48. Qf5+ Bxf5 49. Rg7+ Kh6 50. Rh7+ Kg6 51. Rag7#. |
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| Jul-15-09 | | zb2cr: 47. Qg4 brings the point home. The Black Bishop is attacked three times, defended only twice. However, it can't move away--47. ... Be8?? is met with 48. Rg7#. 47. ... Bxg4; 48. Rg7+, Kh5; 49. hxg4+, Kh4; 50. g3# is the main line of the sacrifice. If Black tries 47. ... h5; 48. Rxd7, hxg4; 49. Rg7+, Kh5; 50. hxg4+, Kh6; 51. Rh7+, Kg6; 52. Rag7# looks to be a simple win. |
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| Jul-15-09 | | ounos: This was beautiful. Easy indeed, only took a couple of moments, but still, this is highly unique pattern to at least what I've seen around, not your typical run-of-the-mill trick. Thanks <chessgames> for bringing this to our attention. |
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| Jul-15-09 | | randomsac: I saw it today. After Qg4, black is at a loss of what to do. The bishop is overloaded, and taking the queen leads to the nasty mate in the game. Good play to close the deal. |
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| Jul-15-09 | | moex: Hello! I've just registered to CG.. In fact, I was so happy I hit today's puzzle, that I decided to tell you :D Well, first of all, congratulations for the CG site and for your comments.. one has much, much to learn from them! Btw, as a beginner (a very beginner) I've a question I would like to make to you (although not directly related to this specific puzzle).. I've always thought that there was no real difference between playing white or black. However, also looking at puzzles and games published in CG, it seems that most of the time it's the white that ends up winning.. Sorry for this stupid consideration, but I've been counting all game results of the last puzzles for a long time, and that seems to be true (unexpectedly for me)
Cheers! |
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| Jul-15-09 | | geeker: Whew. After an embarrassing failure yesterday, I saw the whole line today. |
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| Jul-15-09 | | johnlspouge: Wednesday (Medium/Easy)
P Scheeren vs Speelman, 1983 (47.?) White to play and win.
Material: R for B. The Black Kg6 has 4 legal moves. The White battery Ra7 and Rc7 x-rays 3 of the legal moves through Bd7, which is pinned to a mate threat: 47.Rg7+ Kh5 48.Qg4#. The White battery also burdens Black Qb5 and Rd4 with defense of Bd7. The position therefore suggests bringing another attacker to bear. The White Kh2 is secured from check. Candidates (47.): Qg4
47.Qg4 (threatening 48.Rxd7)
(1) 47…f5 48.exf5+ Kf6 [Bxf5 49.Rg7+ Kf6 50.Raf7+ Ke6 51.Qxf5+] 49.Qh5 (threatening 49…Bxf5 [or Kf5] 50.Qf7#)
With Pf5 therefore immune, White also threatens
50.Qg6+ Ke7 51.Rxd7+ Qxd7 [Rxd7 52.Qe6+ Kd8 53.Qg8#] 52.Rxd7+
White now plays 53.Qxe5 and wins a Q+2P vs. R endgame. Black has no feasible defense. (2) 47…Bxg4 [else, drop Bd7] 48.Rg7+ Kh5 49.hxg4+ Kh4 50.Rh7 [or Rg6] (threatening 51.Rxh6#
Black cannot prevent mate, even with 50…Qe8.
<[The game variation 50.g3# is of course a faster mate.]> |
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| Jul-15-09 | | beenthere240: <moex> The advantage of moving first is not insubstantial. Not quite like having the serve in tennis, but close. |
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| Jul-15-09 | | jsheedy: 47. Qg4! threatens to win the bishop or checkmate. If 47…Bxg4, 48. Rg7+, Kh6, 49. hxg4+ (or fxg4+), Kh4, 50. g3#. Let’s see if this is right… |
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| Jul-15-09 | | JG27Pyth: boringplayer:<I believe just capturing with 48. hg4 also wins.> Yes. after hg4 Black has no good way of preventing Rg7# -- one variation is...
48.hxg4 f5?
49 exf5+ Kf6
50.Rf7# |
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| Jul-15-09 | | backrank: This one ist really nice! But easy?
I looked at it in the morning after getting up, and I could see absolutely nothing ... now I looked at the position again, and found it immediately ... strange. |
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| Jul-15-09 | | Patriot: Initial candidates: Qg4,Rxd7
Thought process:
An initial "safety check" shows that 47.Qg4 is safe since 47...Bxg4 48.Rg7+ Kh5 49.hxg4+ Kh4 50.g3# so it passes as a possible good candidate. 47.Rxd7 Rxd7 looks terrible.
So let's try Qg4 and if that doesn't work then I'll look for another candidate. But right now this move looks very strong so I won't look for anything else just yet. 47.Qg4
A) 47...Bxg4 48.Rg7+ Kh5 49.hxg4+ Kh4 50.g3# as in the "safety check" line above. B) 47...h5 48.Rxd7 hxg4 49.Rg7+
B1) 49...Kh5 50.hxg4+ Kh6 (50...Kh4 51.g3#) 51.Rh7+ Kg6 52.Rag7# B2) 49...Kh6 50.Rh7+ Kg6 51.Rag7#
C) 47...f5 48.exf5+ Kf6 and what next?
I'm choosing Qg4 as the move although I don't know exactly what happens in variation (C). ---
It turns out that variations (B1) and (B2) can be treated the same way: 50.Rh7+ Kg6 51.Rag7#. I only found a more complex route. In variation (C) I didn't consider 49.Qh5 but thought this was black's best defense. |
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| Jul-15-09 | | remolino: What a beautiful problem. First tried to force queen to unprotect bishop, did not work. Then realized bishop could not move or king would be in major danger. Last, it became evident on need to activate queen. Thus: 47.Qg4!! BXg4 (otherwise bishop is lost and king danger continues), 48.Rg7+ Kh5, 49.hxg4+ Kh4, 50. Rh7 followed by mate.
Time to check. |
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| Jul-15-09 | | sileps: The black bishop is preventing a devastating rook-attack, but there is a way to deflect it: 47. Qg4! ..Bxg4 (if black avoids capture then 48.Rxd7 as black has no other piece to defend the d7-square). 48. Rg7+ ..Kh5 (only legal move)
49. Hgx4+ ..Kh4
50. g3#.
3/3. I spent way too long obsessing over 47.h4 and various other pinned pawn-combinations.. |
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| Jul-15-09 | | PinnedPiece: My Wednesday goal to solve: 5 minutes (hoping to lower that eventually). At about 3 minutes of studying the position I came to the conclusion that I really wanted that black Bishop out of my way. Spent some time trying to find ways of deflecting its protectors. Then discovered a direct confrontation by her Majesty on g4 would do it. Drive the king right into my pawns after the sac, with rook check. Committed to the move before time expired. Personal Result: Success!!
(Wed Success Rate moving up to about 12%) |
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| Jul-15-09 | | dzechiel: <I've always thought that there was no real difference between playing white or black.> Between players of equal strength, having the first move translates into 55% to 59% winning advantage (draws counting as a half a win and a half a loss). This is based on analysis done in the 1960's, the advantage is likely lower today. Between players of unequal strength, color make little difference. |
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| Jul-15-09 | | playground player: Driving the enemy King into a mass of pawns is a known method of achieving checkmate. Saccing the Queen to do it...congratulations! |
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Later Kibitzing> |
Kibitzing
sac: 47.Qg4