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< Earlier Kibitzing · PAGE 2 OF 3 ·
Later Kibitzing> |
| Jun-02-09 | | 2ndNature: I couldn't get 23.Bxh7+ to work, and 23.Qh4 didn't work either (23...Nxd3). So I thought: "get rid of the Night with 23.Rxc5" - and the rest just followed. |
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| Jun-02-09 | | CHESSTTCAMPS: Material is even and both sides are fully developed, but black suffers from an under-defended kingside castled position. The placement of white's queen seems to suggest a combination aimed at g7, but this is a bad mistake, e.g. 23.Be5? f6 24.Bxf6 Nxd3 actually wins for black due to white's back-rank problem. Similarly, 24.Bh6? f5 25.Qg5 Nxd3 wins for black. Instead, 23.Rxc5! wins a piece for white, because 23...Rxc5 is demolished by 24.Qh4, creating a double threat of 25.Qxd8+ and mate-in-two starting with Qxh7+, where white's advanced d-pawn is the deciding factor. A good illustration of the necessity of analyzing specific consequences of moves instead of relying on looks or intuition. |
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| Jun-02-09 | | The Rocket: Wow i missed an easy! |
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| Jun-02-09 | | The Rocket: I guess the comfort one can have in failing to find this easy kombination is that gm speelman also missed it: |
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| Jun-02-09 | | The Rocket: average joe how can a chess engine tell you that its medium level difficulty? |
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Jun-02-09
 | | pittpanther: I was going to play 23. Qh4 and then 24. Rxc5, is there any reason you cannot go in that move order? |
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| Jun-02-09 | | crafty: 23. ♕h4 ♘xd3 24. ♖c7 ♘xf4 25. ♖xb7 ♘e2+ 26. ♔f1 ♗xb7  (eval 1.35; depth 16 ply; 500M nodes) |
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| Jun-02-09 | | agb2002: White has the bishop pair against B+N. Black threatens to simplify the position with 23... Nxd3 but his pawn on h7 is defenseless. If White can force another weak spot then the queen may fork them. Therefore, 23.Rxc5: A) 23... Rxc5 24.Qh4
A.1) 24... <any rook move> 25.Qxh7+ Kf8 26.Qh8#. A.2) 24... f5 (or 24... g6; 24... h6 25.Qxd8#) 25.Qxd8+ + -. A.3) 24... f6 25.Qxh7+ Kf8 (25... Kf7 26.Bg6+ Kf8 27.Qh8#) 26.Qh8+ (26.Bg6 e5) Kf7 27.Qxd8 + -. B) 23... f5 24.Rxc8 fxg4 (24... Rxc8 25.Qg5) 25.Rxd8+ Kf7 26.Rc1 (trying 27.Rc7+) B.1) 26... Kf6 27.Rf8+ Qf7 28.Rxf7+ + -.
B.2) 26... Qd5 27.Rc7+ Kf6 28.Rf8#.
B.3) 26... Bc6 27.Be4 Bxe4 28.Rc7+ Kg6 29.Rxb7 Bxb7 30.d7 + -. |
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| Jun-02-09 | | mindmaster: Damn I missed it completely.....I complicated myself with a lot of superfluous variations....A good one for Tuesday... |
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| Jun-02-09 | | Stormbringer: Sign me up for the I missed it crowd. I looked at a variety of things, but settled on 23 Bh6, g6. 24 Qd4. |
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| Jun-02-09 | | FrogC: I would certainly have missed this over the board. Got it here because it's basically the same idea as the puzzle I missed yesterday. |
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| Jun-02-09 | | awfulhangover: I'm not a good puzzle solver , so why I thought yesterdays and todays puzzle both were very easy, I really don't know. |
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| Jun-02-09 | | Babar47: Once again went in the completely wrong direction with 23.Bh6 |
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| Jun-02-09 | | randomsac: I was looking at
Bxh7...Kxh7
Qh4+...Kg8
Rxc5
It's not as good as the solution to the puzzle, but it does leave white a passed pawn up. |
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| Jun-02-09 | | johnlspouge: Tuesday (Easy):
V Tukmakov vs Speelman, 1994 (23.?) White to play and win.
Material: B for N. The Black Kg8 has 2 legal moves, both on the back rank. The White Bd3 and Bf4 attack the K-position along adjacent diagonals. The White Rc1 and Rd1 have adjacent open files, with Bd3 able to discover an attack on Bd5. The White Qg4 attacks Pg7 and eyes Rc8 through Pe6. The White Pe6 cramps the Black position, controlling e7 and being able to advance to d7 to attack Rc8. The Black Rc8 is burdened with protecting Nc5. The White Kg1 is vulnerable to back-rank mates, but is secured from checks. Candidates (23.): Rxc5
23.Rxc5 Rxc5 [else, drop a N]
The Black Rd8 is now loose.
24.Qh4
(forking with the threats 25.Qxd8+ and 25.Qxh7+ Kf8 26.Qh8#) The threats leave Black down at least a N (and probably worse), but the alternatives are no better. (1) 24…f6 25.Qxh7+ Kf8 [Kf7 26.Bg6+ Kf8 27.Qh8#]
26.Bg6 (threatening 27.Qh8#)
Black avoid immediate mate only by sacrificing excesses of material after 26…Rxd6 27.Bxd6. (2) 24…Rxd6 25.Bxd6
(forking again with 26.Bxc5 and 26.Qxh7+ Kf8 27.Qh8#) Black has no time to save Rc5 and will be down at least R+N to P. |
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| Jun-02-09 | | johnlspouge: Hi, <MaxxLange>. Thanks for your post yesterday on V Gashimov vs Kramnik, 2009 explicitly pointing out the common conundrum (1) "take and then fork" or (2) "fork with a threat against the K". Yesterday, I instinctively did not bother to look at the "take and then fork" possibility in the puzzle. Your post made me aware of the need to be conscious of my choice. Today, it was not immediately clear that the "fork with a threat against the K" option included a deadly threat (although it does). As <CHESSTTCAMPS> points out, the position requires some calculation. And as <MostlyAverageJoe> points out, the puzzle is good Wednesday material. Let me join the "welcome back" chorus, <MAJ>. |
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| Jun-02-09 | | Patriot: An "easy" puzzle--right folks? LOL. This wasn't easy at all in my book because there were a number of forcing lines to consider. 23.Bh6 went to the top of my list of candidates. For example, 23...g6 24.Rxc5 Rxc5 25.Qd4 wins a piece (not 23...g6 24.Qd4 e5!). I finally realized 23...g6 is a mistake anyway (23...f6 is the move). I eventually ruled out other forcing lines before considering 23.Rxc5 Rxc5 24.Qh4. This threatens to mate several ways or win a piece. |
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| Jun-02-09 | | Marmot PFL: Lots of candidate moves here. Took several miuntes to find the right sequence, even with yesterday's solution as a clue. I lookes at several slower lines, but 25...f5 refutes most of them, hitting the WQ and defending g7. |
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| Jun-02-09 | | JG27Pyth: I had Qh4 first (wished I'd read the take and fork, v fork threat n take post Johnlspouge mentions) ... what is Black's best defense after Qh4? |
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| Jun-02-09 | | JG27Pyth: Is it just f6, and I get the h pawn consolation prize -- hey, thanks for playing here's a pawn... |
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| Jun-02-09 | | Patriot: <JG27Pyth: I had Qh4 first (wished I'd read the take and fork, v fork threat n take post Johnlspouge mentions) ... what is Black's best defense after Qh4?> 23...Nxd3 looks like a good start. No mate threat and the knight isn't hanging anymore. |
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| Jun-02-09 | | beenthere240: Two puzzles in a row with quiet or at least semi-quiet key moves -- ie non-capture, non-check moves. |
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| Jun-02-09 | | WhiteRook48: what the...? |
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| Jun-02-09 | | CHESSTTCAMPS: <Patriot> regarding the candidate 23.Bh6 <..I finally realized 23...g6 is a mistake anyway (23...f6 is the move).> 23...f5 may be stronger, but there is no definitive refutation as I claimed in my first post. |
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Jun-02-09
| | doubledrooks: While various threats or attacks upon the black king look promising, the winning shot is 23. Rxc5. Now if 23...Rxc5, white launches a double attack with 24. Qh4, threatening the black Rd8 and mate after 25. Qxh7+ Kf8 26. Qh8#. And after 23. Rxc5 f5, both 24. Qh4 and 24. Rxc8 look good to me. I went with 24. Qh4 as it seems simplest. |
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< Earlier Kibitzing · PAGE 2 OF 3 ·
Later Kibitzing> |
Kibitzing
sac: 23.Rxc5