|Dec-07-17|| ||Defiant Knight: Once you know there's a tactic, 32.Nxf6 is the first move which occurs to you; no doubt Hort had seen it several moves before however|
|Dec-07-17|| ||patzer2: For today's Thursday puzzle (32. ?), I successfully played guess-the-move against Black's stubborn resistance for the first seven moves of White's winning combination. However I deviated on the eighth move of the combination, which was also the last move of the game.|
Instead of 38. Qxe5+ +- (mate-in-14, Stockfish 8 @ 38 ply), I picked the obstruction 38. Bc6 +- (mate-in-27, Stockfish 8 @ 27 ply) which also clearly wins.
P.S.: Black's game takes a turn for the worse with 24...bxa4? allowing 25. f4 =/- to +- (+1.71 @ 29 ply, Stockfish 8) with a strong attack against the weakly protected castled king.
Instead, 23...Rae8 = (-0.02 @ 27 ply, Stockfish 8) brings a piece of heavy artillery over to reinforce Black's Kingside and keep the position level.
|Dec-07-17|| ||stacase: 32.Nxf6 and White sacrifices the Knight for two Pawns and allows Her Ugliness to pay Black's King a social visit.|
|Dec-07-17|| ||patzer2: Admittedly off topic, but according to a recent article at https://en.chessbase.com/post/the-f...,
Stockfish 8 has been decisively beaten (28 wins, 72 draws and zero losses) by the revolutionary new program AlphaZero developed by Deep Mind-- a company founded by former Chess prodigy Demis Hassabis and owned by Google.|
The program is said to have learned Chess from the basic moves, without any information about master games, opening theory, strategy or tactics. AlphaZero progressed enough in only 24 hours of computer self-play learning and improvement to being capable of decisively beating Stockfish 8.
|Dec-07-17|| ||gofer: Well, in truth I missed this one. I wanted to play <32 Nxf6>, so in that respect I was correct,
but I missed best black's defence. I saw the queen check followed by Kh1, which didn't seem to
achieve much. I didn't think there was a decent defence! |
But, in hindsight, it was all very obvious... ...better luck tomorrow.
|Dec-07-17|| ||saturn2: Nxf6 cracks the nut.|
|Dec-07-17|| ||Once: <Defiant Knight: Once you know there's a tactic>|
I do indeed!
|Dec-07-17|| ||JonKing: Almost... I missed 35. Bxa4
Oh, the nice slow moves...
|Dec-07-17|| ||mel gibson: <Dec-07-17
Premium Chessgames Member patzer2: Admittedly off topic, but according to a recent article at https://en.chessbase.com/post/the-f..., Stockfish 8 has been decisively beaten (28 wins, 72 draws and zero losses) by the revolutionary new program AlphaZero developed by Deep Mind-- a company founded by former Chess prodigy Demis Hassabis and owned by Google.>
I don't know about that patzer.
I tried the position on that page which says
<In this position from Game 5 of the ten published, this position arose after move 20...Kh8. The completely disjointed array of Black’s pieces is striking, and AlphaZero came up with the fantastic 21.Bg5!! After analyzing it and the consequences, there is no question this is the killer move here, and while my laptop cannot produce 70 million positions per second, I gave it to Houdini 6.02 with 9 million positions per second. It analyzed it for one full hour and was unable to find 21.Bg5!!>
and my computer -DR4 64 bit - did over 100 million board combinations to depth 21
& found only a draw -
not a killer move as described.
|Dec-07-17|| ||Dionysius1: Don't know that I like correspondence chess puzzles. They're as different from over the board as chess studies are.|
|Dec-07-17|| ||whiteshark: According to CB Corr.Database this game has been played between |
[Event "EU-chT1 fin 10 corr"]
[Site "ICCF corr"]
<[White "Horton, Michael Howard"]
<[Black "Heilemann, Manfred"]>>
I think this needs further investigation - is there an ICCF crosstable?
|Dec-07-17|| ||patzer2: <mel Gibson> I see what you mean about that position. After 21. Bg5 f5 (diagram below)|
click for larger view
I'm only getting a draw with Stockfish 8 (0.00 at 36 ply). Wonder if the position was set up correctly or if our programs are missing something.
|Dec-07-17|| ||malt: <32.N:f6> Q:b6+ 33.Kh1 R:f6 34.Q:g5+ |
32.R:f6 (could be a better,
stopping ...Qb6+ )32...N:f6 33.Q:g5+
|Dec-07-17|| ||NBZ: What's the finish? My thought is Kf7 d6 Qd8 Be8+!|
|Dec-07-17|| ||mel gibson: <I'm only getting a draw with Stockfish 8 (0.00 at 36 ply). Wonder if the position was set up correctly or if our programs are missing something.>|
Yes - something very wrong there.
|Dec-07-17|| ||weary willy: At the end, I thought ... Kf7, Bc6 - black loses a piece if Qd8|
|Dec-07-17|| ||psmith: <patzer2>
I think you mean 37. Bc6, instead of 37. Qh5 -- not 38. Bc6, which allows Nxh5. right?
|Dec-07-17|| ||patzer2: <psmith> Thanks for the correction! What I meant to say was after correctly picking 32. Nxf6 and the next five moves, I deviated from the game on the seventh move of the combination with 37. Bc6 +- (mate-in-27, Stockfish 8).|
|Dec-07-17|| ||kevin86: The key was to remove the pawn at f6|
|Dec-07-17|| ||malt: 32.R:f6 prevents the black queen check (earlier post) 32...N:f6 33.Q:g5+ Kh8 34.N:f6 Rf7 35.Qh4+|
|Dec-07-17|| ||agb2002: White is one pawn down.
The natural moves (destruction of defense) are Nxf6 and Rxf6. In the case of 32.Nxf6:
A) 32... Nxf6 33.Qxg5+
A.1) 33... Kf7 34.Rxf6+ Ke7 35.Qg7+ wins.
A.2) 33... Kh7 34.Rxf6 Rxf6 35.Rxf6 Qg7 36.Qh5+ Kg8 37.Rg6 wins decisive material.
A.3) 33... Kh8 34.Rxf6 Rxf6 35.Rxf6 as above.
B) 32... Rxf6 33.Qxg5+
B.1) 33... Rg6 34.Rf7+ and mate soon.
B.2) 33... Kf7(8) 34.Rxf6+ Nxf6 35.Rxf6+ Ke8 (35... Ke7 36.Qg7+ and 37.Rf8#) 36.Qg8+ Kd7 37.Qg7+ Kc8 38.Rf8+ wins decisive material.
B.3) 33... Kh7 34.Rxf6 Nxf6 35.Rxf6 transposes to A.2.
B.4) 33... Kh8 34.Rxf6 Nxf6 35.Rxf6 transposes to A.3.
C) 32... Kg6 33.Rxg3
C.1) 33... Nxf6 34.Qxg5+ Kh8 (34... Kf7 35.Qg7+ and 36.Qxc7; 34... Kh7 35.Qh4+ Nh5 36.Qxh5#) 35.Rxf6 wins (35... Rxf6 36.Qxf6+ Kh7 37.Qh4#).
C.2) 33... Rxf6 34.Qxg5+ as above.
D) 32... Kh6 33.Rxg3 Rg8 34.Nxg8 wins decisive material.
|Dec-07-17|| ||Patriot: <agb2002> You missed 32...Qb6+ too! That wasn't even on my radar this morning.|
|Dec-07-17|| ||Henrychn: 37 Qh5+, Kg7. What is white's next move?|
|Dec-08-17|| ||Henrychn: I got it. Rxg4+|
|Dec-08-17|| ||agb2002: <Patriot: <agb2002> You missed 32...Qb6+ too!>|
I saw it immediately the first time I looked at the diagram but I don't know why I forgot it a few hours later when I found the time to write my post.