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Simon Kim Williams vs Aleksandar H Wohl
4NCL (2003), Telford ENG, rd 6
English Opening: Agincourt Defense (A13)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Given 6 times; par: 39 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Dec-08-04  be3292: <Crafty> -- what does the stuff in your parentheses mean?
Dec-08-04  Shubes82: I agree with Sneaky, the key line to see if the mating line. I agree that Ba3 wins at least the exchange, but Qa7 wins a piece outright. It is also more of a forcing line. Not to mention all the horrible moves by black throughout the game. 9)...Nd4, 10)...Qh4, and 20)...Qe7 are all suspect, especially the last of those. If nothing else, white is extremely active and has a well developed attack on the castled black king, while black has what?...two inactive bishops, rooks not working in unison and a weakened king. An easy win for white.
Dec-08-04  be3292: <Sneaky> Yes, of course, that was an immaculate conception on Si's part.
Dec-08-04  philidov: <be3292> Have a look here User Profile: crafty
Dec-08-04  simsan: <be3292:> The <eval> part is the computer's numerical evaluation of the current position. (+1.0 is usually equivalent to being a pawn up).

The word <ply> refers to the depth of the computer's search into future possible moves. 11 ply is 11 half-moves. At the fringe of each search tree, the computer normally adds up the numerical value of black's and white's pieces, and normally uses something like the minimax algorithm (http://en.wikipedia.org/wiki/Minimax) to determine the <eval> number.

<250M nodes> would in this case presumably refer to the 250 000 000 leaf nodes that have been evaluated in order to reach the numerical estimate given.

Dec-08-04  Novice713: 23. Na7+ uncovers White's bishop AND rook.
Dec-08-04  pawntificator: If crafty says so, 23. Qxb7 must be better, but I like 23. Nd4+ Kd6 24. Nf5+. You can still take the bishop in this line, but it adds a nice knight fork to insult and injury.
Dec-08-04  szyymek: also wins 22.Nd6+
Dec-08-04  pkjohn146: I thought Nd6 also and then RxB but that pawn capturing the knight would not be good. I got the first part, at least. OTB may have been more obvious.
Dec-08-04  blunderqueenagain: Has anyone looked at 21. Bg5? If 21 ... f6 then 22. Bxf6 Qxf6 23. Qa7+ Kc8 24. Nd6+. If 24. ... Qxd6 or cxd6 then 25. Qxb7#. If 24 ... Rxd6 then 25. Qxb7+ Kd8 26. Qb8#.
Dec-08-04  Nickisimo: My idea was 21. Qa7+ Kc8 22. Nd6+, with the threat of 23. Qxb7#, but I missed 22...cxd6, defending the bishop with the Queen.
Dec-08-04
Premium Chessgames Member
  cu8sfan: <Nickisimo> Check out my post above, we seem to think alike!
Dec-08-04  blunderqueenagain: Nickisimo and cu8sfan, I had the same idea, only I saw that cxd6 would kill the line. That's why I thought of playing 21. Bg5 first, to dislodge the queen from its defensive position. If 21. ... Qd7 then 22. Bxd8 Qxd8 and the line continues. If 21. ... f6 then 22. Bxf6 and black is in the same mess. Someone tell me if there's anything wrong with this.
Dec-08-04
Premium Chessgames Member
  cu8sfan: <blunderqueenagain> Thanks for your input and welcome to the kibitzers' gang! I like your handle, reminds me of my 60 memorable games... (-:
Dec-08-04
Premium Chessgames Member
  notyetagm: A nice pure checkmate results from 21 ♕a7+ ♔c8 22 ♕a8+!! ♗xa8? 23 ♘a7#.
Dec-08-04  CHEG: <blunderqueenagain>

What about?

21. Bf5 f6 22. Bxf6 gxf6

Dec-08-04
Premium Chessgames Member
  kevin86: This does a nice trick and more! Following 22...♗xa8 23 ♘a7# you have this:

1 a lowly knight gives the death blow from near the corner. 2 Two lines of attack are open-from the bishop and from the rook-fitting since a queen was sac-ed (a queen functions as a ROOK and a BISHOP)-thus the escape squares are covered. 3.black's C-pawn conspires against him,not only to block an escape but interferes with the queen's ability to capture the fatal knight.

Dec-08-04  catlover: I'm relatively new, but have been following everyone else's kibitzing for the last few months. Today I found out for the first time that crafty was a computer program!

All this time I thought he/it was a human running analysis with Fritz or something and posting it for everyone's benefit. Come to think of it, though, he did seem to be a man of few words...

Dec-08-04  blunderqueenagain: <CHEG> Yep, looks as if that effectively stops the Bf5 line. Thanks for the info.

Ah well, I really don't successfully solve the Wednesday puzzles that often. Monday and Tuesday, maybe, but I've got a ways to go before I can get the more advanced ones.

<cu8sfan> Thanks for the welcome! Yeah, I chose a moniker that's representative of the way I find myself playing often - that is, blundering my queen... again...

Dec-08-04  nosh: I found 22 Nd4 (instead of the queen sac). Looks like it's at least as good. Now black's best option to stop the mate appears to be 22 ... c6 and either 23 Bxc6 or Nxc6 leads to plenty of devastation with white coming out way ahead.
Dec-08-04  aw1988: <nosh> Yep, that seems to work.
Dec-08-04  alphee: <pawntificator:> this was my prefered solution and I left it there as I could not see any forced mate
Dec-08-04  alexandrovm: nice mate net!
Dec-08-04  EXIDE: The Queen sacrifice I did not see at all. Good move. I went with 21. Ba3.
Dec-08-04  Dave Murray: I missed this one, really nice puzzle.
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