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Tomas Cagasik vs John Brooke
Olomouc FIDE Cup (2007), rd 4, Aug-04
Pirc Defense: General (B07)  ·  1-0


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sac: 22.Qxh7+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Premium Chessgames Member
  whiteshark: ... his best pieces of the board nick and him splash with grease and sauce, they bones shall it get stuck in the neck!
Jul-06-15  stacase:

White needs to say check, or defend against Black's attack. There's only one piece that can do it and we know who she is. The rest plays itself.

Jul-06-15  TVik: @morfishine:
Can't black improve with 23. ...Bxh6 in your second line? How does white continue?
Premium Chessgames Member
  Oxspawn: If playing this game I would have described it as very nervy rather than very easy. Whoever plays next wins (black Qc2 and then to b2). Tempting therefore to go defensive. But since it is POTD and Monday, the tension is released.

22. Qxh7+ Nxh7
23. gxh7# (the white bishop covering g7 and h8)
Could black have survived with 21 fxg?

Jul-06-15  saturn2: As a newbie on this site it is amusing how many errors occur in the posts: morfshine, Exide and me overlooking that the h6 square is covered by the black bishop. Oxspawn overlooking that b2 is covered by the white bishop.
Jul-06-15  stacase:

Oops, I said there's only one piece that can say check. Uh no, the g6 pawn can, but it doesn't work out.

Jul-06-15  stacase:

Uh yeah I think 22. g6xh7+ does work out.

Jul-06-15  CHESSTTCAMPS: White is up 2 pawns with a strong attack on the open h-file. Black also has activity near the enemy king, staking hopes on 22.bxa4?? Qf1# However, white can force mate with 22.Qxh7+ Nxh7 23.gxh7#
Jul-06-15  morfishine: <saturn2> Indeed but that happens when one only eyeballs the position; Hopefully one will learn and move on
Jul-06-15  moodini: My alternative line where the queen lives is: 22. gxh7+ Kg7 23. h8Q+ Rxh8 24. Qxh8+ and Qxf6#
Premium Chessgames Member
  Penguincw: (flips over computer)

I didn't get it right. I got 22.gxh7+ (22...Nxh7 23.Qxh7# 1-0) Kg7 23.Qh6+?? Bxh6.

It turns out, 22.gxh7+ does work, but after 22...Kg7 23.h8=Q+ (which I saw, but dismissed) Rxh8 24.Qxh8+ Kg6, and only OTB, I would've seen 25.Qxf6# 1-0.


Premium Chessgames Member
  Oxspawn: <saturn2>: Not so much <amusing> as tragic. Actually, I did not overlook it - I underlooked it. <morfishine> <Hopefully one will learn and move on>. But making the same mistakes every day is kind of comforting.
Jul-06-15  saturn2: @morfishine, Oxspawn:
I read once, that the most common mistakes in chess are the ones over(or under)looking that the other players pieces can move diagonally back.
Jul-06-15  ThunderFire234: <morfishine> In your second line can black not simply play 23... Bxh6?
Premium Chessgames Member
  patzer2: Speaking of errors, here's a correction:

After 16...Bh6+ (diagram below)

click for larger view

(17. ?) is a White to move and win position worthy of at least a Thursday or Friday puzzle.

The "obvious" 17. Kb1?? loses to 17...Bxa2+! 18. Kxa2 Nc3+! 19. bxc3 Qa5+ 20. Kb1 bxc3 21. Bc4 Rac8! 22. Qe2 Qa3 23. Bxc3 Rxc4! 24. Qxc4 Rb8+ 25. Qb3 Rxb3+ 26. cxb3 Qxb3+ 27. Bb2 Qxd1+ (-6.27 @ 22 depth, Deep Fritz 14).

Instead, White avoids the loss and secures a winning advantage with the forced self-pin 17. Rd2!, as played in the game.

After 17. Rd2! (diagram below), Deep Fritz 14 x64 analysis @ 22 depth assesses the position with Black to move (17...?) as winning for White:

click for larger view

1. (2.24): 17...g5 18.Nh3 Rb8 19.Nf5 Bxf5 20.gxf5 g4 21.Rg1 Re8 22.Nf2 Bxd2+ 23.Kxd2 d5 24.Nxg4 Nxg4 25.Rxg4+ Kf8 26.Rg8+ Kxg8 27.Qg1+ Kf8 28.Qg7+ Ke7 29.Bf6+ Kd6 30.Bxd8 Rbxd8 31.e5+

2. (2.32): 17...Bxd2+ 18.Qxd2 Rc8 19.Nf5 Bxf5 20.gxf5 b3 21.axb3 Nc5 22.Kb1 a5 23.hxg6 hxg6 24.fxg6

Premium Chessgames Member
  kevin86: A nice welcome back to queen- sac Mondays. Queen sac AND mate with pawn.
Jul-06-15  yadasampati: I love pawn mates: David defeating Goliath!
Jul-06-15  Harvestman: White never moves the kingside pieces, and yet wins anyway. That breaks every rule of development there is. It almost seems unfair.
Premium Chessgames Member
  Bubo bubo: Removing the defending knight with 22.Bxf6 looks tempting, but leads to disaster after 22...Qc1+.

The right way to remove that knight is 22.Qxh7+ Nxh7 23.gxh7#

Premium Chessgames Member
  Mating Net: <White never moves the kingside pieces, and yet wins anyway. That breaks every rule of development there is. It almost seems unfair.> That's a great point <Harvestman> White followed the pry open the h file, sac, sac mate formula perfected by an eccentric world champion.
Premium Chessgames Member
  Gregor Samsa Mendel: By prying open the h-file, the king rook was automatically developed without having to move, particularly as black had already castled kingside. This lack of development actually saved white time.
Jul-06-15  Pedro Fernandez: It is some curious that if white commits the mistake (which is quite unlikely) 22.Bxf6?? black wins by M13 (Stockfish).
Jul-06-15  Pedro Fernandez: But not so easy (please see puzzle diagram):
22.Bxf6?? Qc1+ 23.Ka2 Bxb3+ 24.Ka3 Qa1+ 25.Kxb3 Rb8+ 26.Kc4 Nxb2+ 27.Bxb2 Qa6+ 28.Kd5 Qb7+ 29.Kd4 Qxb2+ 30.Kd5 Qe5+ 31.Kc6 Qc5+ 32.Kd7 Rb7+ 33.Kd8 Bg5+ 34.Ke8 Qe5+ mate.

click for larger view

Jul-06-15  mel gibson: Amazing that white's Rook can't finish the King off
but the lowly white pawn can as it attacks on the diagonal.

That shows you that a pawn can have real power.

Jul-07-15  morfishine: <saturn2> I read the hardest moves to see, either planning your own or seeing your opponents threats, are sideways moves or threats along a rank. The easiest moves for the human brain to visualize are up a file and on the diagonal. Interesting
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