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Alexandre Dgebuadze vs Pieter Claesen
Belgian Championship (2005), Aalst BEL, rd 9, Jul-10
Philidor Defense: Philidor Countergambit (C41)  ·  1-0

ANALYSIS [x]

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sac: 17.O-O PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Aug-16-06  legi: After 17.0-0 ♕x♖ 18.♗b2 ♕a2 white can win the black queen with 19.♖a1 ♕x♖ 20.♗x♕ ♖e8. This looks similar to the game but with somewhat like an extra tempo for black. Instead 19.♕xb7! seems to win instantly.
Aug-16-06  Snaeulf: well, 17. Bb2 Re8+ 18. Kf1 Qe3+ 19. Kg1 Qe2 20. g3 (h3) Re7 Here black hasn't got troubles IMHO.
Aug-16-06  EmperorAtahualpa: Argh, of course! 17.O-O, somehow I assumed that White couldn't castle anymore! The only thing I could come up with 17.Ra2 because I was paying (too) much attention to 17...Re8+.
Aug-16-06  Chess Lou Zer: Another one I couldn't find.
Aug-16-06  Snaeulf: ehm.. <al wazir: 18.Qxe8+ Kxe8 19.Bxd4> better is crafty's line or eventually 18. Qe4+ Ke2 19 Qxg2 Rhg1 20 Qxf2+ 21 Ke3 Qf3+ Ke2 Qf2+ Kc3 Qe3+ Kc2 Qe2+ Kb3 Qd3+ Bc3 a5 looking for perpetual check
Aug-16-06  2ndNature: I didn't see 18.Qa2 Ra1! bugger.. yet I was convinced that 17.0-0 is the right continuation - anything else looked bad for White.
Aug-16-06  Kreifi: <OhioChessFan: I thought Bb2 was a little better than 0-0, but couldn't really work out Black's play for either line. I didn't expect Qxa1.>Bb2 was my choise also. But I knew it was wrong cause Qe4+ and white cannot castle.
Aug-16-06  Halldor: I started at once looking at 17.0-0 - simply because it's funny... (I didn't consider 18...♕x♖+ but saw that 18...♕a2 19.♕xb7 was very good for White, 19...♖e8?? 20.♗xg7#, etc.)
Aug-16-06  banjo: i've got it;
but i thought i was wrong.
i thought there must be more
then 17.00
Aug-16-06  Marvol: <EmperorAtahualpa: Argh, of course! 17.O-O, somehow I assumed that White couldn't castle anymore!>

Same feeling here... somehow the move 0-0 seemed impossible to me (didn't consider it at all), so I tried to sac the rook with Bg5 which obviously fails so I gave up. 0-0 is pretty obvious with hindsight.

Aug-16-06  YouRang: Well, I didn't see the 19. O-O line, but I did think that 19. Bb2 was an entirely playable answer to both of Black's threats: ...Qxa1 and ...Re8+.

And, given that this is "get out of trouble week", I thought it would be sufficient.

Aug-16-06
Premium Chessgames Member
  kevin86: I was looking at two rook sacs and when that fell through I saw a possible sac of R@a1 followed by a check by the bishop exposing the queen. By castling,in a way,both idea were used. White gave up both rooks for the queen---but had the winning attack.
Aug-16-06
Premium Chessgames Member
  InspiredByMorphy: Is this still white to play and win if black responds 17. ...Qb6 ?
Aug-16-06  alicefujimori: <InspiredByMorphy>17...Qb6 18.Qf5+ and Black is worse due to his exposed king. White's pieces will become very active with later ideas of Re1 and Bg5(if black plays Nf6) while Black's h-rook is still seriously out of play.
Aug-16-06
Premium Chessgames Member
  InspiredByMorphy: <alicefujimori> Your point of black's positional weakness has merit, but is subject to opinion upon whether it constitutes an advantage for white. The question I have is whether 17. ...Qb6 keeps black in the game, as from first glance this is a white to move and win puzzle.
Aug-16-06  alicefujimori: <InspiredByMorphy>I know what you wanted to say. This isn't really a good puzzle for a white to move and win IMMEDIATELY puzzle, but that does not mean that white doesn't win after 0-0.

Of course Black could struggle on after 17...Qb6. White's advantage after 17...Qb6 isn't really subject to opinion. It is a logical conclusion from the given factors of the position.

Aug-16-06
Premium Chessgames Member
  InspiredByMorphy: <alicefujimori> I respect your opinion, but in my opinion one can only conclude such things after analysis has been given.
Aug-16-06  alicefujimori: <InspiredByMorphy>Of course. I am not claiming that White is DEFINITELY winning after 17...Qb6. But it definitely looks advantageous to white. This isn't an opinion, it's a logical conclusion from the given factors of the position.
Aug-16-06  YouRang: <InspiredByMorphy> Puzzles are not always "X to move and win". Sometimes, it is "X to move and survive". In general, it is simply "find the best move for X".

Today's puzzle is a "White to move and survive", given Black's pair of threats: ...Qxa1 and Re8+.

In fact, <chessgames.com> announced on Monday that this whole week would be 'survival' situations. :-)

Aug-16-06
Premium Chessgames Member
  InspiredByMorphy: <YouRang> Thanks. I wasent aware it was survival week. Makes sense now.
Aug-16-06  beenthere240: Random Visitor's analysis of 17... Qb6 (see page 1) probably meets <InspiredByMorphy>'s concerns for proof that white is winning. The fact is that 17. o-o is not just survival, it is devastating since Black's counterplay has evaporated and his position is still wide open to numerous attacks. Black's only hope is that white will lose interest in the game and wander out of the chess hall and never return.
Aug-16-06  crafty: 17...♕b6 18. ♕xb6 axb6 19. ♖b1 ♖a6 20. ♖d1 ♔e7 21. ♗f4   (eval 2.22; depth 13 ply; 75M nodes)
Aug-17-06  alicefujimori: <beenthere240><Random Visitor's analysis of 17... Qb6 (see page 1) probably meets <InspiredByMorphy>'s concerns for proof that white is winning.>

Well, if he even doubted white's advantage after 17...Qb6 above, then there is a good chance that he actually believe in this quote of yours: :)

<"Black's only hope is that white will lose interest in the game and wander out of the chess hall and never return.">

Sep-04-06  patzer2: With the puzzle solution 17. 0-0!, White sacrifices a Rook temporarily for a winning double attack after 17...Qxa1 18. Bb2! , when the threat of 18...Qa2 19. Qxb7 decides.
Aug-27-08  sneaky pete: 6.c4 .. was introduced somewhere, far away, sometime, long ago, by Alexander Agressewitsch against the legendary master Semion Defendarow, who on that occasion played two games simultaneously (or simulating) without sight of the board.


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6... c6 (The immediate 6... Bb4+ is dismissed by Semion Alapin, from whose notes to this game in Kagan's Neueste Schachnachrichten 1921 # 4 I'll make use here.) 7.e6 Bb4+ 8.Nc3 Nf6 9.Nf7 Qe7 10.Nxh8 Bxe6 11.cxd5 cxd5 12.Bb5+ Kf8 13.0-0 Nc6 14.f3 .. (The value of this move, by which Mr Agressewitsch attempts to open up a rookfile against the enemy king, is doubtful. But one doesn't play a blind simul against only GM's.) 14... Bxc3 15.Bxc6 Ba5 (Better may be 15... Be5, for after the text move 16.fxe4 bxc6 17.e5 .. is possible) 16.Ba4? Bb6+ 17.Kh1 e3 (This move seals white's fate. The rest is a matter of technique.) 18.Qd3 d4 19.f4 Kg8 20.f5 Bd5 21.Ng6 hxg6 22.fxg6 Qe4 23.Qxe4 Bxe4 24.Bb3+ Kh8 25.Rf4 Bxg6 26.Rh4+ Bh7 27.Bc2 Rf8 28.b4 g5 29.Rh3 Kg7 30.Bxh7 Nxh7 31.Bb2 Rf2 32.Rb1 Rxb2! 33.Rxb2 d3 34.Rb1 d2 35.Rf3 e2 36.Rff1 Bf2!


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White resigns.

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