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Aleksey Dreev vs Leinier Dominguez Perez
Karpov Poikovsky (2005), Poikovsky RUS, rd 5, Mar-03
Semi-Slav Defense: Stoltz Variation. Shabalov Attack (D45)  ·  1-0

ANALYSIS [x]

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sac: 26.Rgxg6+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Aug-02-07  Tactic101: I think either rook would work out. Is that true? BTW, a very nice sac to lure to king out for a long walk in the middle of the fire! A little harder than what meets the eye.
Aug-02-07  Marmot PFL: Nice rook(s) sacrifice. No doubt dreev saw the subsequent king hunt better than i did or tried to but with the king unprotected and Q,R and both Bs attacking you can be pretty sure of finding a win. Once I saw 28...Ke8 29.Bh5+ Kd8 30.Ba5+ that was enough as I knew on Ke6 the game would not last long.
Aug-02-07  willyfly: White is down by 3 ♙s but Black has undeveloped pieces - White could lose a ♖ if Black is allowed to play ♗f5 - something drastic is needed - how about a good old fashioned double ♖ sac

26 ♖gxg6+
-if 26...♔h8 27♖e6+ wins the Black ♕

26...hxg6 27 ♖xg6+
if 27...♔h7 28 ♖e6+ again wins the ♕

27...fxg6 28 ♕xg6#
did I really get a Thursday puzzle all the way? Time to look...

-----
awwwwww darn... forgot to go back and check the 26...fxg6 line - but hey! - not too bad for a beginner - maybe now I'm a candidate for <advanced beginner hopeful>

Aug-02-07  MikeChesss: Nice puzzle. Has anyone else been having trouble accessing the Free Internet Chess server? I haven't been able to get in the past two days.
Aug-02-07  uuft: <Tactic101> I see nothing wrong with 26. Rfxg6+ fxg6 27. Rxg6+ ... Full credit for the both of us imho :)
Aug-02-07  zb2cr: Saw that if White sacrifices both Rooks on g6, and Black takes both, White mates immediately. (e.g. 26. Rfxg6+, hxg6; 27. Rxg6+, fxg6??; 28. Qxg6#.) This encouraged me to continue exploring the Rook sacrifice line.

So what about other lines? Black can take with either Pawn. 26. Rgxg6+, hxg6; 27. Rxg6+, Kh7; 28. Rg7+ (double check), Kh6 (or h8); 29. Qh7#. So that's not the best defense.

This leads to 26. ... fxg6; 27. Rxg6+, Kf7. 28. Rg7+ looks strong, forcing either 28. ... Ke8 or 28. ... Ke6. Looking at these two variations separately:

a. 28. ... Ke8; 29. Bh5+. Looks like Black must play 29. ... Kd8, since 29. ... Rf7 just loses a Rook to 30. Bxf7+. After 29. ... Kd8, 30. Ba5#! Looking good, one more line to check.

b. 28. ... Ke6; 29. Bg4+. Okay, what are the sub-variations here? 29. ... Rf5, 29. ... Kd6, 29. ... Kd5. Here's where my board vision began giving out. I thought that after 29. ... Rf5; 30. Qxf5, Kd6 White has regained his material and is in a promising position. After 29. ... Kd6 or 29. ... Kd5, I figured 30. Qd1+ would force Black onto the e-file where 31. Re7+ would win the Queen. This would leave White up by Queen vs. Rook, a win. However, I forgot the White Bishop now on g4.

All of this analysis took me about 1 & 1/2 minutes, so it's remotely possible I might have seen this in a game. Would I have had the guts to play it OTB? Unclear!

Aug-02-07  pggarner: I was trying to imagine what I would have played OTB, and it looks like 25.Bh5 followed by 26.Bxg6 would have gotten the job done for White with less risk. Neither 25...Qh6 nor 25....Nf4 can save Black in that case.
Aug-02-07
Premium Chessgames Member
  kevin86: I saw the rook sac-I think I could have won after that,though not necessarily by the text moves.
Aug-02-07  eaglewing: I looked not too deep into it and thought of 28. Rf6+ instead of Rg7+. Anything wrong with it?

28. Rf6+ Kg7 Rf3+
28. Rf6+ Kg8 Qb3+
28. Rf6+ Ke7 Qxh7+
28. Rf6+ Ke8 Bh5+

Aug-02-07  Werewolf: Hi MikeChess, I have also had problems with FICS in past three days
Aug-02-07  tdubb43: At move 32, the game is technically tied at 20 points apiece. However, the positional advantage is so overwhelmingly in favor of white that black is either insane or being a sore loser for continuing at this point. I would feel like a kid in a candy store if I were playing white from 32 on. So many ways to win... I probably would've gotten cute with 32.Bd2 and gone on to knock out all of his material before mating, just to teach him a lesson for not resigning.
Aug-02-07  Tamerlan: Bd2 would be better than Rxe3!
Aug-02-07  Tamerlan: Instead of Qg7+, white could also play Re5+!! That would be a much better alternative!
Aug-02-07  newton296: saw the double rook sak ! Then I figured long stroll for the black king through the fire. Wasnt sure if white could mate here but I would have risked it ( otb)
Aug-02-07  gnixon: Tuesday. Rxg6+, Rxg6+, plus infinite checks on the fleeing king = full solution
Aug-02-07  Fezzik: I don't think we get full credit unless we see 30.Qd1 Kc5 31.b4+ before we move the pieces.

Yeah, the attack R1xg6 *seems* to work, but unless you can *prove* it works you won't be able to beat the best players.

Aug-02-07  soberknight: Damn, didn't see the full continuation. I thought it was a simple sac and mate.
Aug-02-07  zb2cr: <eaglewing>,

Not so sure about your proposed alternative. 26. Rgxg6+, fxg6; 27. Rxg6+, Kf7; 28. Rf6+, Kg7; 29. Rf3+, Kg8; 30. Rxe3, Bf5; 31. Qxf5, Rxf5; 32. Rxh3 and White is just up by 2 pieces vs. a Rook, which is not a killer.

Of course, I'm sure there are improvements for both Black and White possible.

Aug-02-07
Premium Chessgames Member
  fm avari viraf: Black's King fortress is in jeopardy & White's pieces are ready to pounce hence, 26.Rgxg6+ fxg6 27.Rxg6+ Kf7 28.Rg7+ Ke6 [ not ...Ke8 then 29.Bh5+ ] 29.Bg4+ Kd5 30.Qd1+ Ke4 [ not ...Kc4 then 31.Be2+ Kc5 32.b4+ Kb6 & 33.Bd4+ wins nor 30...Kc5 saves ] The rest is all techniques which enlightens our minds.
Aug-02-07  YouRang: I found it, more or less. With all that firepower aimed at black's poor king, the idea of a double rook sac was pretty obvious. (Of course, if black accepts the 2nd rook, he gets mated in 1).

Like others, I went with 26. Rfxg6+, but I suppose it doesn't matter much.

I only saw it through far enough to know that it sends the black king running around naked, pursued by a hostile queen, rook and pair of bishops.

Aug-02-07  Crowaholic: Sigh... I found 26. Rfxg6+ fxg6 27. Rxg6+ Kf7 (..hxg6 28. Qxg6#) 28. Rg7+, but didn't consider this to be winning because I failed to visualize the consequences of 28. ..Ke6 29. Bg4+!
Aug-02-07  patzer2: White demolishes the pawn cover around the weakened castled position with today's puzzle solution 26. Rgxg6+!!, which begins a winning pursuit (King Hunt)of the Black monarch.
Aug-02-07  CapablancaFan: After 28.Rg7+, I would have resigned at that point, it's not hard to see that the black king is doomed after that.
Aug-02-07  bogo78: a hunt of epic proportions. I have little experience in this type of pursuits, so no wonder i was not able to see all the lines after Bg4+...
Aug-03-07  eaglewing: <zb2cr> I would prefer 30. Rxe3, Bf5 31. Bd3 and advantage Q vs R. However, 28. Rf6+ Ke8 Bh5+ Kd8 Rcxf8+ Kc7 Black giving back the rook might lead to just small material and some positional advantage instead of the ovewrwhelming one with Rg7.
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