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Fabiano Caruana vs Alexander Grischuk
London Chess Classic (2015), London ENG, rd 5, Dec-08
Spanish Game: Berlin Defense (C65)  ·  1/2-1/2



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Kibitzer's Corner
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Dec-08-15  Karposian: <ajile: <Marmot PFL: It looks like g4 to make a passed pawn then bringing the king over to the queen side would likely win the bishop ending for white.>

42.g4 Qg3+ is good for Black isn't it?>

g4 is the right plan <after> the queen exchange. I'm sure that's what <Marmot> meant.

Premium Chessgames Member
  Domdaniel: It's clear that <Marmot> referred to a plan in the Bishop ending.
Dec-08-15  Marmot PFL: meant the bishop ending after 44 Qd5+. maybe black tries a5 and c4 sometime to get the a-pawn moving. otherwise looks routine for white to win.
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  offramp: What was wrong with 44.Qd5+?
Dec-08-15  Marmot PFL: White didn't play it anyway...
Premium Chessgames Member
  keypusher: I assume White is just throwing in a few repetitions before playing Qd5+ because...he wants to save his pal Gris from time trouble I guess?
Premium Chessgames Member
  keypusher: OK, I guess Caruana didn't completely trust the bishop ending?

Incidentally, news from engine-land: 45....Kf8 was a blunder losing to 46.Qg6! when Black has nothing better than ...Qg3+ with a completely hopeless ending. But that is not so easy to see.

Dec-08-15  Party Animal: Endgames can really give you a headache, especially if you're already drinking.
Dec-08-15  Marmot PFL: having 2 backward pawns makes the win harder
Premium Chessgames Member
  Domdaniel: Could Grischuk actually survive? I still don't believe it, but there's been uncertainty in Caruana's play.
Premium Chessgames Member
  beenthere240: Black has prospects for a perpetual if he can get his queen to land on e1.
Dec-08-15  WBP: After 52 Qd5+ Qxd5 53 cxd5, is 53...Bg6 good for Black? White can't swap bishops, because Black has a pawn breakthrough on the queenside. If 54 Kg1, Black then swaps bishops on e5 and pushes for the same breakthrough on the queenside. I don't have an engine, and I am working from the diagram. Any thoughts?
Premium Chessgames Member
  Domdaniel: <WBP> Hi, Bill. Good to see you. My thoughts on your analysis will have to wait until I actually have some...
Dec-08-15  WBP: Hey, <Dom> I look in here a lot. Just don't post much. Thanks for the greetings, though!
Dec-08-15  Marmot PFL: black found 53...a4 when white's pieces are both on the b-file
Premium Chessgames Member
  Domdaniel: <WBP> Your idea seems OK, but I don't think Black has anything on the queenside. Even earlier, when he had an extra pawn there, queenside pawn breaks could mostly be ignored by White. In some lines, White could even be two pawns down on the queenside, but it still wouldn't matter.
Dec-08-15  Marmot PFL: Toplaov reduced to looking for stalemate tricks.
Premium Chessgames Member
  Domdaniel: Oops! Unless, of course, Black can play ...a4 with both a White Queen and Bishop on the b-file...
Dec-08-15  WBP: Just to finish my thought (I've set up some chess pieces), after 52 Qd5+ Qxd5 53 cxd5 Bf6,; if 54 Kg1 Bxe5 55 fxe5 c4, and I don't think White can prevent a breakthrough (if he takes on c4, Black pushes the a-pawn which queens with check, and White's fearsome-looking trip of passers falls. On 54 Bxf6 Kxf6, and black has a similar threat (c4). Should the White bishop move (d6, c7, or b8), Black's bishop now commands the a1-h8 diagonal, which is all-important. But perhaps I am missing something...
Premium Chessgames Member
  Domdaniel: Well done Grischuk for drawing, but it was a swindle -- he should've been toast.
Premium Chessgames Member
  Jimfromprovidence: The Stockfish analysis available at the tournament site shows Caruana easily winning with 46 Qg6, below, with the threat of 47 Bg7+.

click for larger view

This forces a queen exchange and after the sequence 46...Qg3+ 47 Qxg3 hxg3+ 48 Kxg3 white has a straightforward endgame.

click for larger view

Dec-09-15  lost in space: Alex "the swindler" Grishuk - I really love it when SGM are not able to win - even though there is clear winning line.

Happens and happened so ofter to me patzer. And I so seldom find the swindling chance.

Dec-09-15  Mr. V: So what should Grischuk have played for move 45?
Choices: 45...Kd8,...Kf7, or ...Qd7
Premium Chessgames Member
  beatgiant: <Mr. V>
45...Kd8?? 46. Bc7+ leads to mate in a few moves.

45...Qd7 46. Qxd7+, or 45...Kf7 46. Qd5+ trades into probably a lost ending for Black. So I wouldn't blame him for hoping for a swindle.

Dec-10-15  Mr. V: <beatgiant> thanks. I'm still pretty shocked it worked
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