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Anish Giri vs Yu Yangyi
Qatar Masters (2014), Doha QAT, rd 8, Dec-03
Queen's Gambit Declined: Ragozin Defense (D38)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
Dec-03-14  SirRuthless: It appears that the air has come out of the balloon...

Bxh6?! Qh2!

Bxg7 Qh1+!

Ke2 Qg2+

Yu Yangyi went for the more elegant plan of playing against the weak white king and forcing an eventual Kxe4 and Qe1+ skewer winning the game. He had several chances to make a caveman move and liquidate but he maintained the pressure and found a cleaner win. These last two games of Giri really highlight how awesome Caruana's accomplishment in St. Louis actually was. Not only did he win seven straight against far tougher competition, even when his magic run ended he still was able to bring home the event in a controlled fashion and never dropped a game. Giri's run got to his head a bit and now he has come crashing down to earth.

Dec-03-14  dumbgai: At first I thought Yu Yangyi had blown the win by losing the c-pawn. But he doesn't stop trying to press and is eventually rewarded. Bxh6 looks like an unforced error to me but maybe Giri didn't see any other way of defending.
Dec-03-14  CountryGirl: The very end reminds me of a Troitsky study. Nice.
Dec-03-14
Premium Chessgames Member
  chancho: What would capa think of this game if he were alive...
Dec-03-14
Premium Chessgames Member
  Gilmoy: And a fork: 92.Kd3 Qd2+ 93.Kc4 Nd6+:


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Dec-03-14  coolconundrum: Bxh6 is a complete mystery to me... better get out the engine I suppose..
Dec-03-14  Mudphudder: Giri lost again? Wow when it rains, it pours!
Dec-04-14  Ulhumbrus: Instead of 12 Rc1 suppose that White plays 12 Ne5 at once. Then on 12...Qb6 13 Bf3 threatens the d5 pawn. On 12 Rc1 Nbd7 13 Ne5 Qb6 14 Bf3 Black's KN is unpinned and so 14...Ne4 becomes possible. This suggests that 12 Rc1 loses an important tempo.
Dec-05-14  visayanbraindoctor: <chancho: What would capa think of this game if he were alive...>

'We regret Giris's blunder; but due to the tricky nature of the position and his desire to secure the draw by perpetual, we understand how he could have fallen for the illusion of a mistaken combination.'

This is a typical example of a missed tactic (also called an oversight). It's a mistaken combination wherein Giri misses a zwichenzug tactic Qh2, without which the game immediately ends in a perpetual. The human mind seems programmed to tend to miss these little tricks. Giri expected that Yu would have to capture the bishop and considered no other option.

AFAIK in Kotov's book, he discusses analysis trees and their nature. Some look like pretty little trees with well demarcated straight branches; others look like thick bushes. I think these missed tactics occur because the human brain does tends to automatically exclude certain moves from its list of potential candidates.

Every one can fall prey to this phenomenon, sometimes spectacularly. Recent spectacular ones are Morozevich vs E Inarkiev, 2014 41.. Rc1, and the double blunder in the Carlsen vs Anand WC match which every one must have already seen.

As a chess player loses focus (tiredness, excitement, impatience, lack of or too much confidence, distractions, and so on), I believe the chances for this missed tactic phenomenon increases. Giri must have felt tired or got too excited over what he saw as a potential draw in the bag; and so failed to examine other options or branches in the analysis tree.

I recently made a comment in O Bernstein vs Capablanca, 1914 about this. From several moves at the origin of a series of tactical captures and because we are programmed to consider back rank checks as all important, the human brain tends not to even consider 29... Qb2, the equivalent of a mental mouse slip.

Regarding Capablanca, at his prime he seems to have been the only player in history who never fell to this phenomenon resulting in a lost position. But even he finally did against Reti in 1924. Even then he rarely would do so for the rest of his career except in AVRO 1938.

Dec-06-14  Bondsamir: Your lady is gone with or without your willing, buddy.
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