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Mikhail Gurevich vs Gilles Andruet
Marseille (1988)
Bogo-Indian Defense: Grünfeld Variation (E11)  ·  1-0



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Kibitzer's Corner
Jan-30-20  EIDorado: The motifs around the king are obvious. The order is important though.
Jan-30-20  Walter Glattke: A) 27.Nxe6+ Kh8 28.Nxd8 wins B) 27.-fxe6 28.Bxg6 Kxg6 29.Rxe6+ wins C) 28.-Bxg6 29.Rxe6 Qc7 30.Qf6+ Kg8 31.Qxg6+ Kf8 32.Rf6+ wins C2) 31.-Kh8 32.Qxh6+ Qh7 33.e.g. Qxh7+ Kxh7 34.Re7+ Kg6 35.Rxb7 wins D) 29.Rxe6+ Qxe6 30.dxe6 Rxd1+ 31.Qxd1 Kf6 32.Qd6 Re8 white advantage, "mate in 50" about
Jan-30-20  Walter Glattke: C3) 31.Re7 Qxe7 32.Qxe7 wins
Jan-30-20  mel gibson: I saw that line but wasn't sure if it was the right one.

Stockfish 11 says:

27. Nxe6+

(27. Nxe6+ (♘g5xe6+ f7xe6 ♗e4xg6 ♖d8-d6 ♗g6-c2 e6-e5 ♖e1xe5 ♗e8-f7 ♕f3-g3+ ♔g7-f8 ♖e5-f5 ♖a8-e8 ♖f5-f4 ♕b6-d8 ♗c2-g6 ♖e8-e7 ♗g6xh5 ♖d6xd5 ♖d1xd5 ♕d8xd5 ♕g3-c3 ♕d5-g5 g2-g3 ♔f8-g8 ♗h5xf7+ ♖e7xf7 ♕c3-c8+ ♔g8-g7 ♖f4-g4 ♔g7-f6 ♕c8-d8+ ♔f6-g6 ♕d8-d3+ ♔g6-g7 ♖g4xg5+ h6xg5 ♕d3-d5 ♔g7-f6 ♕d5-d6+ ♔f6-g7 ♕d6-e5+ ♔g7-f8 ♕e5xg5 ♖f7-d7 ♕g5-h5 ♔f8-e7 ♕h5-e5+ ♔e7-f7 ♔g1-g2 ♔f7-f8 ♕e5-f6+ ♔f8-e8 ♕f6-g5) +8.95/38 221)

score for White +8.95 depth 38

Premium Chessgames Member
  prn: IF A) 27.Nxe6+ Kh8, White doesn't play Nxd8 just to gain the exchange. 28.Qf6+ mates on the next move.
Premium Chessgames Member
  chrisowen: Kainbug vintbug ne6grub jahrule recindy einbung effecty 2 3 it ok revoter vintbug pe6grub effacey vintbug bg6grub gungbad bg6grub gangbug vintbug dunks it diminishy 28Rd6 vestbug dintbug eoyordy dubgrub duffbug vintbug 2 3 it ok revoter vintbug dunks it evermorey 29.Rxe6 vestbug effecty appabug 4 5 it ok revoter vintbug ruggluv kainbug podjump its ontanky vintbug direzit ok revoter vintbug reblack its dontire vintbug zithubs revoter vintbug callits tonnage vastbug revoter ne6grub effecty vintbug jahrule vintbag dintbug hadjump vintbug efforty teflony vintbug guffbug flunger huffbug fifthin maggyum dunks it hivein 26h6 vestbug rebothy vintbug recioay huffbug 2 it ok revoter vintbug dunks it evicty 26e5 vestbug mouthin vintbug recioay ebberum 0 1 it ok revoter vintbug umsumum flickin icicles fadebug hackbug ruggluv kainbug ne6grub efforty?
Premium Chessgames Member
  chrisowen: No no Hoffman.
Premium Chessgames Member
  Jimfromprovidence: There is a forced mate if 28...exd5, below.

click for larger view

I missed it and went for 29 Rxe8, with the threat of 30 Qf7#

Premium Chessgames Member
  agb2002: White is one pawn down.

Black threatens hxg5 and Qxb4.

The rook on e1 x-rays e6 from which would attack the sixth rank. Therefore, 27.Nxe6+ fxg6 (else 28.Nxd8) 28.Bxg6:

A) 28... Bxg6 29.Rxe6 Qxe6 (29... Qxb4, or 29... Rd6, 30.Qf6+ followed by 31.Qxg6+ wins) 30.dxe6 Rxd1+ 31.Qxd1 + - [Q+P vs r+b].

B) 28... Kxg6 29.Rxe6+ as above.

C) 28... Rxd5 29.Rxd5 exd5 (29... Bxg6 30.Rd7+ followed by 31.Qf6 wins) 30.Bxe8 wins.

D) 28... exd5 29.Re7+ Kxg6 (29... Kg8 30.Bh7+ Kh8 31.Qf8#) 30.Qg3+ Kf5 (30... Kf6 31.Qg7+ Kf5 32.Re5+ Kf4 33.Qg3+) 31.Qe5+ Kg4 (31... Kg6 32.Rg7#) 32.Rd4+ Qxd4 33.Qxd4 Kg(f)5 34.Qe5+ and mate in two.

E) 28... Rd6 29.Bxh5 wins a pawn at least. For example, 29... Qxb4 30.Rxe6 Rxe6 31.dxe6 Bxh5 32.Qxh5 Qf4 33.e7 Qf7 34.Qe5+ Kh7 35.Rd8 wins.

Jan-30-20  landshark: I went with the same as <Jimfromprovidence> - missing the forced mate (beginning with 29.Re7+) but which SF also gives as a win (+5.67 or so with best defense) - main point being if black stubbornly fights to refute it he can easily get mated as in 28...exd5 29. Rxe8 Kxg6 after which white gets him with 30. Re7! mating. For instance, if 30.... Qf6, then 31. Qd3+ Kg5 32. f4+ Qxf4 33. Rg7+ Kf6 34. Qg6+ Ke5 35. Re7#
Premium Chessgames Member
  Richard Taylor: I thought it was 27. Bxg6 but just noticed now that there is a pawn on h6 so 27. ... hxg5 can take place in reply.

But White still has a good position.

Missed Nxe6+ which, now I have seen it, should be the first option as it is a fork and is check.

'Look at all checks and captures.' They say.

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