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Pentala Harikrishna vs Thien Hai Dao
Goodricke Open (2000), Calcutta IND, rd 8, Feb-13
English Opening: King's English. Four Knights Variation Korchnoi Line (A28)  ·  1-0

ANALYSIS [x]

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sac: 26.Rxg7+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
May-18-21
Premium Chessgames Member
  Phony Benoni: 26.Rxg7+ Kxg7 (26...Kh8 27.Qg8#) 27Bxe5+ followed by taking on d4 seems to solve most of White's problems.
May-18-21
Premium Chessgames Member
  ajk68: I'm not sure but maybe the point of the problem is to take on d4 with the Queen (28. Qxd4)? Otherwise, it's quite straightforward.

But 28. Bxd4 works, but not as convincingly.

May-18-21  agb2002: White has a rook and two pawns for a bishop.

Black threatens Rxc4 and Qxe4+.

The square e5 is defenseless. Hence, 26.Rxg7+ Kxg7 (26... Kh8 27.Qg8#) 27.Bxe5+ followed by 28.Qxd4 (27... Kg6 28.Qg8#) wins one pawn at least.

May-18-21  Walter Glattke: A) 26.Bxe5!? Rxe4+ (26.-Rxc4!? 27.Rxg7+ Kh8 28.Rxc4 Bf6!) 27.Kd2 Rxe5 28.Qxh4!? Bxh4 brings nothing B) 26.Rxg7+ Kxg7 27.Bxe5+ Bf6 28.Qxd5 hare Krishna, hare rama - rook and five pawns for white
May-18-21  Walter Glattke: R+5P for B of course
May-18-21  mel gibson: That was easy - I saw the whole line in under 2 seconds.

Stockfish 13 says

26.Rxg7+

(26. Rxg7+ (♖g3xg7+ ♔h7xg7 ♗c7xe5+ ♔g7-h7 ♕c4xd4 ♕h4xh3 ♖c1-c7 ♕h3-h1+ ♔e1-d2 ♕h1-d1+ ♔d2-c3 ♕d1-c1+ ♔c3-b3 ♗h5-d1+ ♔b3-a2 ♗d1-c2 ♖c7xc2 ♕c1xc2 ♕d4-d7 ♕c2-c4+ b2-b3 ♕c4-f7 a3-a4 ♔h7-g8 ♗e5-b2 ♔g8-f8 ♕d7-c8+ ♕f7-e8 ♕c8-e6 ♕e8-d8 ♕e6xh6+ ♔f8-e8 f2-f4 ♕d8-d2 ♕h6-c6+ ♔e8-d8 ♕c6-a8+ ♔d8-d7 ♕a8-b7+ ♔d7-e8 f4-f5 ♕d2-d7 ♕b7-b8+ ♗e7-d8 ♕b8-e5+ ♕d7-e7 ♕e5-b5+ ♕e7-d7 ♕b5-a6 ♕d7-f7 f5-f6 ♕f7-d7 e4-e5 ♔e8-f7 ♕a6-a8 ♕d7-d3 ♕a8-b7+ ♔f7-e6) +12.28/31 1029)

score for White +12.28 depth 31

May-18-21  Brenin: White is the exchange and 2P (passed, connected) ahead, but has a little problem from the Black R on d4. Solution: liquidate it with 26 Rxg7+ forcing Kxg7 (else mate on g8) 27 Bxe5+ Kh7 (better to keep Bs on, rather than Bf6) 28 Qxd4, and after 28 ... Qxh3 White has gained another P and defused most of Black's threats (though his 2B+Q could still cause problems to the exposed K if not treated with care).
May-18-21  saturn2: Between move 9-12 six pieces dissapeared from the board.
May-18-21  TheaN: Somehow I missed the immediate regain of material, so this took me a bit longer than usual. It's these kind of <simplifications> that might well be the core of chess: White got himself a winning advantage, but more often than not is the counterattack tough to break.

<26.Rxg7+ Kxg7 (Kh8 27.Qg8#) 27.Bxe5+ Kh7 28.Qxd4 +-> and Black may still try something with the bishop pair but is an exchange and four pawns down.

27....Bf6 is actually a gross error as absolute simplification (#:0) occurs: 28.Qxd4 followed by 29.Bxf6+ and the rook invades. If 28....Bxe5 29.Qxe5 Qf6 is forced because of Rc7+, 30.Qxh5 and this will still happen.

SF gives 27....Bf6? 28.Qxd4 Qg5 29.Bxf6+ Qxf6 30.Rc7+ Bf7 (Kg6 31.Qd5! #6) 31.Qxf6+ Kxf6 32.e5+ Ke6 33.Rxf7 Kxf7 +-.


click for larger view

Hm yesh.

May-18-21  Cheapo by the Dozen: What <Phony Benoni> said. White has a material advantage, but is slated to lose a pawn of it back with some remaining pressure on his king. Instead, he can win at least an additional pawn and simplify at the same time.
May-18-21  Cheapo by the Dozen: If Black had played 25 ... Rc8, things could have gotten lively. The refutation 26 Bxd5 doesn't work exactly as the game continuation did, and also doesn't exactly lead to a discovered check "windmill"/"Schlagmuehle". Instead, per the engine, there's a queen sac and more.
May-18-21  malt: 26.R:g7+ K:g7 27.B:e5+ Kh7 (...Bf6) 28.Q:c4
May-18-21
Premium Chessgames Member
  chancho: 26. Bxe5 Rxc4 27. Rxg7+ Kh8 28. Rxc4 looks convincing too.
May-18-21
Premium Chessgames Member
  chrisowen: Lemons ivory Rxg7+ garcon arrive in ointment bubbled it is vide box i avarice revive lemons ivory muddy girls grips ivory rooks revive wibble quotient chat it is ok ovids revive juice it is vide revive nefarious fevered it is ay vast cloth go up in i dew it is query z vast totadd figure affable packforth effort it is hark bottle revive went it is choose Rxg7+ grab.
May-18-21  RandomVisitor: <saturn2><Between move 9-12 six pieces dissapeared from the board.>Yes, quite a few pieces disappeared. 8 x's means 8 pieces got put on the side of the board in a row.
May-18-21  Nullifidian: 26. ♖xg7+ ♔xg7 27. ♗xd5+ and then ♕xc4 on the next move.
May-18-21
Premium Chessgames Member
  chrisowen: No Rd4 cage gangways walk plank no x
May-18-21  RandomVisitor: After 14.d3 black had 14...e4, and an advantage...


click for larger view

Stockfish_21051710_x64_modern:

<77/93 12:57:22 -0.48 14...e4 15.dxe4 Bd6 16.e5 Bxe5> 17.Bd2 Qh4 18.Bc3 Qxh2 19.Kf1 Rb8 20.Qf5 Bc6 21.a4 Bxc3 22.bxc3 Qd6 23.Rg3 g6 24.Qc2 Qe5

May-18-21  TheaN: <chancho: 26. Bxe5 Rxc4 27. Rxg7+ Kh8 28. Rxc4 looks convincing too.>

No, and that may well be the point of this puzzle. After 26.Bxe5? Black's the one who gets to simplify with interest. After 26....Qxe4+ 27.Kf1 (Qe2 Qxe2#; Re3 Rxc4 -+) Qh1+ 28.Rg1 Rxc4! -+ Black takes over, as 29.Rxh1 Rxc1+ doesn't work. White's only try is 29.Rxc4 which loses after 29....Qxh3+ -+, but 29....Be2+? 30.Kxe2! Qxg1 31.Rg4 +-

May-18-21
Premium Chessgames Member
  chancho: < TheaN> I stand corrected!

Thanks.

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