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Krunoslav Hulak vs Oleg Romanishin
URS-YUG U18 (1969), Moscow URS, Apr-??
Sicilian Defense: Old Sicilian. Open (B32)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Apr-20-19  devere: 25.Rfd1 was a blunder that loses. Instead 25.f5! prevents 25...Rxe4 and keeps equality.
Apr-20-19  ChessHigherCat: This is a tough one. At first I thought it might be axb2:


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21...axb2 22. Bxc6 Nc3 23. Bf3 Qb5 looks winning for black, with the passed a- and b-pawns.

If white plays 22. Bxe4 instead, though, black has nothing.

After looking at nine million worthless alternatives, I have to admit I am one of those Hulak a solution.

Apr-20-19  ChessHigherCat: Wow, after playing through the game I feel like I was just electrocuted! I wonder if my hair is smoking.
Apr-20-19  qkxwsm: hmm, engine suggests that 21...Rxc2 is the only move that doesn't lose
Apr-20-19
Premium Chessgames Member
  agb2002: Black has a bishop, a knight and a pawn for the bishop pair.

White threatens Bxc6, Bxe4 and bxa3.

After 21... Rxc2 22.Bxe4 (22.bxa3 Re2) the bishops are aligned on the e-file, so 22... Re2:

A) 23.Qg3 Re8

A.1) 24.Bf3 R2xe3 25.bxa3 (25.Bxh5 Rxg3) 25... Qc5 26.Kh1 Qxa3 wins two pawns.

A.2) 24.Rxd6 Rxe4 25.Rd8+ Bf8 26.Rxf8+ Kg7 looks very good for Black. For example, 27.Ra8 R4xe3 28.Qg4 Qxg4 29.hxg4 axb2 30.Rxa5 Rb3 31.Rb1 Rc2 wins.

B) 24.Bf3 Rxe1

B.1) 25.Bxh5 Rxe3 26.Bf3 axb2 - + [3p].

B.2) 25.Rfxe1 Qb5 26.bxa3 Qa4 27.Rxd6 Qxa3 - + [q+p vs R+B].

C) 24.g4 Rxe1 25.gxh5 Rxe3 26.Ba2 axb2 - + [3p].

Apr-20-19  goodevans: <devere: 25.Rfd1 was a blunder that loses. Instead 25.f5! prevents 25...Rxe4 and keeps equality.>

I really wish folk would keep the term 'blunder' for when the player has missed something obvious. It certainly wasn't obvious to me that <25.f5!> was the right move or exactly why.

I think a bit more explanation is in order.


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If black plays <25...Rxe4?> now white will respond with <26.Rd8+ Bf8 27.Rxf8+ Kg7 28.Rg8+!>


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Whether black takes the R or not he will succumb to a fatal check from white's Q.

Stockfish reckons that instead of 25...Rxe4(?) black should capture <25...gxf5> but after <26.Rxf5> the black queen is attacked with nowhere to go. Black has salvation in a series of captures: <Rxe3 27.Qxe3 Qxf5 28.Bxf5 Rxe3>


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Now white can win a piece with <29.Rd8+ Bf8 30.Rxf8+ Kg7 31.Rb8> but with black's Q-side pawns SF reckons this is drawing.

<qkxwsm: hmm, engine suggests that 21...Rxc2 is the only move that doesn't lose>

That makes this a valid puzzle by CG.com criteria but the fact that 21...Rxc2 isn't winning will no doubt disappoint some folk around here.

Apr-20-19  et1: The first two black moves scream to be played...
Apr-20-19  schachfuchs: I wonder if and how far this opening was a home prep of any of them?
Apr-20-19  BxChess: <agb2002> In your line A.1 24. Bf3 R2xe3
what do you say to 25. Bxh5 Rxg3 26. Bf3.
The rook is trapped and will be lost. The bishop can come to the rescue, but this leaves two pieces out of action.
Apr-20-19  cormier:


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Analysis by Houdini 4 d 23 dpa done

1. = / + (-0.30): 17...Rfe8 18.Nb6 Nxd4 19.Rxd4 Bxd4 20.Bxd4 Bc6 21.Nxc8 Rxc8 22.axb4 axb4 23.Bc4 Rb8 24.Ba7 Ra8 25.Qxb4 Qf5 26.Bd4 Ng3 27.Rf2 h5 28.Qe1 Bd5 29.Bb5 Be4 30.c4 h4 31.b3 Kh7 32.Ba4 f6 33.Qe3 Kg7 34.Bb2 Kh6 35.Rd2

2. = (-0.23): 17...Rce8 18.Nxc6 Bxc6 19.axb4 e6 20.Nc3 Nxc3 21.bxc3 Rc8 22.c4 axb4 23.Rxd6 Bc3 24.Qf2 Rfd8 25.c5 Bb5 26.Rc1 Rxd6 27.cxd6 Rc6 28.f5 Qxf5 29.Qxf5 gxf5 30.Rd1 Rc8 31.Kf2 Kg7 32.Bd4+ Kg6 33.g3 Rd8 34.Bb6 Rd7 35.Bc7 Kf6 36.Ke3 Be5 37.Kf2 Bc6

Apr-20-19  cormier:


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Analysis by Houdini 4 d 24 dpa done

1. = (-0.12): 16.axb4 axb4 17.Nd5 Nxe4 18.Qe1 Rce8 19.Nxc6 Bxc6 20.Bb6 e6 21.Qxe4 exd5 22.Qxb4 Rb8 23.Qa5 Ra8 24.Qd2 Bxb2 25.Bxd5 Bxd5 26.Qxd5 Qxd5 27.Rxd5 Ra6 28.Bc7 Rc8 29.Rxd6 Rxd6 30.Bxd6 Rxc2 31.Rd1 Kg7 32.Kh2 Kf6 33.Kg3 Rc4 34.Rd3 Ke6 35.Kf3 Bd4 36.Ba3 Ra4 37.Bc1

2. = (-0.19): 16.Nxc6 Bxc6 17.axb4 axb4 18.Nd5 Bxd5 19.exd5 Ne4 20.Qe1 Bxb2 21.Bc1 Bxc1 22.Qxe4 Qf5 23.Rde1 Qxe4 24.Rxe4 Bd2 25.Rxe7 Rfe8 26.Rd7 Rcd8 27.Rxd8 Rxd8 28.g3 Bc3 29.Kg2 Re8 30.Ba4 Ra8 31.Bb3 Kg7 32.Rf2 Bd4 33.Re2 Ra1 34.g4 Rg1+ 35.Kf3 Rf1+ 36.Ke4 Bc3 37.Re3 Rf2 38.h4 Rh2

Apr-20-19  goodevans: <BxChess> Trapping the R is a nice idea, but...

Worst case scenario the R can trade itself for the B at some point, meanwhile after <26...axb2> the black Q-side pawns become monsters worth much more than the loss of the exchange.

Apr-21-19
Premium Chessgames Member
  agb2002: <BxChess> Thank you for the idea and thanks to <goodevans> for the answer!

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