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Michael Rohde vs Boris Markovich Kogan
USA-ch / Zonal (1986), Estes Park, CO USA
Spanish Game: Morphy Defense. Modern Steinitz Defense (C75)  ·  1-0

ANALYSIS [x]

FEN COPIED

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sac: 24.Be6 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Apr-30-16  diagonalley: hmmm... yep, agree with <Penguincw>...got the first few moves ok, but converting the position ain't at all easy... excellent puzzle
Apr-30-16  dfcx: the first few moves play themselves out. White's queen and bishop are under attacks, he can save one - which is easy to guess as POTD.

24.Be6 Nxf3 25.Rxg7+ Kh8 (Kf8?? 26.Rxf7+ mates) 26.Bxf7 h5 27.gxf3

Here black has to defend against Bg7 or try to get perp checks. There are several choices, Qh3, Qf2, Qf6, Qe7

Too many variations for this early morning hour. White should win eventually with the passed pawn.

As the text 27...Qf2, according to Stockfish white is better off with 28.Bxh5 exf4 29.exf4 Qxf4 30.R7g3 Qxf5 31.Bg4 Qe4+ 32.Bf3 Qf5 33.Bg2! wins


click for larger view

Apr-30-16  Cheapo by the Dozen: In part because of the ... Nxf5 threat, a lot of players would recognize that the queen sac is called for.

But calculating it out to the end would be beyond most of us. :)

Apr-30-16  mel gibson: I saw this immediately but not how to finish it off.
Apr-30-16  AlicesKnight: I'm with <mel gibson> - should have thought of hoovering up the R, N and Ps which black has no time to save...
Apr-30-16
Premium Chessgames Member
  agb2002: White has a bishop for a knight.

Black threatens 24... Nxe3, 24... Rxd7, 24... Nxf4, etc.

The only move seems to be 24.Be6:

A) 24... Nxe3 25.Rxg7+ Kh8 (25... Kf8 26.Rxf7+ Ke8 27.Rg8#) 26.Bxf7 (threatens 27.Rg8+ Rxg8 28.Rxg8#)

A.1) 26... h5 27.fxe3 (threatens 28.R7g5 and 29.Rxh5+ ending up a bishop ahead at least)

A.1.a) 27... Rf8 28.Bd5

A.1.a.i) 28... Rxf5 29.Be4 Qh3 (29... Rf8 30..Rh7#) 30.Rg8+ Kh7 31.Rg5 wins.

A.1.a.ii) 28... Rf6 29.Bg8 Rh6 30.Bh7 Rf6 (30... Rxh7 31.Rg8#) 31.Rxc7 Rf8 32.f6 followed by 33.Be4(f5) looks winning.

A.1.a.iii) 28... c6 29.Bf3 Rf6 (29... Rxf5 30.Rg8+ Kh7 31.Be4 wins decisive material) 30.R7g5 wins decisive material (30... Rh6 31.Rg8+ Kh7 32.R1g7#).

A.1.b) 27... Qf6 28.R7g6 Qxf7 29.Rh6+ Qh7 30.Rxh7+ Kxh7 31.fxe5 dxe5 32.Rd1 with an extra pawn and a much better ending.

A.2) 26... h6 27.Bg8 Rxg8 (due to 28.Rh7#) 28.Rxg8+ Kh7 29.R1g7#.

A.3) 26... Qd8 27.Rg8+ Qxg8 28.Rxg8+ Rxg8 29.Bxg8 Kxg8 30.fxe5 dxe5 31.e4 + - [P].

B) 24... Kf8 25.Bxd5 wins a piece at least.

C) 24... c6 25.Rxg7+ Kh8 (25... Kf8 26.Rxf7+ Ke8 27.Rg8#) 26.Bxf7 h6(7) (26... Nxe3 27.Rg8+ Rxg8 28.Rxg8#) 27.Bxd5 + - [R+P].

Apr-30-16  Deji: It wasn't that hard :-)
Apr-30-16  scormus: <mel gibson> right! In fact fact they only way I could get 24 Be6 was knowing it was a puzzle, then the next few moves follow but with no indication to me of a direct win.

So was Be6 a speculative or positional sacrifice? The Si suggests a good jdugement of position with a moderate (ca. +0.8) edge to W up to 28 ... e4? After that B's position falls apart although his positon is difficult. 28 ... c6 would have put up better resistance - the WB was controlling both g8 and g2 and B needed to challenge it.

Apr-30-16  mel gibson: <<mel gibson> right! In fact fact they only way I could get 24 Be6 was knowing it was a puzzle, then the next few moves follow but with no indication to me of a direct win.

So was Be6 a speculative or positional sacrifice? The Si suggests a good jdugement of position with a moderate (ca. +0.8) edge to W up to 28 ... e4? After that B's position falls apart although his positon is difficult. 28 ... c6 would have put up better resistance - the WB was controlling both g8 and g2 and B needed to challenge it.>

It wasn't hard to see as the Black King was staring down the barrel of 2 connected Rooks
& his only protection could be pinned by the bishop.

Apr-30-16  WorstPlayerEver: Old story. White has to sustain their attack and defend Kh1 against attacks along the light square diagonal h1-a8.
Apr-30-16  morfishine: <24.Be6> ties down the only piece protecting the Black King
Apr-30-16  RandomVisitor: After 26.Bxf7 black could try a losing rook-and-pawn ending:


click for larger view

Komodo-9.42-64bit:

+1.67/38 26...h5 27.fxe3 <Qe7> 28.R7g6 Qxf7 29.Rh6+ <Qh7 30.Rxh7+> Kxh7 31.Rg5 exf4 32.exf4 Rf8 33.Kg2 d5 34.Kg3 c5 35.Kf3 Kh6 36.Rg6+ Kh7 37.Rd6 Rxf5 38.Rd7+ Kh6 39.Rxb7 d4 40.cxd4 cxd4 41.Rb6+ Kg7 42.Ke4 Rf7 43.Rxa6 Re7+ 44.Kxd4 Re2 45.Rb6 Rxh2 46.Ke4 Rf2 47.a4 h4 48.Rb3 h3 49.Rxh3 Rxb2 50.Rg3+ Kf6 51.a5 Ra2 52.Rg5 Ra3 53.Re5 Ra2 54.Kf3 Ra4 55.Kg4 Ra3

Apr-30-16  RandomVisitor: In the game, black was doing fine until move 19, when there was a better way to block the white rooks on the g-file:


click for larger view

Komodo-9.42-64bit:

0.00/40 19...Nc8 20.Rg4 Qf6 21.Rag1 <g6> 22.Bc2 Nb6 23.f4 exf4 24.Rxf4 Qg7 25.Rh4 Rfe8 26.Qc1 Re5 27.Qf1 Rae8 28.f3 Qf6 29.Qh3 Qg7 30.Qf1

Apr-30-16
Premium Chessgames Member
  thegoodanarchist: Rohde didn't trip...
Apr-30-16
Premium Chessgames Member
  paulalbert: I got this one without too much difficulty, but partly because I had seen it before. GM Michael Rohde won my first place brilliancy prize for this game that year 1986. In fact Michael won the first prize also in 1987 and 1988, the only person ever to win first prize three years in a row. Although GM Rohde is past his playing prime and most of his chess activity is now oriented to coaching, lecturing, teaching etc., he played on my Connecticut Dreadnoughts Team in the U.S. Chess League last fall and he remains a fierce, innovative competitor. On this game, let me quote an excerpt from my Foreword from IM Danny Kopec's and Lubomir Ftacnik's book on all 64 games that won my brilliancy prizes from 1982 to 2002: " ...... I invited Michael to lunch and he was gracious enough to go over the game with me. ........he commented to me that he was surprised that he had won the prize for that game indicating in his judgment any GM could see that the queen sacrifice was the only logical continuation to attempt to achieve a winning advantage....."

At the time it was not obvious to me! However, now with the benefit of working on these Chessgames puzzles every day, I at least consider these kind of moves. Of course in my own real games, calculating accurately whether they work or not is the really difficult challenge.

Apr-30-16
Premium Chessgames Member
  paulalbert: I got this one without too much difficulty, but partly because I had seen it before. GM Michael Rohde won my first place brilliancy prize for this game that year 1986. In fact Michael won the first prize also in 1987 and 1988, the only person ever to win first prize three years in a row. Although GM Rohde is past his playing prime and most of his chess activity is now oriented to coaching, lecturing, teaching etc., he played on my Connecticut Dreadnoughts Team in the U.S. Chess League last fall and he remains a fierce, innovative competitor. On this game, let me quote an excerpt from my Foreword from IM Danny Kopec's and Lubomir Ftacnik's book on all 64 games that won my brilliancy prizes from 1982 to 2002: " ...... I invited Michael to lunch and he was gracious enough to go over the game with me. ........he commented to me that he was surprised that he had won the prize for that game indicating in his judgment any GM could see that the queen sacrifice was the only logical continuation to attempt to achieve a winning advantage....."

At the time it was not obvious to me! However, now with the benefit of working on these Chessgames puzzles every day, I at least consider these kind of moves. Of course in my own real games, calculating accurately whether they work or not is the really difficult challenge.

Apr-30-16
Premium Chessgames Member
  paulalbert: Sorry about double send. Computer acting up!
Apr-30-16
Premium Chessgames Member
  offramp: Magnus Carlsen has taught us all how wonderful it is to have to have doubled pawns.

Today's puzzle shows how powerful tripled pawns are.

Apr-30-16
Premium Chessgames Member
  kevin86: This is like a Monday puzzle in reverse; this time the first move is obvious- except that it IS a queen sac. Great finish...win in triplicate.
Apr-30-16  RandomVisitor: 24.Be6 Nxe3 25.Rxg7+ Kh8 26.Bxf7 h5 27.fxe3 Qe7 28.R7g6 Qxf7 29.Rh6+ Qh7 30.Rxh7+ Kxh7


click for larger view

Komodo-9.42-64bit:

<+3.13/37 31.fxe5 dxe5 32.Rg5> Rd8 33.Rxh5+ Kg7 34.Kg2 Rd2+ 35.Kf3 Kf6 36.h4 Rxb2 37.Ke4 Rh2 38.a4 a5 39.Rh6+ Kg7 40.Rg6+ Kf7 41.Kxe5 Rxh4 42.e4 Rh2 43.c4 Rc2 44.Kd4 Rd2+ 45.Ke3 Ra2 46.e5 Rxa4 47.e6+ Ke7 48.Rg7+ Kd6 49.Rd7+ Kc6 50.f6 Ra1 51.f7 Re1+ 52.Kd4 Rxe6 53.Rxc7+ Kxc7 54.f8Q Ra6 55.Qf4+ Kc8 56.Kc3 a4 57.Kb2 a3+ 58.Ka2 Kd7 59.Qf7+ Kc8 60.Qe8+ Kc7 61.Qe5+ Kc8 62.Qh8+

+1.94/37 31.Rg5 exf4 32.exf4 Rd8 33.Kg2 d5 34.Kg3 Rd6 35.a3 Kh6 36.Kh4 c5 37.Rxh5+ Kg7 38.f6+ Rxf6 39.Rxd5 Rxf4+ 40.Kg3 Rf7 41.Rxc5 Kh6 42.b3 Rg7+ 43.Kf4 Rh7 44.h4 Rf7+ 45.Ke4 Rg7 46.Rg5 Rf7 47.c4 Rf1 48.Rd5 Rh1 49.Rd6+ Kh5 50.Rd7 Re1+ 51.Kf4 Rf1+ 52.Ke5 Re1+ 53.Kd6 b6 54.Rb7 b5 55.cxb5 Rd1+ 56.Kc5 axb5

+1.54/37 31.Rg3 exf4 32.exf4 d5 33.Kg2 c5 34.Kf3 h4 35.Rg5 Rd8 36.h3 b5 37.Rg4 d4 38.cxd4 cxd4 39.Ke2 d3+ 40.Kd2 Kh6 41.Rg6+ Kh5 42.Rg5+ Kh6 43.b3 Rd4 44.Rg4 Kh5 45.f6 Rd8 46.f7 Rf8 47.Rg5+ Kh6 48.Kxd3 Rxf7 49.Ke4 Rc7 50.Kf5 Rc3 51.Kg4 Rc2 52.a4 bxa4 53.bxa4 Rd2 54.Kxh4 Rd4 55.Kg4 Rxa4 56.Re5

Apr-30-16
Premium Chessgames Member
  Jimfromprovidence: <paulalbert> <I got this one without too much difficulty, but partly because I had seen it before. GM Michael Rohde won my first place brilliancy prize for this game that year 1986.>

Thanks for the back story, it was truly a noteworthy performance.

Say black tries 31...Qe8, below, seeing 32...c6, blocking the bishop.


click for larger view

White to play and win.

Apr-30-16  The Kings Domain: Got this after a length of analysis that would make Caruana proud.
Apr-30-16  JASAHA: If this was my game I would have played Be6 and then seen my queen en prise. Luckly there is a win after the Q drops.
May-01-16
Premium Chessgames Member
  paulalbert: <Jimfromprovidence> I think in the position you gave 32 Bf3 should win. Maybe there is something even better. I do not have a chess engine to check it out. In IM Danny Kopec's and GM Lubomir Ftacnik's analysis in the book they give 31.... Qe2 as Black's best try. Then there is no immediate knockout blow and they give some analysis which shows White still having as significant advantage.
May-01-16  Moszkowski012273: Yeah 28.Bxh5... was a quicker way to win.
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