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Ratmir Kholmov vs Leonid Stein
USSR Championship (1962), Yerevan URS , rd 13, Dec-10
Sicilian Defense: Canal Attack. Main Line (B52)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Oct-10-12
Premium Chessgames Member
  Honza Cervenka: 51...Rb1 was a grave mistake. Stein simply overlooked that Pg5 is indirectly covered by fork on h7 when the King stays on f8. After 51...Ke8 white has no way to win all black Pawns without loss of Pg5. The game could continue 51...Ke8 52.Nf2 Kd8 53.Nxh3 Kc8 54.Kg2 Kb8 55.Ra4 Kb7 56.Nf4 Kb6 57.Nxg6 Rb1 58.Rxa2 Rb5 and Pg5 falls with drawish K+R+N vs K+R ending.
Sep-28-16
Premium Chessgames Member
  Sally Simpson: As Honza states 51...Rb1 was a blunder.

Let's look at it from Stein's side of the table. (Black to play)


click for larger view

The only thing that can screw up the plan of getting that White g-pawn off the board and going into a KRN v KR ending is a possible Knight Fork.

But looking at the board the Knight Fork square for g5 and f8 is e6 (remember the board is upside down, we are seeing what Stein saw.)

Everyone knows the pattern, if a Knight is two diagonals away from a square then it takes the Knight at least four moves to get there.

No danger there so Stein played 51...Rb1 (51...Ke8/g8) then he saw what Kholmov saw. There is another g5 f8 Fork with the Knight on h7 and it can get to there in two moves. OOPS!

A great fighting game this one.

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