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Salo Landau vs Gerald Abrahams
Bournemouth (1939), Bournemouth ENG, rd 9, Aug-23
Semi-Slav Defense: Accelerated Move Order (D31)  ·  1-0



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Kibitzer's Corner
Nov-22-13  thomastonk: This game has a lot of interesting pawn structures in his early phases, but I came here to study it for its pawnless ending: this game could possibly be the earliest example of R+N vs 2Ns! begins with a mate in 262 moves. Enjoy, it's simply crazy! BTW, I like Krabbé's humor very much. Here he puts a very nice Lasker picture in an article called "Play chess with God".

Nov-22-13  thomastonk: Though it seems completely out of reach to understand the ending R+N vs 2Ns for a human being, I nevertheless wish to understand a few details at least.

When Black gave away the exchange, he still had a pawn. Position after 62.♔xh2:

click for larger view

The tablebases give a draw for the same position without the pawn a6, so why should this be lost with the pawn. Since the opposite forces are not in direct contact, there have to be stable positions for the defending side.

Black lost the pawn at 78.♔xa6:

click for larger view

Mate in 142! From this fact and the diagram, it seems "natural" to "explain" that Black's forces are no longer able to coordinate.

Nov-22-13  thomastonk: There are stable drawn positions in this ending similar to those in the ending Q vs 2Ns: if the knights stand side by side with the king, then it is a draw, say

click for larger view

Here the coordination cannot be broken down in both endings (neglecting some exceptionial cases, of course). Lost positions in the Q vs 2Ns ending are known to be those, where the knights protect each other.

I went though the example in once again, and part of the mystery seems to be that Black never could reach such a "stable" position, except under very bad conditions, where he had to gave it up immediately, whereas White made somehow little progress. However, I have no idea what this progress is or how it could be described.

Nov-22-13  thomastonk: Back to this game. After 78.♔xa6 White had a mate in 142 moves as noted above. With the 50-move rule that should not loose for Black.

I will give the changes of the optimal result for the following moves according to the tablebases (every change means a "mistake" in this sense).

81.. ♘e3 #50
83.♔d7 #62
83.. ♘c5+ #50
84.♔e8 #57
84.. ♘e6 #49
86.♔d7 #112
86.. ♘c5 #63
87.. ♘g7+ #25
and so on.

Six pieces are far too difficult for us!

PS: A thought back deep into history: king, rook and knight were already part of Shatranj.

Premium Chessgames Member
  Penguincw: What a journey for the white king!

It went from g1-f2-e2-d3-e2-d3-e2-f2-g2-h2-g3-f4-e5-d6-e5-d4-- c5-c6-b6-a6-b7-c6-d7-e8-d7-e8-d8-e7-d6-e5-f4-g5 to f6.

There's not one file or rank it did not land on in this game.

Premium Chessgames Member
  GrahamClayton: 100...♘df7 101. ♘xh6 ♘xh6 102. ♖h5 ♔g8 103. ♖xh6 winning the knight and the game.

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