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Chess World Online Chess Forum - Underpromotion Study by Rusinek

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  Underpromotion Study by Rusinek

kingscrusher

Chess rating: 1585 Fide 2135
LCF 200 Fide approx. 2250
British Regional Master






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Sun May 28 2006 12:25PM | edited: 12:32:52 | MsgID: 4324680


Originally posted by: "Banoboy, Earl of Norfolk"
This is even better than the one I posted (#1209). I have to admit, I had to look at the solution, as I would have never solved this. However, I still don't see how White would be mated if 8.b8=Q, or, for that matter, why the promotion to Bishop is useful.




I don't want to spoil it as to why b8=Q leads to mate. I can give a clue though - the queen is more flexible if White played Ba6+ and therefore a draw by stalemate is not possible. Mate would be delivered by a knight :)

This composition won 1st prize in the New Statesman tournament 1971

P.S. I have detailed the mate in the actual Puzzle's database now. But not below.

The underpromotion to the Bishop helps achieve a draw by Stalemate. I think I need to put this in the chess forum as well!



Earl of Norfolk

Chess rating: 2497





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Sun May 28 2006 11:27AM | edited: 11:35:43 | MsgID: 4324444


This is even better than the one I posted (#1209). I have to admit, I had to look at the solution, as I would have never solved this. However, I still don't see how White would be mated if 8.b8=Q, or, for that matter, why the promotion to Bishop is useful.



kingscrusher

Chess rating: 1585 Fide 2135
LCF 200 Fide approx. 2250
British Regional Master






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Sun May 28 2006 8:48AM | MsgID: 4323790


Puzzle Challenge #1210 set by kingscrusher

Puzzle name: Study by Rusinek
Game Year: 1971
Tournament: New Statesman
Composer: Rusinek
Theme: Underpromotion
Goal: White to play and draw

Solve the position using the Interactive board below. Click on a piece to move it, then click destination square



Mark as solved | Link from homepage

For more puzzles check out the Chessworld puzzle database