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Subject: Rook & Pawn Ending with Perpetual Check and Stalemate

Author: Ferdinand S. Mosca

Date: 06:22:57 03/31/01


Hi everyone,

A position from an actual game which caught my interest while
playing an engine match at G60.

[D]3r4/5k2/5p2/6pp/5p2/1p6/p2R4/K3R3 b - - 0 1
Is there any program that can evaluate this simple ending logically.

The trap here is the move ...Rxd2, this may not win but it only draws.
There is perpetual check and stalemate if black plays ...Rxd2. Many programs
probably find the perpetual coming, but at what time do your favorite programs
give a 0.0 or near 0.0 score?

If it finds the perpetual check, which it can find, would a program dare to play
the black side kr+pawns vs. krr?

This position is actually not a draw but a win by black.
I think ...Rb8 will win or maybe other moves.

[D]3r4/5k2/5p2/6pp/5p2/1p6/p2R4/K3R3 b - - 0 1

Regards,
Dinan



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