Author: Christophe Theron
Date: 19:42:27 04/12/00
Go up one level in this thread
On April 12, 2000 at 18:36:06, ujecrh wrote:
>On April 12, 2000 at 18:13:03, Eran wrote:
>
>>
>>I hope Junior 6 can underpromote a pawn into a knight, doesn't it?
>>
>>Eran
>
>I do not have junior but give it the following position, if it does not find the
>mate in 1 then it does not support underpromotion (I would be amazed !):
>
>8/5P1k/7p/7P/8/8/1B6/6RK w - - 0 1
I think it's not a very good test. Generally, chess programs use a different
move generation/ordering at the root and in the rest of the tree.
So you should find a test that involves an underpromotion several plies deep in
the tree.
Incidentally, someone posted a position some time ago. It was a mate in 8. It
involved an underpromotion to a Knight at move 2 or 3 (I don't remember
exactly).
Junior6 was able to solve this, so I deduce that it is able to handle
underpromotions correctly. It is an improvement over Junior5, which failed on
underpromotions problems.
I think I have found the position. Mate in 8 involving underpromotion to knight:
[D]r7/p1pRpP1n/K3Pp1b/5B1n/4NkP1/2B5/2N1Pp2/1b6 w - -
Christophe
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