Author: Robert Hyatt
Date: 08:32:26 03/02/06
Go up one level in this thread
On March 02, 2006 at 00:26:08, Charles Roberson wrote:
>
> Came across this position by accident browsing chess club web sites.
> It comes from the Duke University Chess Club. The position is
> 1r5k/4NP1b/7K/8/6R1/8/8/8 w - - 0 1
>
> Telepath found the mate in 4 but could not find the mate in 3.
> After some debugging I found out why!!!
>
> Just before the final ply in the mate in 3, Telepath announced insufficent
> material which is true. But in this position you can mate with insufficient
> material.
>
> It put such a smile on my face, I had to share it.
>
> Maybe some of you have the same logic flaw in your code.
That is at least one bug I do not have. :)
1 0.00 4.60 1. Rg7
1-> 0.00 4.60 1. Rg7
2 0.00 4.24 1. Rg7 Be4
2 0.00 +1 1. Rg8+!!
2 0.00 +3 1. Rg8+!!
2 0.00 +M 1. Rg8+!!
2 0.00 Mat03 1. Rg8+ Rxg8 2. fxg8=Q+ Bxg8 3. Ng6#
2-> 0.00 Mat03 1. Rg8+ Rxg8 2. fxg8=Q+ Bxg8 3. Ng6#
3 0.00 Mat03 1. Rg8+ Rxg8 2. fxg8=Q+ Bxg8 3. Ng6#
3-> 0.00 Mat03 1. Rg8+ Rxg8 2. fxg8=Q+ Bxg8 3. Ng6#
4 0.05 Mat03 1. Rg8+ Rxg8 2. fxg8=Q+ <EGTB>
4-> 0.06 Mat03 1. Rg8+ Rxg8 2. fxg8=Q+ <EGTB>
5 0.07 Mat03 1. Rg8+ Rxg8 2. fxg8=Q+ <EGTB>
5-> 0.08 Mat03 1. Rg8+ Rxg8 2. fxg8=Q+ <EGTB>
time=0.08 mat=1 n=3803 fh=98% nps=1.00M
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