Search found 58 matches

by bnst
Thu Feb 18, 2016 12:44 pm
Forum: Computer Chess Club: General Topics
Topic: Funny mate in 6
Replies: 59
Views: 10610

Re: Funny mate in 16!

[d]8/1p1p1p1p/3P1P2/pp5P/kp6/1p4P1/1P4P1/2K5 w - - 0 1 Now this is a well known theme and a computer solves it in no time. It is fun though to solve it yourself since it has some tricky variations. But the really funny part is that if you decide that only knight promotions are legal you can solve it...
by bnst
Fri Feb 27, 2015 9:36 am
Forum: Computer Chess Club: General Topics
Topic: Million Mate Madness
Replies: 44
Views: 13912

Re: Million Mate Madness

I made a simple perl script that check for illegal number of pieces and illegal FEN and illegeal number of pawns and it found 2972 errors.
The most were pawns on the first or last row and the rest 201 errors were more than eight pawns of one colour.
Regards Andreas
by bnst
Wed Feb 25, 2015 10:50 am
Forum: Computer Chess Club: General Topics
Topic: Million Mate Madness
Replies: 44
Views: 13912

Re: Million Mate Madness

I tried to hint that they are the same :)
by bnst
Wed Feb 25, 2015 9:45 am
Forum: Computer Chess Club: General Topics
Topic: Million Mate Madness
Replies: 44
Views: 13912

Re: Million Mate Madness

There are 46 positions with ce -32755 which means that the colour that does not move mates.
Regards Andreas
by bnst
Wed Feb 25, 2015 8:43 am
Forum: Computer Chess Club: General Topics
Topic: Million Mate Madness
Replies: 44
Views: 13912

Re: Million Mate Madness

I have now solved 1112567 myself but I struggle with the 1112568th :) If you add 1543 more you will have exactly 0x110000 which of course should be celebrated ! Seriously - how is it possible to collect so many - if you spent 1 minute on each you would have used more than two years if you worked rou...
by bnst
Fri Jul 25, 2014 11:23 am
Forum: Computer Chess Club: General Topics
Topic: Engines can't solve this puzzle (even not Stockfish 5)
Replies: 37
Views: 6177

Re: Engines can't solve this puzzle (even not Stockfish 5)

How did you disable null-move. By changing the source or in some simpler way ?
I would like to try this when I analyze certain positions.
Regards
Andreas
by bnst
Thu Jul 17, 2014 10:13 am
Forum: Computer Chess Club: General Topics
Topic: The chess position with the most possible legal moves?
Replies: 14
Views: 2622

Re: The chess position with the most possible legal moves?

Here is a link to a 64-bit compile and a new 32-bit compile. The performance seems to be the same as the old one though: https://drive.google.com/file/d/0B3_wqC7gzVdEcWlqemo2dUwtdXc/edit?usp=sharing This is a very old program with a rather obscure interface, but to get all the statistics run it like...
by bnst
Wed Jul 16, 2014 11:02 am
Forum: Computer Chess Club: General Topics
Topic: The chess position with the most possible legal moves?
Replies: 14
Views: 2622

Re: The chess position with the most possible legal moves?

I am the author of the joined program. It is very old now, but if somebody need a 64-bit compile or other versions of the program I might be able to make it available.
Regards
Andreas
by bnst
Wed May 14, 2014 8:12 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish zero evals
Replies: 27
Views: 6588

Re: Stockfish zero evals

Thanks for a good explanation. I always wondered about why Stockfish did this. You can't argue with solid data :)

Regards
Andreas
by bnst
Fri May 09, 2014 12:13 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish zero evals
Replies: 27
Views: 6588

Re: Stockfish zero evals

There might be an other explanation. Stockfish has a bit primitive way of detecting repeated positions. If a positions has occured in the game and Stockfish finds this position during the search it will return a draw score. Other engines only do this if the position has occured twice in the game, bu...