On-line engine blitz tourney June

Discussion of chess software programming and technical issues.

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Henk
Posts: 7210
Joined: Mon May 27, 2013 10:31 am

Re: On-line engine blitz tourney June

Post by Henk »

Aspiration search III applied when plyCount = 0. Second version rewritten by Sven.

Code: Select all

   
               int WINDOW_MARGIN = 2000;

                int factor = 1;
                int lb = guess.Value - factor * WINDOW_MARGIN;
                int ub = guess.Value + factor * WINDOW_MARGIN;

                           
                while (true)
                {
                    int value = Search(initValue, depth, 0, lb, ub);
                    if (!Position.Expired && &#40;value <= lb || value >= ub&#41;)
                    &#123;
                        factor = factor * 4;
                        if &#40;value <= lb&#41;
                        &#123;
                            lb = guess.Value - factor * WINDOW_MARGIN;
                        &#125;
                        else
                        &#123;
                            ub = guess.Value + factor * WINDOW_MARGIN;
                        &#125;
                     &#125;
                    else break;
                 &#125;
Daniel Anulliero
Posts: 759
Joined: Fri Jan 04, 2013 4:55 pm
Location: Nice

Re: On-line engine blitz tourney June

Post by Daniel Anulliero »

Aspiration windows ? Magic bitboards ?
Sooo you reinvent the wheel too ?
I'm very pleased to read that :lol:
Henk
Posts: 7210
Joined: Mon May 27, 2013 10:31 am

Re: On-line engine blitz tourney June

Post by Henk »

I think I'm too stupid to invent anything new that gives a gain. Or maybe by luck. But old ideas like aspiration windows does not give much either.
Daniel Anulliero
Posts: 759
Joined: Fri Jan 04, 2013 4:55 pm
Location: Nice

Re: On-line engine blitz tourney June

Post by Daniel Anulliero »

Henk wrote:O yes before I forget: Skipper used Aspiration Windows which were giving a huge ELO boost.
:lol:
You guy are very funny ! Huge elo boost ?
It lose in 18 moves against my weak engine Isa ( who is rated 2110 elo , according to CCRL elos)
Please stop writing nonsenses and stop trolling
Thanks