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Hi everybody :), suppose I got convinced my engine does better in very complex positions (wich it does not) and I want my engine to prefer positions with many queens for example. since the root_ply=1, I do the following in the eval: //some_weight could be 10 for example (pawn=100, queen=1000), //WQ...

Thanks a lot to both. Really useful

Hi. Sorry if this has already been answered before. I'm trying to compile an old engine of mine in 64 bits. I have some old asm code for FirstOne() (left and right, I mean, MSB and LSB) which won't compile for X64. Is there some C code out there I can use for the tasks? I don't care much for speed. ...

Got an idea yesterday based on an old idea I never got to work. It's about doing LMR at root moves. LMR at root moves hurts my engine but not that much. Now that I have added special code to it I get a nice improvement by fooling Alpha-Beta (AB) till a given iteration depth. The idea is to do the f...

The first chess program I recall (non for PC) was Masterchess, for the Amstrad (I don't remember the author). Next ones, also for the Amstrad, were Cyrus II (Richard Lang) and Colossus 3 or 4 (Martin Bryant).

Those of the Amstrad were good days...

Here is another example for the huge positional score of chess programs(probably also includes IvanHoe that I did not install in my computer and at least it includes robbolito0.09w32 and houdini that gives more than +4 for white at depth 1 when the program cannot see the promotion by search because...

Here is another example for the huge positional score of chess programs(probably also includes IvanHoe that I did not install in my computer and at least it includes robbolito0.09w32 and houdini that gives more than +4 for white at depth 1 when the program cannot see the promotion by search because...

I'm using winboard engines now, so that trick won't work. Note that the trick also won't work on UCI engines, not even on those that support the option Ponder. That is, it will set their option Ponder to on, but that will not make them ponder. It will just mess up their time control. I don't know h...

Hi. I'm giving a try to cutechess-cli. I can't find a way to set ponder=on. Is it possible? If not, what other command-line tool would you recommend for two programs matchs with ponder on (the easier to use, the better)? Hi José, I think you can include a command in the 'each' section of the comman...

Hi. I'm giving a try to cutechess-cli. I can't find a way to set ponder=on. Is it possible? If not, what other command-line tool would you recommend for two programs matchs with ponder on (the easier to use, the better)? Hi José, I think you can include a command in the 'each' section of the comman...