Fizbo 1.8 released
Posted: Sat Aug 27, 2016 12:03 am
Version 1.8 of Fizbo chess engine has just been released. It can be downloaded from https://sites.google.com/site/fizbochessengine/
Here are release notes:
1. added BMI2 executable.
2. reworked and improved pondering logic, fixing pondering time-out bug. Now the engine should never time out, with or without pondering.
3. reworked parallel search logic. Now it should scale a lot better running on >4 CPUs. This also fixed a bug that sometimes crashed the engine when running on 10 or more CPUs. This bug manifested itself during TCEC9, where Fizbo kept crashing running on 20 cores, and had to be restricted to 10 cores. And it still crashed once. Scaling for 4 CPUs appears to be largely unchanged (still not very good).
4. multiple small changes to search and evaluation, resulting in approximately +40 ELO improvement in playing strength.
Youri.
Here are release notes:
1. added BMI2 executable.
2. reworked and improved pondering logic, fixing pondering time-out bug. Now the engine should never time out, with or without pondering.
3. reworked parallel search logic. Now it should scale a lot better running on >4 CPUs. This also fixed a bug that sometimes crashed the engine when running on 10 or more CPUs. This bug manifested itself during TCEC9, where Fizbo kept crashing running on 20 cores, and had to be restricted to 10 cores. And it still crashed once. Scaling for 4 CPUs appears to be largely unchanged (still not very good).
4. multiple small changes to search and evaluation, resulting in approximately +40 ELO improvement in playing strength.
Youri.
