1.9

Changes

• added evaluation parameter for pawns with two neighbors
• added evaluation parameter for sliding pieces attacking the area around the enemy king
• removed evaluation parameter for rooks on second rank to king
• added king square contextual piece square tables
• optimized evaluation parameters using gradient descent
• now if a move is already at the first position of the killer moves it won't be added again

Use the modern binaries if your CPU supports BMI2 and POPCOUNT.

Intel CPUs including and after Haswell (2013) support BMI2 and POPCOUNT.
AMD CPUs including and after Zen 1 (2017) support BMI2 and POPCOUNT.

1.8.1

Changes

• fixed frequent timeouts in time controls without increment
• fixed some bugs
• improved evaluation speed
• futility pruning is now more aggressive

Use the modern binaries if your CPU supports BMI2 and POPCOUNT.

Intel CPUs including and after Haswell (2013) support BMI2 and POPCOUNT.
AMD CPUs including and after Zen 1 (2017) support BMI2 and POPCOUNT.

1.8

Use the modern binaries if your CPU supports BMI2 and POPCOUNT.

Intel CPUs including and after Haswell (2013) support BMI2 and POPCOUNT.
AMD CPUs including and after Zen 1 (2017) support BMI2 and POPCOUNT.