+~111 Elo over the previous version as well as several feature updates.
Strength gains:
-Late move pruning
-Dynamic NMP reduction
-King ring defenders eval function
-Early experiments with SPSA
-Minor optimisations
-Inclusion of fancy magic bitboards to replace software PEXT move gen for older binaries
Feature updates:
-Support for 960/FRC
-Support for "searchmoves" uci function, limiting the nodes searched at root
Additionally you may notice the inclusion of a new BMI2 release binary, this replaces the old AVX2 binary. The new AVX2 build no longer requires PEXT support, making it ideal for Zen 1 and Zen 2 cpus which implement PEXT with slow microcode.