Halogen 15 - new version chess engine

Halogen - UCI chess engine
Author: Kieren Pearson Rating Chess Engines Diary CEDR=3544

Elo gaining patches:

Apply 4-ply continuation history for quiet move ordering by @KierenP in #695

Increase RFP margin for positions with active threats that need to be resolved by @KierenP in #696

SPSA LTC tune by @KierenP in #697

Add Continuation Correction History by @KierenP in #698

Threat history should consider all threats, on both from and to square by @KierenP in #699

Include Knight capture Bishop as a threat for threat calculations by @KierenP in #700

Reduce search depth on root fail high by @KierenP in #701

Apply double negative extensions for non-singular cut ndoes by @KierenP in #702

Apply double negative extensions to near multi-cut nodes by @KierenP in #703

SPSA LTC tune by @KierenP in #705

Adjust good loud move margin to -100 by @KierenP in #710

Scale good loud SEE margin by move history by @KierenP in #712

Use AVX512_VBMI2 instructions to speed up movegen by @KierenP in #717

Use compress_epi16 to process 32 blocks of 4 FT activations at once by @KierenP in #719

SPSA LTC tune by @KierenP in #721

Make qsearch detect checkmate positions by @KierenP in #725

Randomize all draw scores by @KierenP in #730

Prefetch TT entries in qsearch by @KierenP in #728

Add ProbCut heuristic by @KierenP in #734

Hoist pinned checks in movegen by @87flowers in #735

Elo gain compared to Halogen 14:

Elo | 33.74 +- 4.79 (95%)

Conf | 40.0+0.40s Threads=1 Hash=8MB

Games | N: 5000 W: 1442 L: 958 D: 2600

Penta | [10, 368, 1262, 848, 12]

http://chess.grantnet.us/test/40085/

Halogen 15 download

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