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Chess engine: Wahoo 3.0.0 (for Windows and Linux)

on


Wahoo - UCI chess engine  Rating CEDR=1761
Author: Andrew Hockman

v.3.0.0:
New Engine Features
Check Extensions: +40 Elo #66
Bishop Pair Bonus: +10 Elo #70
Mobility Eval: +68 Elo #73
Soft Cutoff Time Management: +10 Elo #77
King Safety Eval: +34 Elo #78
Killer Bugfix: + 20 Elo #81
Isolated Pawn Eval: +26 Elo #82
Pawn Phalanx Eval: #83
Threats Eval: #84
Better NMP Formula: +20 Elo #86
Forward Mobility Eval: +15 Elo #90
Tempo Bonus: +32 Elo #87
Better TT Replacement Scheme: + 5 Elo #96
Aspiration Windows: +90 Elo #97
TT De-aging: +4 Elo #99
Save Bestmove during Aspiration Fail High: +9 Elo #98
Lazy SMP: +74 Elo (when enabled) #100
Internal Iterative Reduction: +15 Elo #101
Movestogo Time Management: +22 Elo (when movestogo is enabled) #102
More Aggressive RFP and LMR: +22 Elo #103
5-man Syzygy Tablebase: +20 Elo (when enabled) #104
No Upperbound TT Move Storage: +42 Elo #106
TT in Qsearch: +12 Elo #107
Aspiration Window Time Management: +10 Elo #109
Known Issues
Wahoo sometimes reports bogus mate scores that are far more distant than they actually are, such as reporting M56 when it is actually M8. It will still make progress towards the mate though.
Binaries
Wahoo's release scheme follows the microarchitecture levels.

x86_64-v1 is the slowest but compatible with almost anything.
x86_64-v2 is faster but is compatible with CPUs pre-Haswell/Excavator.
x86_64-v3 is faster still and recommended on modern systems.
x86_64-v4 is the fastest but requires AVX-512 support.


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