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SugaR PrO Release Candidate 1 Engine

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SugaR PrO Release Candidate 1 Engine

Post  gary on Thu Aug 20, 2015 10:23 am


SugaR PrO Release Candidate 1
Bench: 9457045
Additions
Add old eval weights UCI options
Introduces Symmetric king safety
Better and more effective than "Aggressiveness and Cowardice"
https://github.com/Zerbinati/SugaR-Chess-PrO/commit/088cb29660cf2d3689da441e937fe55ea92c0e31
SPSA Hanging
https://github.com/Zerbinati/SugaR-Chess-PrO/commit/39714bd8427aed3ed6acf855199531f649ba25c8
Add parameters adjustment Mg\Eg
master
commit 39714bd8427aed3ed6acf855199531f649ba25c8 1 parent 16cf848
Zerbinati authored

EG-Reduction (Update search.cpp
https://github.com/Zerbinati/SugaR-Chess-PrO/commit/16cf8480d840de70eafd5cfcc7ee96076b206550
VoyagerOne authored

Less futility + more SE (10442788)
https://github.com/Zerbinati/SugaR-Chess-PrO/commit/22f5eca60f378b43cf7765e3652f6952fed98b56
- stop futility pruning one depth lower
- start singular extension one depth lower
- compensate by retuning futility_margin()

Hopefully this can be both an elo gain and an improvement in tactics.
test
commit bb72fd68c5e1e5a76936dd417e7b3dc67bf21582 1 parent 9dbb3ae
lucasart authored

TT entry value based on depth and relative age
https://github.com/Zerbinati/SugaR-Chess-PrO/commit/986197934f19ada709e2088e2690cb613a6f4c3e
Calculate TT replace value as depth minus eight times relative age.

STC 2MB
LLR: 2.96 (-2.94,2.94) [0.00,4.00]
Total: 45258 W: 8595 L: 8279 D: 28384

LTC 8MB
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 56401 W: 8809 L: 8489 D: 39103

STC 16MB
LLR: 2.96 (-2.94,2.94) [-4.00,0.00]
Total: 34764 W: 6565 L: 6529 D: 21670

Bench: 9069474

Resolves #395
master
commit 9dbb3ae8b2c5ef4ad2b399a42707ad1fd851c68b 1 parent f4ace94
mstembera authored

Deletions
Retire Search log

SRC
https://github.com/Zerbinati/SugaR-Chess-PrO

Engines
http://mzerbinati.wix.com/sugarchess#!compiles/cee5

gary

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