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============================== My email: jotes@go2.pl



Chess engines: Peripheral 1.1.3

on


Peripheral  - UCI chess engine. I'm learning Rust and engine dev as I go, so any feedback is appreciated.
Rating estimate of version `1.0.0`: `~1960` CCRL blitz. Rating CEDR - there have been no tests yet.

Since no PEXT instructions are used yet, the binary should run on all Windows machines.

v.1.1.3:
Changelog
Added extended null move pruning.
UCI additions
position kiwipete
seldepth (furthest depth reached by Qsearch)
Visited nodes are now correctly counted (about 3x as many)
I have also tried NMP, and several common optimizations for NMP and NMR, but they did not gain against the basic null move reduction algorithm. It might be worth to retry these optimizations later, when the engine is hopefully stronger overall.

SPRT
Score of peripheral dev vs peripheral 1.0.0: 158 - 77 - 68  [0.634] 303
...      peripheral dev playing White: 81 - 38 - 33  [0.641] 152
...      peripheral dev playing Black: 77 - 39 - 35  [0.626] 151
...      White vs Black: 120 - 115 - 68  [0.508] 303
Elo difference: 95.2 +/- 35.5, LOS: 100.0 %, DrawRatio: 22.4 %
SPRT: llr 2.92 (100.9%), lbound -2.25, ubound 2.89 - H1 was accepted





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