Gecko 0.08 - new version chess engine

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Gecko - UCI chess engine
Author: Bingwen Yang (China)
Gecko, a C++​ chess engine created by sgtqwq, a 14-year-old middle school student in China.

Gecko 0.08 what's new?

Elo ~2345.
Note that avx2 might not be the fastest version.On my R5 3600G,the oldest legacy version is the fastest,I don't know why.

Score of gecko_avx2 vs stash-18.0-windows-x86_64-bmi2: 36 - 44 - 20 [0.460]
... gecko_avx2 playing White: 15 - 27 - 8 [0.380] 50
... gecko_avx2 playing Black: 21 - 17 - 12 [0.540] 50
... White vs Black: 32 - 48 - 20 [0.420] 100
Elo difference: -27.9 +/- 61.6, LOS: 18.6 %, DrawRatio: 20.0 %
SPRT: llr 0 (0.0%), lbound -inf, ubound inf
100 of 100 games finished.

Player: gecko_avx2



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