Implement collective thread voting for soft stop #706
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Allow threads to collectively decide when to stop searching
based on a majority vote.
MTC SMP 8th
Elo | 4.48 +- 2.94 (95%)
SPRT | 25.0+0.25s Threads=8 Hash=512MB
LLR | 2.89 (-2.25, 2.89) [0.00, 4.00]
Games | N: 11092 W: 2797 L: 2654 D: 5641
Penta | [0, 1072, 3259, 1215, 0]
https://recklesschess.space/test/11331/
VSTC SMP 8th
Elo | 1.21 +- 1.64 (95%)
SPRT | 5.0+0.05s Threads=8 Hash=256MB
LLR | 0.67 (-2.25, 2.89) [0.00, 4.00]
Games | N: 39778 W: 9866 L: 9728 D: 20184
Penta | [46, 4369, 10898, 4553, 23]
https://recklesschess.space/test/11325/
VSTC SMP 16th
Elo | 2.59 +- 2.02 (95%)
SPRT | 5.0+0.05s Threads=16 Hash=512MB
LLR | 2.91 (-2.25, 2.89) [0.00, 4.00]
Games | N: 25394 W: 6384 L: 6195 D: 12815
Penta | [11, 2710, 7062, 2907, 7]
https://recklesschess.space/test/11354/
Bench: 3214551