Lazy SMP

[aronpetko]

2 threads vs 1 thread:

Elo   | 115.41 +- 19.56 (95%)
SPRT  | 8.0+0.08s Threads=2 Hash=16MB
LLR   | 2.90 (-2.25, 2.89) [0.00, 5.00]
Games | N: 518 W: 226 L: 60 D: 232
Penta | [1, 21, 80, 125, 32]
https://chess.aronpetkovski.com/test/2261/

1 thread vs 1 thread (simplification bounds):

Elo   | 6.23 +- 5.52 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=16MB
LLR   | 2.90 (-2.25, 2.89) [-5.00, 0.00]
Games | N: 5410 W: 1477 L: 1380 D: 2553
Penta | [82, 590, 1261, 693, 79]
https://chess.aronpetkovski.com/test/2263/