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ShashChess 25.1

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@amchess amchess released this 19 Oct 22:14
· 110 commits to master since this release

ShashChess 25.1
Fixed mcts by Shashin
Stockfish patch
Fix tablebase probe for dtz >1000 w/o 50 move rule
For qn4N1/6R1/3K4/8/B2k4/8/8/8 w - - 0 1, white loses with DTZ 1034.
See https://syzygy-tables.info/?fen=qn4N1/6R1/3K4/8/B2k4/8/8/8_w_-_-_0_1

Prior to this fix, due to a too small hard-coded value, Stockfish interpreted this as winning.
The new value picked (1<<18) is large enough to deal with the largest DTZ values that can be stored in the current syzygy format.

closes #4187

No functional change.