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Add functions to check for decisive scores

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Thanks to peregrineshahin and robbyrobbyrob for their suggestions.

closes https://github.com/official-stockfish/Stockfish/pull/5696

No functional change
This commit is contained in:
Nonlinear2
2024-11-22 11:24:43 +01:00
committed by Disservin
parent 70bb317afe
commit 57e06be71f
5 changed files with 58 additions and 51 deletions
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src/thread.cpp
+5 -5
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@@ -329,13 +329,13 @@ Thread* ThreadPool::get_best_thread() const {
const auto bestThreadMoveVote = votes[bestThreadPV[0]];
const auto newThreadMoveVote = votes[newThreadPV[0]];
const bool bestThreadInProvenWin = bestThreadScore >= VALUE_TB_WIN_IN_MAX_PLY;
const bool newThreadInProvenWin = newThreadScore >= VALUE_TB_WIN_IN_MAX_PLY;
const bool bestThreadInProvenWin = is_win(bestThreadScore);
const bool newThreadInProvenWin = is_win(newThreadScore);
const bool bestThreadInProvenLoss =
bestThreadScore != -VALUE_INFINITE && bestThreadScore <= VALUE_TB_LOSS_IN_MAX_PLY;
bestThreadScore != -VALUE_INFINITE && is_loss(bestThreadScore);
const bool newThreadInProvenLoss =
newThreadScore != -VALUE_INFINITE && newThreadScore <= VALUE_TB_LOSS_IN_MAX_PLY;
newThreadScore != -VALUE_INFINITE && is_loss(newThreadScore);
// We make sure not to pick a thread with truncated principal variation
const bool betterVotingValue =
@@ -355,7 +355,7 @@ Thread* ThreadPool::get_best_thread() const {
bestThread = th.get();
}
else if (newThreadInProvenWin || newThreadInProvenLoss
|| (newThreadScore > VALUE_TB_LOSS_IN_MAX_PLY
|| (!is_loss(newThreadScore)
&& (newThreadMoveVote > bestThreadMoveVote
|| (newThreadMoveVote == bestThreadMoveVote && betterVotingValue))))
bestThread = th.get();