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Fix rootComplexity calculation

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The calculation of rootComplexity can't call eval when in check.
Doing so triggers an assert if compiled in debug mode when
the rootpos is evaluated using classical eval.

Fixes https://github.com/official-stockfish/Stockfish/issues/4512

Passed STC:
https://tests.stockfishchess.org/tests/view/6432697431feee5c6d306876
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 41096 W: 11017 L: 10815 D: 19264
Ptnml(0-2): 113, 4172, 11780, 4366, 117

Running LTC:
https://tests.stockfishchess.org/tests/view/6432974d31feee5c6d306fc0
LLR: 1.76 (-2.94,2.94) <-1.75,0.25>
Total: 73200 W: 19792 L: 19728 D: 33680
Ptnml(0-2): 24, 6659, 23182, 6699, 36

closes https://github.com/official-stockfish/Stockfish/pull/4515

No functional change
This commit is contained in:
Joost VandeVondele 2023-04-09 09:18:29 +02:00
parent 59f2085469
commit b36d39de3d
3 changed files with 9 additions and 4 deletions
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2
src/evaluate.cpp
View file

@ -1048,6 +1048,8 @@ make_v:
Value Eval::evaluate(const Position& pos, int* complexity) {
assert(!pos.checkers());
Value v;
Value psq = pos.psq_eg_stm();

10
src/search.cpp
View file

@ -295,10 +295,12 @@ void Thread::search() {
if (mainThread)
{
int rootComplexity;
Eval::evaluate(rootPos, &rootComplexity);
mainThread->complexity = std::min(1.03 + (rootComplexity - 241) / 1552.0, 1.45);
if (!rootPos.checkers())
{
int rootComplexity;
Eval::evaluate(rootPos, &rootComplexity);
mainThread->complexity = std::min(1.03 + (rootComplexity - 241) / 1552.0, 1.45);
}
if (mainThread->bestPreviousScore == VALUE_INFINITE)
for (int i = 0; i < 4; ++i)

1
src/thread.cpp
View file

@ -160,6 +160,7 @@ void ThreadPool::clear() {
main()->bestPreviousScore = VALUE_INFINITE;
main()->bestPreviousAverageScore = VALUE_INFINITE;
main()->previousTimeReduction = 1.0;
main()->complexity = 1.0;
}