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Lower smallnet threshold with updated eval divisors

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Params found after 30k spsa games at 60+0.6, with initial
values from 64k spsa games at 45+0.45

First spsa with 64k / 120k games at 45+0.45:
https://tests.stockfishchess.org/tests/view/664a561b5fc7b70b8817c663
https://tests.stockfishchess.org/tests/view/664ae88e830eb9f8866146f9

Second spsa with 30k / 120k games at 60+0.6:
https://tests.stockfishchess.org/tests/view/664be227830eb9f886615a36

Values found at 10k games at 60+0.6 also passed STC and LTC:
https://tests.stockfishchess.org/tests/view/664bf4bd830eb9f886615a72
https://tests.stockfishchess.org/tests/view/664c0905830eb9f886615abf

Passed STC:
https://tests.stockfishchess.org/tests/view/664c139e830eb9f886615af2
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 69408 W: 18216 L: 17842 D: 33350
Ptnml(0-2): 257, 8275, 17401, 8379, 392

Passed LTC:
https://tests.stockfishchess.org/tests/view/664cdaf7830eb9f886616a24
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 35466 W: 9075 L: 8758 D: 17633
Ptnml(0-2): 27, 3783, 9794, 4104, 25

closes https://github.com/official-stockfish/Stockfish/pull/5280

bench 1301287
This commit is contained in:
Linmiao Xu 2024-05-21 13:55:20 -04:00 • committed by Joost VandeVondele
parent c86ec8ec29
commit c14b69790a
1 changed files with 4 additions and 4 deletions
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8
src/evaluate.cpp
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@ -46,7 +46,7 @@ int Eval::simple_eval(const Position& pos, Color c) {
bool Eval::use_smallnet(const Position& pos) { bool Eval::use_smallnet(const Position& pos) {
int simpleEval = simple_eval(pos, pos.side_to_move()); int simpleEval = simple_eval(pos, pos.side_to_move());
return std::abs(simpleEval) > 1126 + 6 * pos.count<PAWN>(); return std::abs(simpleEval) > 1018 + 5 * pos.count<PAWN>();
} }
// Evaluate is the evaluator for the outer world. It returns a static evaluation // Evaluate is the evaluator for the outer world. It returns a static evaluation
@ -73,8 +73,8 @@ Value Eval::evaluate(const Eval::NNUE::Networks& networks,
} }
// Blend optimism and eval with nnue complexity and material imbalance // Blend optimism and eval with nnue complexity and material imbalance
optimism += optimism * (nnueComplexity + std::abs(simpleEval - nnue)) / 584; optimism += optimism * (nnueComplexity + std::abs(simpleEval - nnue)) / 620;
nnue -= nnue * (nnueComplexity * 5 / 3) / 32395; nnue -= nnue * (nnueComplexity * 5 / 3) / 32082;
v = (nnue v = (nnue
* (32961 + 381 * pos.count<PAWN>() + 349 * pos.count<KNIGHT>() * (32961 + 381 * pos.count<PAWN>() + 349 * pos.count<KNIGHT>()
@ -82,7 +82,7 @@ Value Eval::evaluate(const Eval::NNUE::Networks& networks,
+ optimism + optimism
* (4835 + 136 * pos.count<PAWN>() + 375 * pos.count<KNIGHT>() * (4835 + 136 * pos.count<PAWN>() + 375 * pos.count<KNIGHT>()
+ 403 * pos.count<BISHOP>() + 628 * pos.count<ROOK>() + 1124 * pos.count<QUEEN>())) + 403 * pos.count<BISHOP>() + 628 * pos.count<ROOK>() + 1124 * pos.count<QUEEN>()))
/ 32768; / 36860;
// Damp down the evaluation linearly when shuffling // Damp down the evaluation linearly when shuffling
v = v * (204 - pos.rule50_count()) / 208; v = v * (204 - pos.rule50_count()) / 208;