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Author: Linmiao Xu
Date: Wed Jun 12 09:17:04 2024 +0200
Timestamp: 1718176624

Give positional output more weight in nnue eval

This effectively reverts the removal of delta in:
https://github.com/official-stockfish/Stockfish/pull/5373

Passed STC:
https://tests.stockfishchess.org/tests/view/6664d41922234461cef58e6b
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 56448 W: 14849 L: 14500 D: 27099 Elo +2.15
Ptnml(0-2): 227, 6481, 14457, 6834, 225

Passed LTC:
https://tests.stockfishchess.org/tests/view/666587a1996b40829f4ee007
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 91686 W: 23402 L: 22963 D: 45321 Elo +1.66
Ptnml(0-2): 78, 10205, 24840, 10640, 80

closes https://github.com/official-stockfish/Stockfish/pull/5382

bench 1160467
see source