Chess engine: Stockfish 22041721 NNUE for Windows and Linux (+4,41 ELO)

Stockfish - UCI chess engine, compiled by KJE-98
Rating CEDR=3497 (2 place)

Timestamp: 1650224285

Decrease LMR at PV nodes with low depth.

This patch lessens the Late Move Reduction at PV nodes with low depth. Previously the affect of depth on LMR was independant of nodeType. The idea behind this patch is that at PV nodes, LMR at low depth is will miss out on potential alpha-raising moves.

Passed STC:

https://tests.stockfishchess.org/tests/view/625aa867d3367522c4b8965c

LLR: 2.93 (-2.94,2.94) <0.00,2.50>

Total: 19360 W: 5252 L: 5006 D: 9102 Elo +4.41

Ptnml(0-2): 79, 2113, 5069, 2321, 98

Passed LTC:

https://tests.stockfishchess.org/tests/view/625ae844d3367522c4b8a009

LLR: 2.94 (-2.94,2.94) <0.50,3.00>

Total: 39264 W: 10636 L: 10357 D: 18271 Elo +2.47

Ptnml(0-2): 18, 3928, 11473, 4183, 30

bench: 8129754