Razor more if ss+1 cutoffCnt > 3

[candirufish]

Razor more if ss+1 cutoffCnt > 3

STC:
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 221760 W: 56726 L: 56144 D: 108890
Ptnml(0-2): 655, 25453, 58123, 25953, 696
https://tests.stockfishchess.org/tests/view/651d34dbcff46e538ee05d91

LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 130326 W: 33188 L: 32681 D: 64457
Ptnml(0-2): 69, 13949, 36620, 14456, 69
https://tests.stockfishchess.org/tests/view/651f844eac577114367273d5

bench: 1265975

[vondele]

As discussed in discorded, we have one test where this patch triggers a mated-in reported in fewer than the optimal move sequence. This is probably a pre-existing condition, but this patch makes it somewhat more likely. It is something to look into in the future.

[vondele]

Found mate #-5 (better) for FEN "6k1/2B5/6p1/2K2p2/6n1/8/4n3/2q5 w - -".
go nodes 1000000:
info depth 30 seldepth 15 multipv 1 score mate -5 nodes 1000552 nps 1299418 hashfull 274 tbhits 0 time 770 pv c5d6 g4e5 d6e7 c1c7 e7f6 c7d6 f6g5 e5f7 g5h4 d6h2

[peregrineshahin]

Found mate #-5 (better) for FEN "6k1/2B5/6p1/2K2p2/6n1/8/4n3/2q5 w - -". go nodes 1000000: info depth 30 seldepth 15 multipv 1 score mate -5 nodes 1000552 nps 1299418 hashfull 274 tbhits 0 time 770 pv c5d6 g4e5 d6e7 c1c7 e7f6 c7d6 f6g5 e5f7 g5h4 d6h2

applying the prove-mated PR #4990 retroactively
Solves this https://github.com/peregrineshahin/Stockfish/tree/candriu-patch

$ ./stockfish.exe
Stockfish dev-20240115-nogit by the Stockfish developers (see AUTHORS file)
position fen 6k1/2B5/6p1/2K2p2/6n1/8/4n3/2q5 w - -
go nodes 1000000
info string NNUE evaluation using nn-0000000000a0.nnue
info depth 1 seldepth 1 multipv 1 score cp -854 nodes 7 nps 2333 hashfull 0 tbhits 0 time 3 pv c5d6
info depth 2 seldepth 2 multipv 1 score cp -854 nodes 17 nps 4250 hashfull 0 tbhits 0 time 4 pv c5d6
info depth 3 seldepth 2 multipv 1 score cp -854 nodes 22 nps 5500 hashfull 0 tbhits 0 time 4 pv c5d6
info depth 4 seldepth 2 multipv 1 score cp -893 nodes 64 nps 10666 hashfull 0 tbhits 0 time 6 pv c5b6
info depth 5 seldepth 3 multipv 1 score cp -865 nodes 131 nps 16375 hashfull 0 tbhits 0 time 8 pv c5b6 c1e3 b6c6
info depth 6 seldepth 4 multipv 1 score cp -892 nodes 205 nps 20500 hashfull 0 tbhits 0 time 10 pv c5b6 c1b2 b6a6 b2a2 c7a5
info depth 7 seldepth 6 multipv 1 score cp -866 nodes 290 nps 26363 hashfull 0 tbhits 0 time 11 pv c5b6 c1b1 b6c6
info depth 8 seldepth 6 multipv 1 score cp -857 nodes 595 nps 37187 hashfull 0 tbhits 0 time 16 pv c5b6 c1b2 b6a6 b2a1 a6b7 a1h1 b7b8
info depth 9 seldepth 9 multipv 1 score cp -860 nodes 1283 nps 49346 hashfull 0 tbhits 0 time 26 pv c5b6 c1g1 b6c6
info depth 10 seldepth 9 multipv 1 score cp -870 nodes 2042 nps 55189 hashfull 0 tbhits 0 time 37 pv c5b6 c1b2 b6a6 b2a1 a6b7 a1h1 b7a7 e2d4
info depth 11 seldepth 9 multipv 1 score cp -884 nodes 3867 nps 64450 hashfull 1 tbhits 0 time 60 pv c5d6 c1d2 d6c6 e2d4 c6b7 d2g2 b7b8
info depth 12 seldepth 12 multipv 1 score cp -907 nodes 8460 nps 74867 hashfull 3 tbhits 0 time 113 pv c5b6 g4f6 b6b7 e2d4 b7c8 c1c6
info depth 13 seldepth 11 multipv 1 score cp -951 nodes 17325 nps 70714 hashfull 6 tbhits 0 time 245 pv c5b6 e2d4 b6a6 c1c6 c7b6 c6a8 b6a7 a8c8 a6a5
info depth 14 seldepth 16 multipv 1 score cp -978 nodes 49758 nps 84192 hashfull 13 tbhits 0 time 591 pv c5b6 e2d4 c7d8 c1c6 b6a7 c6d7 a7a6 d7d8
info depth 15 seldepth 20 multipv 1 score cp -1005 nodes 77750 nps 88857 hashfull 20 tbhits 0 time 875 pv c5d6 e2d4 d6d5 c1c6 d5d4 c6c7 d4d3 g4f6 d3d4 f6e4 d4e3 c7b6 e3f4
info depth 16 seldepth 24 multipv 1 score mate -20 nodes 118559 nps 91059 hashfull 33 tbhits 0 time 1302 pv c5d6 e2d4 d6d5 c1c6 d5d4 c6c7 d4d5 c7b6 d5c4 g4f6 c4d3 f6e4 d3c2 g8f7 c2c1 b6c5 c1b2
 f5f4 b2b3
info depth 17 seldepth 19 multipv 1 score mate -20 nodes 120713 nps 91380 hashfull 33 tbhits 0 time 1321 pv c5d6 e2d4 d6d5 c1c6 d5d4 c6c7 d4d5 c7b6 d5c4 g4f6 c4d3 f6e4 d3c2 g8f7 c2c1 b6c5 c1b2
 f5f4 b2b3
info depth 18 seldepth 23 multipv 1 score mate -8 nodes 129183 nps 91619 hashfull 33 tbhits 0 time 1410 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c5 d4d3 c5c3 d3e2 c3d2 e2f1 d2f2
info depth 19 seldepth 15 multipv 1 score mate -7 nodes 134368 nps 91781 hashfull 35 tbhits 0 time 1464 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c2 d4d5 c2c5 d5e6 c5d6
info depth 20 seldepth 15 multipv 1 score mate -7 nodes 139444 nps 91679 hashfull 36 tbhits 0 time 1521 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c2 d4d5 c2c5 d5e6 c5d6
info depth 21 seldepth 15 multipv 1 score mate -7 nodes 149006 nps 91023 hashfull 38 tbhits 0 time 1637 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c2 d4d5 c2c5 d5e6 c5d6
info depth 22 seldepth 15 multipv 1 score mate -7 nodes 160816 nps 91062 hashfull 42 tbhits 0 time 1766 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c2 d4d5 c2c5 d5e6 c5d6
info depth 23 seldepth 15 multipv 1 score mate -7 nodes 183462 nps 91731 hashfull 47 tbhits 0 time 2000 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c2 d4d5 c2c5 d5e6 c5d6
info depth 24 seldepth 15 multipv 1 score mate -7 nodes 226094 nps 92966 hashfull 59 tbhits 0 time 2432 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c2 d4d5 c2c5 d5e6 c5d6
info depth 25 seldepth 15 multipv 1 score mate -7 nodes 281312 nps 93770 hashfull 73 tbhits 0 time 3000 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c2 d4d5 c2c5 d5e6 c5d6
info depth 26 currmove c5d5 currmovenumber 2
info depth 26 currmove c5b4 currmovenumber 3
info depth 26 currmove c5b5 currmovenumber 4
info depth 26 currmove c5b6 currmovenumber 5
info depth 26 seldepth 15 multipv 1 score mate -7 nodes 349550 nps 93738 hashfull 92 tbhits 0 time 3729 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c2 d4d5 c2c5 d5e6 c5d6
info depth 27 currmove c5d6 currmovenumber 1
info depth 27 currmove c5d5 currmovenumber 2
info depth 27 currmove c5b4 currmovenumber 3
info depth 27 currmove c5b6 currmovenumber 4
info depth 27 currmove c5b5 currmovenumber 5
info depth 27 seldepth 15 multipv 1 score mate -7 nodes 437921 nps 93793 hashfull 122 tbhits 0 time 4669 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c2 d4d5 c2c5 d5e6 c5d6
info depth 28 currmove c5d6 currmovenumber 1
info depth 28 currmove c5b4 currmovenumber 2
info depth 28 currmove c5d5 currmovenumber 3
info depth 28 currmove c5b6 currmovenumber 4
info depth 28 currmove c5b5 currmovenumber 5
info depth 28 seldepth 15 multipv 1 score mate -7 nodes 562973 nps 93781 hashfull 160 tbhits 0 time 6003 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c2 d4d5 c2c5 d5e6 c5d6
info depth 29 currmove c5d6 currmovenumber 1
info depth 29 currmove c5b4 currmovenumber 2
info depth 29 currmove c5d5 currmovenumber 3
info depth 29 currmove c5b6 currmovenumber 4
info depth 29 currmove c5b5 currmovenumber 5
info depth 29 seldepth 15 multipv 1 score mate -7 nodes 729986 nps 92861 hashfull 207 tbhits 0 time 7861 pv c5d6 e2d4 d6d5 c1c7 d5d4 g4f6 d4d3 f6e4 d3d4 c7c2 d4d5 c2c5 d5e6 c5d6
info depth 30 currmove c5d6 currmovenumber 1
info depth 30 currmove c5b4 currmovenumber 2
info depth 30 currmove c5d5 currmovenumber 3
info depth 30 currmove c5b6 currmovenumber 4
bestmove c5d6 ponder e2d4