Dev Builds » 20260903-0457

Use this dev build

NCM plays each Stockfish dev build 20,000 times against Stockfish 15. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

Host	Duration	Avg Base NPS	Games	WLD	Standard Elo	Ptnml(0-2)	Gamepair Elo
ncm-dbt-01	06:46:15	583361	4000	1831 291 1878	+141.03 ± 4.43	0 15 483 1449 53	+332.93 ± 15.47
ncm-dbt-02	06:45:10	590271	4000	1831 284 1885	+141.74 ± 4.45	0 18 471 1457 54	+335.28 ± 15.68
ncm-dbt-03	06:46:23	583187	4000	1822 305 1873	+138.69 ± 4.36	0 16 492 1451 41	+328.7 ± 15.33
ncm-dbt-04	06:44:55	566967	4000	1811 274 1915	+140.72 ± 4.36	0 19 466 1474 41	+336.46 ± 15.77
ncm-dbt-05	06:47:53	607407	4000	1819 283 1898	+140.62 ± 4.47	0 14 494 1434 58	+329.46 ± 15.28
			20000	9114 1437 9449	+140.56 ± 1.97	0 82 2406 7265 247	+332.55 ± 6.92

Test Detail

ID	Host	Base NPS	Games	WLD	Standard Elo	Ptnml(0-2)	Gamepair Elo	PGN
484470	ncm-dbt-02	588387	500	219 36 245	+133.34 ± 12.69	0 3 66 176 5	+309.64 ± 42.33	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3504841884 \ -pgnout ncm-dbt-20260903-0457-040.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484469	ncm-dbt-04	566651	500	231 37 232	+142.25 ± 12.16	0 3 54 189 4	+346.12 ± 47.1	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2514239 \ -pgnout ncm-dbt-20260903-0457-039.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484468	ncm-dbt-05	604577	500	223 39 238	+134.15 ± 12.27	0 1 69 175 5	+312.48 ± 41.11	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3807272622 \ -pgnout ncm-dbt-20260903-0457-038.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484467	ncm-dbt-01	582152	500	229 36 235	+141.44 ± 11.98	0 1 60 184 5	+339.63 ± 44.35	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2445055144 \ -pgnout ncm-dbt-20260903-0457-037.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484466	ncm-dbt-03	581485	500	215 42 243	+125.38 ± 12.32	0 3 73 172 2	+290.66 ± 40.08	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4054684487 \ -pgnout ncm-dbt-20260903-0457-036.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484465	ncm-dbt-02	591082	500	237 47 216	+138.99 ± 12.7	0 1 66 175 8	+321.19 ± 42.12	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 365409035 \ -pgnout ncm-dbt-20260903-0457-035.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484464	ncm-dbt-05	601402	500	225 31 244	+142.25 ± 12.16	0 2 57 186 5	+342.85 ± 45.71	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2571282725 \ -pgnout ncm-dbt-20260903-0457-034.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484463	ncm-dbt-04	567561	500	231 31 238	+147.19 ± 12.78	0 2 55 184 9	+349.43 ± 46.59	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2666466209 \ -pgnout ncm-dbt-20260903-0457-033.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484462	ncm-dbt-01	582277	500	231 40 229	+139.81 ± 12.87	0 2 63 177 8	+324.17 ± 43.32	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1179537431 \ -pgnout ncm-dbt-20260903-0457-032.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484461	ncm-dbt-03	583782	500	232 43 225	+138.18 ± 12.53	0 2 63 179 6	+324.17 ± 43.32	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2670413225 \ -pgnout ncm-dbt-20260903-0457-031.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484460	ncm-dbt-02	590053	500	229 41 230	+137.37 ± 11.29	0 0 64 184 2	+333.32 ± 42.66	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2313823329 \ -pgnout ncm-dbt-20260903-0457-030.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484459	ncm-dbt-04	566651	500	215 33 252	+132.54 ± 12.52	0 5 60 183 2	+315.35 ± 44.57	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2378397901 \ -pgnout ncm-dbt-20260903-0457-029.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484458	ncm-dbt-05	607514	500	235 36 229	+146.36 ± 12.81	0 2 56 183 9	+346.12 ± 46.15	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2316690108 \ -pgnout ncm-dbt-20260903-0457-028.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484457	ncm-dbt-01	583572	500	217 42 241	+126.97 ± 12.47	0 3 72 172 3	+293.29 ± 40.39	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2292209259 \ -pgnout ncm-dbt-20260903-0457-027.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484456	ncm-dbt-03	583656	500	226 40 234	+135.76 ± 11.8	0 1 65 181 3	+324.17 ± 42.47	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 860778175 \ -pgnout ncm-dbt-20260903-0457-026.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484413	ncm-dbt-01	580821	500	231 34 235	+144.71 ± 12.68	0 1 60 180 9	+339.63 ± 44.35	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 854912459 \ -pgnout ncm-dbt-20260903-0457-025.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484412	ncm-dbt-03	582402	500	233 36 231	+144.71 ± 11.83	0 0 59 185 6	+349.43 ± 44.59	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 61630740 \ -pgnout ncm-dbt-20260903-0457-024.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484411	ncm-dbt-02	591814	500	220 26 254	+142.25 ± 12.58	0 3 56 185 6	+339.63 ± 46.2	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1665718842 \ -pgnout ncm-dbt-20260903-0457-023.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484410	ncm-dbt-05	599141	500	220 35 245	+134.95 ± 12.64	0 3 64 178 5	+315.35 ± 43.03	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2450258503 \ -pgnout ncm-dbt-20260903-0457-022.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484409	ncm-dbt-04	568037	500	231 26 243	+151.34 ± 11.91	0 2 47 195 6	+377.87 ± 50.67	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1297460463 \ -pgnout ncm-dbt-20260903-0457-021.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484408	ncm-dbt-01	583656	500	232 31 237	+148.01 ± 11.88	0 0 56 187 7	+359.67 ± 45.87	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1971994532 \ -pgnout ncm-dbt-20260903-0457-020.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484407	ncm-dbt-03	582819	500	234 29 237	+151.34 ± 11.91	0 2 47 195 6	+377.87 ± 50.67	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1869089878 \ -pgnout ncm-dbt-20260903-0457-019.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484406	ncm-dbt-05	606788	500	232 41 227	+139.81 ± 13.26	0 1 68 170 11	+315.35 ± 41.44	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 604223913 \ -pgnout ncm-dbt-20260903-0457-018.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484405	ncm-dbt-02	593066	500	235 29 236	+152.18 ± 12.95	0 2 51 186 11	+363.2 ± 48.51	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4109064526 \ -pgnout ncm-dbt-20260903-0457-017.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484404	ncm-dbt-04	566572	500	231 32 237	+146.36 ± 12.4	0 2 54 187 7	+352.8 ± 47.05	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3593027179 \ -pgnout ncm-dbt-20260903-0457-016.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484403	ncm-dbt-01	584201	500	226 42 232	+134.15 ± 12.47	0 3 64 179 4	+315.35 ± 43.03	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2357757313 \ -pgnout ncm-dbt-20260903-0457-015.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484402	ncm-dbt-03	584453	500	231 46 223	+134.95 ± 13.41	0 3 68 170 9	+304.07 ± 41.65	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3245055132 \ -pgnout ncm-dbt-20260903-0457-014.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484401	ncm-dbt-05	608468	500	230 38 232	+140.62 ± 12.64	0 1 64 177 8	+327.18 ± 42.83	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3828727235 \ -pgnout ncm-dbt-20260903-0457-013.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484400	ncm-dbt-02	589625	500	229 28 243	+148.02 ± 12.32	0 3 49 192 6	+363.2 ± 49.57	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2527516739 \ -pgnout ncm-dbt-20260903-0457-012.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484399	ncm-dbt-04	567047	500	229 40 231	+138.18 ± 11.7	0 1 62 184 3	+333.32 ± 43.57	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2065518052 \ -pgnout ncm-dbt-20260903-0457-011.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484398	ncm-dbt-03	585042	500	231 23 246	+153.86 ± 11.53	0 1 46 197 6	+389.56 ± 51.18	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4016382629 \ -pgnout ncm-dbt-20260903-0457-010.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484397	ncm-dbt-01	584076	500	230 42 228	+137.37 ± 12.96	0 2 66 174 8	+315.35 ± 42.24	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3865186613 \ -pgnout ncm-dbt-20260903-0457-009.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484396	ncm-dbt-04	566730	500	227 42 231	+134.95 ± 12.64	0 2 67 175 6	+312.48 ± 41.9	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 883840553 \ -pgnout ncm-dbt-20260903-0457-008.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484395	ncm-dbt-02	590181	500	232 39 229	+141.44 ± 13.21	0 4 57 181 8	+330.23 ± 45.79	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1346469652 \ -pgnout ncm-dbt-20260903-0457-007.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484394	ncm-dbt-05	607922	500	226 35 239	+139.81 ± 12.47	0 2 61 181 6	+330.23 ± 44.08	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3721474088 \ -pgnout ncm-dbt-20260903-0457-006.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484393	ncm-dbt-03	581860	500	220 46 234	+126.17 ± 12.68	0 4 71 172 3	+290.66 ± 40.76	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 317942281 \ -pgnout ncm-dbt-20260903-0457-005.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484392	ncm-dbt-02	587962	500	230 38 232	+140.62 ± 12.84	0 2 62 178 8	+327.18 ± 43.69	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3795957128 \ -pgnout ncm-dbt-20260903-0457-004.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484391	ncm-dbt-04	566493	500	216 33 251	+133.34 ± 12.29	0 2 67 177 4	+312.48 ± 41.9	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3085962890 \ -pgnout ncm-dbt-20260903-0457-003.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484390	ncm-dbt-01	586139	500	235 24 241	+156.39 ± 12.51	0 3 42 196 9	+389.56 ± 53.75	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1496505770 \ -pgnout ncm-dbt-20260903-0457-002.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484389	ncm-dbt-05	623447	500	228 28 244	+147.19 ± 12.78	0 2 55 184 9	+349.43 ± 46.59	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2269368352 \ -pgnout ncm-dbt-20260903-0457-001.pgn \ -openings \ file=UHO_4060_v2.epd \ format=epd \ order=random \ -repeat \ -resign \ movecount=3 \ score=600 \ -draw \ movenumber=34 \ movecount=8 \ score=5 \ -each \ tc=30+0.3 \ timemargin=10000 \ proto=uci \ option.Hash=128 \ option.Threads=8 \ -engine \ name=20260903-0457 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:01d71fc9a735a13d84402ac9bee8d54b6b5669cd \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15

Commit

Commit ID	01d71fc9a735a13d84402ac9bee8d54b6b5669cd
Author	IncognitoQuack
Date	2026-09-03 04:57:54 UTC
Fix UB when passing plain char to <cctype> functions Cast to `unsigned char` before calling these functions, matching the pattern already used elsewhere in the codebase (`UCIEngine::to_lower`, `CaseInsensitiveLess::operator()`). closes https://github.com/official-stockfish/Stockfish/pull/7126 No functional change Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>