Dev Builds » 20260901-1504

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	06:36:05	583423	3926	1805 274 1847	+143.06 ± 4.49	0 18 450 1441 54	+339.97 ± 16.06
ncm-dbt-02	06:35:34	591832	3914	1764 272 1878	+139.48 ± 4.52	0 15 489 1399 54	+326.27 ± 15.37
ncm-dbt-03	06:36:13	583413	3900	1758 282 1860	+138.37 ± 4.4	0 15 483 1413 39	+327.88 ± 15.46
ncm-dbt-04	07:26:28	568000	4394	1982 308 2104	+139.39 ± 4.14	0 19 528 1607 43	+332.06 ± 14.8
ncm-dbt-05	06:35:50	605825	3866	1752 278 1836	+139.51 ± 4.57	0 29 443 1419 42	+330.86 ± 16.21
			20000	9061 1414 9525	+139.95 ± 1.98	0 96 2393 7279 232	+331.39 ± 6.95

Test Detail

ID	Host	Base NPS	Games	WLD	Standard Elo	Ptnml(0-2)	Gamepair Elo	PGN
484215	ncm-dbt-05	602739	366	161 33 172	+126.86 ± 16.23	0 5 50 123 5	+283.03 ± 48.9	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1615361290 \ -pgnout ncm-dbt-20260901-1504-041.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484214	ncm-dbt-03	585042	400	175 29 196	+132.94 ± 15.41	0 4 53 136 7	+297.95 ± 47.47	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3524239901 \ -pgnout ncm-dbt-20260901-1504-040.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484213	ncm-dbt-04	566336	394	169 32 193	+126.06 ± 14.69	0 1 64 126 6	+278.53 ± 42.47	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3429793543 \ -pgnout ncm-dbt-20260901-1504-039.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484212	ncm-dbt-02	593326	414	188 24 202	+145.59 ± 14.88	0 3 46 149 9	+337.08 ± 51.17	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1483510454 \ -pgnout ncm-dbt-20260901-1504-038.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484211	ncm-dbt-01	582152	426	194 36 196	+135.31 ± 13.73	0 4 50 156 3	+320.97 ± 48.98	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2654454151 \ -pgnout ncm-dbt-20260901-1504-037.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484210	ncm-dbt-05	601624	500	231 32 237	+146.36 ± 12.81	0 4 50 189 7	+352.8 ± 49.02	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2811403954 \ -pgnout ncm-dbt-20260901-1504-036.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484209	ncm-dbt-04	567007	500	228 37 235	+139.81 ± 12.47	0 2 61 181 6	+330.23 ± 44.08	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2832963667 \ -pgnout ncm-dbt-20260901-1504-035.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484208	ncm-dbt-03	584117	500	218 30 252	+137.37 ± 11.73	0 3 57 189 1	+336.46 ± 45.77	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3162957974 \ -pgnout ncm-dbt-20260901-1504-034.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484207	ncm-dbt-02	590911	500	220 40 240	+130.94 ± 12.76	0 3 69 173 5	+301.33 ± 41.33	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 861607244 \ -pgnout ncm-dbt-20260901-1504-033.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484206	ncm-dbt-01	581236	500	226 37 237	+138.18 ± 12.53	0 4 57 185 4	+330.23 ± 45.79	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 736978932 \ -pgnout ncm-dbt-20260901-1504-032.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484205	ncm-dbt-05	623877	500	227 28 245	+146.36 ± 11.96	0 3 49 194 4	+363.2 ± 49.57	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 721016910 \ -pgnout ncm-dbt-20260901-1504-031.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484204	ncm-dbt-04	563744	500	227 20 253	+153.02 ± 11.35	0 1 46 198 5	+389.56 ± 51.18	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3736307662 \ -pgnout ncm-dbt-20260901-1504-030.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484203	ncm-dbt-02	593629	500	222 34 244	+137.37 ± 12.36	0 2 63 180 5	+324.17 ± 43.32	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4202045702 \ -pgnout ncm-dbt-20260901-1504-029.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484202	ncm-dbt-03	583740	500	223 38 239	+134.95 ± 12.84	0 2 68 173 7	+309.64 ± 41.56	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3864965564 \ -pgnout ncm-dbt-20260901-1504-028.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484201	ncm-dbt-01	583950	500	225 40 235	+134.95 ± 13.22	0 2 70 169 9	+304.07 ± 40.91	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2390272083 \ -pgnout ncm-dbt-20260901-1504-027.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484200	ncm-dbt-05	604262	500	228 36 236	+140.62 ± 13.04	0 5 54 185 6	+333.32 ± 47.06	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4059931942 \ -pgnout ncm-dbt-20260901-1504-026.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484199	ncm-dbt-04	570348	500	233 42 225	+139.81 ± 12.67	0 3 59 182 6	+330.23 ± 44.94	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4004907562 \ -pgnout ncm-dbt-20260901-1504-025.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484198	ncm-dbt-03	581070	500	217 39 244	+129.35 ± 12.41	0 3 69 175 3	+301.33 ± 41.33	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3884684796 \ -pgnout ncm-dbt-20260901-1504-024.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484197	ncm-dbt-02	590653	500	227 38 235	+138.18 ± 12.93	0 2 65 175 8	+318.25 ± 42.59	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1201136087 \ -pgnout ncm-dbt-20260901-1504-023.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484196	ncm-dbt-01	585674	500	237 32 231	+151.34 ± 13.2	0 2 53 183 12	+356.21 ± 47.52	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2698223806 \ -pgnout ncm-dbt-20260901-1504-022.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484195	ncm-dbt-05	601802	500	234 36 230	+145.54 ± 12.64	0 0 62 178 10	+339.63 ± 43.41	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 356201456 \ -pgnout ncm-dbt-20260901-1504-021.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484194	ncm-dbt-04	567482	500	233 30 237	+149.68 ± 12.01	0 1 52 190 7	+366.78 ± 47.92	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1119585600 \ -pgnout ncm-dbt-20260901-1504-020.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484193	ncm-dbt-03	583614	500	231 40 229	+139.8 ± 11.84	0 0 64 181 5	+333.32 ± 42.66	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1319038094 \ -pgnout ncm-dbt-20260901-1504-019.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484192	ncm-dbt-02	592677	500	228 23 249	+151.34 ± 12.14	0 1 51 190 8	+370.41 ± 48.42	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4168130077 \ -pgnout ncm-dbt-20260901-1504-018.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484191	ncm-dbt-01	584495	500	241 35 224	+152.18 ± 11.87	0 1 49 193 7	+377.87 ± 49.47	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1781011191 \ -pgnout ncm-dbt-20260901-1504-017.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484190	ncm-dbt-05	604352	500	228 43 229	+134.95 ± 12.84	0 5 59 182 4	+318.25 ± 44.96	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1728441885 \ -pgnout ncm-dbt-20260901-1504-016.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484189	ncm-dbt-04	568991	500	223 25 252	+145.54 ± 11.33	0 1 53 193 3	+363.2 ± 47.43	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2895975264 \ -pgnout ncm-dbt-20260901-1504-015.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484188	ncm-dbt-03	582903	500	230 31 239	+146.36 ± 12.18	0 0 59 183 8	+349.43 ± 44.59	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3211093733 \ -pgnout ncm-dbt-20260901-1504-014.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484187	ncm-dbt-02	590653	500	230 38 232	+140.62 ± 12.44	0 2 60 182 6	+333.32 ± 44.47	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 94741674 \ -pgnout ncm-dbt-20260901-1504-013.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484186	ncm-dbt-01	583656	500	222 28 250	+142.25 ± 12.37	0 1 61 181 7	+336.46 ± 43.96	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1220692238 \ -pgnout ncm-dbt-20260901-1504-012.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484185	ncm-dbt-05	602382	500	222 35 243	+136.56 ± 12.18	0 4 57 187 2	+330.23 ± 45.79	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1899498509 \ -pgnout ncm-dbt-20260901-1504-011.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484184	ncm-dbt-03	581402	500	234 41 225	+141.44 ± 11.98	0 2 57 187 4	+342.85 ± 45.71	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3584035957 \ -pgnout ncm-dbt-20260901-1504-010.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484183	ncm-dbt-01	584117	500	234 26 240	+153.86 ± 11.53	0 1 46 197 6	+389.56 ± 51.18	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3401120158 \ -pgnout ncm-dbt-20260901-1504-009.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484182	ncm-dbt-04	567324	500	227 35 238	+140.62 ± 12.23	0 3 56 187 4	+339.63 ± 46.2	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2000244420 \ -pgnout ncm-dbt-20260901-1504-008.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484181	ncm-dbt-02	590868	500	218 38 244	+130.94 ± 12.76	0 1 75 167 7	+295.94 ± 39.27	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1251581860 \ -pgnout ncm-dbt-20260901-1504-007.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484180	ncm-dbt-02	591943	500	231 37 232	+142.25 ± 12.16	0 1 60 183 6	+339.63 ± 44.35	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3038258127 \ -pgnout ncm-dbt-20260901-1504-006.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484179	ncm-dbt-04	567126	500	219 44 237	+126.97 ± 12.28	0 2 74 171 3	+293.29 ± 39.69	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2272092180 \ -pgnout ncm-dbt-20260901-1504-005.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484178	ncm-dbt-05	605568	500	221 35 244	+135.76 ± 12.42	0 3 62 181 4	+321.19 ± 43.77	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 619664465 \ -pgnout ncm-dbt-20260901-1504-004.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484177	ncm-dbt-01	582110	500	226 40 234	+135.76 ± 12.81	0 3 64 177 6	+315.35 ± 43.03	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 678614563 \ -pgnout ncm-dbt-20260901-1504-003.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484176	ncm-dbt-03	585421	500	230 34 236	+143.89 ± 11.65	0 1 56 189 4	+352.8 ± 46.04	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2399660044 \ -pgnout ncm-dbt-20260901-1504-002.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
484131	ncm-dbt-04	573649	500	223 43 234	+130.94 ± 12.76	0 5 63 179 3	+306.84 ± 43.45	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1014291857 \ -pgnout ncm-dbt-20260901-1504-001.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=20260901-1504 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15

Commit

Commit ID	3f6f417b87c0e80ee30914b6b539b4ab7d3b2a5b
Author	Robert Nurnberg @ elitebook
Date	2026-09-01 15:04:52 UTC
Update the WDL model This PR updates the internal WDL model, using data from 2M games played by the revisions since 229f6339e537a097a79831cd06dbfdb3e623d4ac. The normalizing constant decreases significantly from 385 to 304. That means the current 78cp will roughly map to 100cp. ``` > ./updateWDL.sh --firstrev 229f6339e537a097a79831cd06dbfdb3e623d4ac Running: ./updateWDL.sh --firstrev 229f6339e537a097a79831cd06dbfdb3e623d4ac --lasttrev HEAD --materialMin 17 --EloDiffMax 5 started at: Tue 1 Sep 14:31:12 CEST 2026 Look recursively in directory pgns for games with max nElo difference 5 using books matching "UHO_Lichess_4852_v..epd" for SF revisions between 229f6339e537a097a79831cd06dbfdb3e623d4ac (from 2026-08-19 18:48:49 +0200) and HEAD (from 2026-08-29 09:16:46 +0200). Based on 109147283 positions from 2046412 games, NormalizeToPawnValue should change from 385 to 304. In the updated WDL model, 78cp would roughly map to 100cp. ended at: Tue 1 Sep 14:32:20 CEST 2026 ``` ``` > cat scoreWDL.log Converting evals with NormalizeData = {'momType': 'material', 'momMin': 17, 'momMax': 78, 'momTarget': 58, 'as': [-72.32565836, 185.93832038, -144.58862193, 416.44950446]}. Reading eval stats from updateWDL.json. Retained (W,D,L) = (26673519, 54948054, 27525710) positions. Saved distribution plot to updateWDLdistro.png. Fit WDL model based on material. Initial objective function: 0.3550415621263458 Final objective function: 0.3550400701834142 Optimization terminated successfully. const int NormalizeToPawnValue = 304; Corresponding spread = 61; Corresponding normalized spread = 0.19927805405945914; Draw rate at 0.0 eval at material 58 = 0.986853004859315; Parameters in internal value units: p_a = ((-142.721 * x / 58 + 372.352) * x / 58 + -340.711) * x / 58 + 415.235 p_b = ((5.938 * x / 58 + 15.613) * x / 58 + -30.578) * x / 58 + 69.639 constexpr double as[] = {-142.72052667, 372.35176398, -340.71073572, 415.23490212}; constexpr double bs[] = {5.93832785, 15.61267078, -30.57816876, 69.63866711}; Preparing plots. Saved graphics to updateWDL.png. Total elapsed time = 30.92s. ``` The patch only affects the displayed `cp` and `wdl` values, and nothing else. closes https://github.com/official-stockfish/Stockfish/pull/7120 No functional change