Dev Builds » 20260710-1819

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	06:46:14	583475	4000	1768 335 1897	+130.25 ± 4.52	0 31 539 1396 34	+300.99 ± 14.66
ncm-dbt-02	06:46:31	598302	4002	1801 350 1851	+131.97 ± 4.49	0 25 538 1400 38	+305.55 ± 14.66
ncm-dbt-03	06:45:23	583252	4000	1803 343 1854	+132.94 ± 4.51	2 22 529 1408 39	+309.29 ± 14.79
ncm-dbt-04	06:46:16	566920	3998	1803 322 1873	+135.13 ± 4.4	0 21 512 1430 36	+317.42 ± 15.03
ncm-dbt-05	06:46:40	581784	4000	1777 323 1900	+132.34 ± 4.45	1 24 527 1416 32	+309.29 ± 14.82
			20000	8952 1673 9375	+132.52 ± 2.0	3 123 2645 7050 179	+308.45 ± 6.61

Test Detail

ID	Host	Base NPS	Games	WLD	Standard Elo	Ptnml(0-2)	Gamepair Elo	PGN
478206	ncm-dbt-02	592720	2	1 0 1	+189.7 ± 55.98	0 0 0 1 0	+1129.65 ± 376.02	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3105918875 \ -pgnout ncm-dbt-20260710-1819-041.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478205	ncm-dbt-04	567403	498	227 44 227	+133.93 ± 13.09	0 3 67 172 7	+306.03 ± 41.98	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2476450523 \ -pgnout ncm-dbt-20260710-1819-040.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478204	ncm-dbt-05	584622	500	222 47 231	+126.97 ± 12.66	0 2 76 167 5	+288.06 ± 39.11	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1420506829 \ -pgnout ncm-dbt-20260710-1819-039.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478203	ncm-dbt-01	584579	500	219 42 239	+128.55 ± 13.56	0 6 67 171 6	+290.66 ± 42.08	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2006154760 \ -pgnout ncm-dbt-20260710-1819-038.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478202	ncm-dbt-03	584495	500	223 44 233	+130.15 ± 13.16	1 2 69 173 5	+301.33 ± 41.33	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2215741843 \ -pgnout ncm-dbt-20260710-1819-037.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478201	ncm-dbt-02	655783	500	219 49 232	+123.02 ± 12.74	0 4 75 168 3	+280.42 ± 39.57	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 722288727 \ -pgnout ncm-dbt-20260710-1819-036.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478200	ncm-dbt-04	567997	500	231 49 220	+132.54 ± 12.91	0 7 56 185 2	+315.35 ± 46.07	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 308377618 \ -pgnout ncm-dbt-20260710-1819-035.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478199	ncm-dbt-01	581527	500	219 38 243	+131.74 ± 13.49	0 5 66 172 7	+298.62 ± 42.41	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 191650123 \ -pgnout ncm-dbt-20260710-1819-034.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478198	ncm-dbt-05	578959	500	218 39 243	+130.14 ± 12.97	0 5 65 176 4	+301.33 ± 42.75	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3835278199 \ -pgnout ncm-dbt-20260710-1819-033.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478197	ncm-dbt-03	582402	500	221 38 241	+133.34 ± 12.69	0 3 66 176 5	+309.64 ± 42.33	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1838438724 \ -pgnout ncm-dbt-20260710-1819-032.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478196	ncm-dbt-02	589796	500	227 40 233	+136.56 ± 13.73	0 2 71 165 12	+301.33 ± 40.6	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2515488032 \ -pgnout ncm-dbt-20260710-1819-031.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478195	ncm-dbt-04	565430	500	223 41 236	+132.54 ± 11.91	0 0 72 174 4	+309.64 ± 40.0	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 19033003 \ -pgnout ncm-dbt-20260710-1819-030.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478194	ncm-dbt-05	579992	500	235 39 226	+143.89 ± 12.09	0 3 52 191 4	+352.8 ± 48.05	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1011431682 \ -pgnout ncm-dbt-20260710-1819-029.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478193	ncm-dbt-01	585632	500	229 42 229	+136.56 ± 12.59	0 2 65 177 6	+318.25 ± 42.59	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 713208375 \ -pgnout ncm-dbt-20260710-1819-028.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478192	ncm-dbt-03	583489	500	215 46 239	+122.24 ± 13.3	1 4 73 169 3	+280.42 ± 40.21	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2743313710 \ -pgnout ncm-dbt-20260710-1819-027.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478191	ncm-dbt-02	590524	500	226 47 227	+130.14 ± 12.39	0 3 68 176 3	+304.07 ± 41.65	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1259448676 \ -pgnout ncm-dbt-20260710-1819-026.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478190	ncm-dbt-05	582235	500	219 51 230	+121.45 ± 13.14	0 6 73 168 3	+275.45 ± 40.24	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3497706525 \ -pgnout ncm-dbt-20260710-1819-025.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478189	ncm-dbt-04	567839	500	229 38 233	+139.81 ± 13.07	0 1 67 172 10	+318.25 ± 41.77	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3047460387 \ -pgnout ncm-dbt-20260710-1819-024.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478188	ncm-dbt-01	583196	500	225 48 227	+128.55 ± 12.24	0 2 72 173 3	+298.62 ± 40.29	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4151767993 \ -pgnout ncm-dbt-20260710-1819-023.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478187	ncm-dbt-03	583405	500	228 38 234	+138.99 ± 12.3	0 2 61 182 5	+330.23 ± 44.08	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3844411123 \ -pgnout ncm-dbt-20260710-1819-022.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478186	ncm-dbt-02	592590	500	233 47 220	+135.76 ± 13.2	0 5 60 179 6	+315.35 ± 44.57	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1562918201 \ -pgnout ncm-dbt-20260710-1819-021.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478185	ncm-dbt-05	580075	500	228 37 235	+139.81 ± 11.84	0 2 58 187 3	+339.63 ± 45.29	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3051696787 \ -pgnout ncm-dbt-20260710-1819-020.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478184	ncm-dbt-04	566730	500	224 32 244	+140.62 ± 11.59	0 1 59 187 3	+342.85 ± 44.76	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3325941518 \ -pgnout ncm-dbt-20260710-1819-019.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478183	ncm-dbt-02	591857	500	225 32 243	+141.44 ± 11.77	0 2 56 189 3	+346.12 ± 46.15	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 4294464368 \ -pgnout ncm-dbt-20260710-1819-018.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478182	ncm-dbt-01	583154	500	210 40 250	+123.02 ± 12.37	0 4 73 172 1	+285.49 ± 40.16	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3001056528 \ -pgnout ncm-dbt-20260710-1819-017.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478181	ncm-dbt-03	583531	500	232 41 227	+139.81 ± 13.64	0 7 52 184 7	+327.18 ± 47.79	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 23280043 \ -pgnout ncm-dbt-20260710-1819-016.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478180	ncm-dbt-05	581652	500	216 42 242	+126.18 ± 13.24	1 2 74 168 5	+288.06 ± 39.79	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2004530472 \ -pgnout ncm-dbt-20260710-1819-015.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478179	ncm-dbt-02	588984	500	225 44 231	+131.74 ± 12.54	0 5 61 182 2	+312.48 ± 44.19	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 94038804 \ -pgnout ncm-dbt-20260710-1819-014.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478178	ncm-dbt-04	567680	500	226 37 237	+138.18 ± 12.33	0 2 62 181 5	+327.18 ± 43.69	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 856760490 \ -pgnout ncm-dbt-20260710-1819-013.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478177	ncm-dbt-01	583154	500	224 39 237	+134.95 ± 12.84	0 7 53 188 2	+324.17 ± 47.35	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1673948067 \ -pgnout ncm-dbt-20260710-1819-012.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478176	ncm-dbt-03	584579	500	225 38 237	+136.56 ± 12.18	0 2 63 181 4	+324.17 ± 43.32	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2873199098 \ -pgnout ncm-dbt-20260710-1819-011.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478175	ncm-dbt-05	581236	500	218 36 246	+132.54 ± 12.12	0 1 70 175 4	+309.64 ± 40.79	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1977737493 \ -pgnout ncm-dbt-20260710-1819-010.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478174	ncm-dbt-02	590567	500	217 48 235	+122.24 ± 12.38	0 1 83 162 4	+275.45 ± 37.11	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3196778129 \ -pgnout ncm-dbt-20260710-1819-009.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478173	ncm-dbt-01	582360	500	215 45 240	+123.02 ± 12.56	0 3 77 167 3	+280.42 ± 38.93	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 3649214192 \ -pgnout ncm-dbt-20260710-1819-008.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478172	ncm-dbt-03	584874	500	228 50 222	+129.35 ± 12.41	0 2 72 172 4	+298.62 ± 40.29	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2133242717 \ -pgnout ncm-dbt-20260710-1819-007.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478171	ncm-dbt-04	564762	500	230 42 228	+137.37 ± 12.56	0 3 61 181 5	+324.17 ± 44.15	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1524944884 \ -pgnout ncm-dbt-20260710-1819-006.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478170	ncm-dbt-04	567522	500	213 39 248	+126.18 ± 12.1	0 4 68 178 0	+298.62 ± 41.71	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 660124033 \ -pgnout ncm-dbt-20260710-1819-005.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478169	ncm-dbt-01	584201	500	227 41 232	+135.76 ± 12.62	0 2 66 176 6	+315.35 ± 42.24	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 347702713 \ -pgnout ncm-dbt-20260710-1819-004.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478168	ncm-dbt-05	585506	500	221 32 247	+138.18 ± 12.33	0 3 59 184 4	+330.23 ± 44.94	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 1773709426 \ -pgnout ncm-dbt-20260710-1819-003.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478167	ncm-dbt-03	579248	500	231 48 221	+133.34 ± 12.29	0 0 73 171 6	+306.84 ± 39.69	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 2679345142 \ -pgnout ncm-dbt-20260710-1819-002.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15
478166	ncm-dbt-02	591900	500	228 43 229	+134.95 ± 12.64	0 3 64 178 5	+315.35 ± 43.03	↓
cutechess-cli \ -rounds 266 \ -games 2 \ -concurrency 16 \ -srand 782777135 \ -pgnout ncm-dbt-20260710-1819-001.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=20260710-1819 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=dev_build:9d4090e82685cca447265dcd7093d617cb34a107 \ -engine \ name=sf15 \ cmd=docker \ arg=run \ arg=-i \ arg=--rm \ arg=--entrypoint=/engine \ arg=stockfish:15

Commit

Commit ID	9d4090e82685cca447265dcd7093d617cb34a107
Author	ayushthepiro11
Date	2026-07-10 18:19:02 UTC
Scale Null Move Pruning reduction dynamically based on evaluation margin This patch introduces a dynamic scaling factor for Null Move Pruning (NMP) reductions. By scaling the reduction depth relative to the static evaluation margin against beta, the engine can afford more aggressive reductions in positions that are overwhelmingly favorable, optimizing CPU cycle utilization without compromising search integrity. Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 85504 W: 22383 L: 22000 D: 41121 Ptnml(0-2): 225, 9855, 22218, 10220, 234 https://tests.stockfishchess.org/tests/view/6a4793daf97ff95f78795812 Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 205800 W: 53879 L: 53224 D: 98697 Ptnml(0-2): 98, 21747, 58561, 22390, 104 https://tests.stockfishchess.org/tests/view/6a4b864ff97ff95f78795e52 closes https://github.com/official-stockfish/Stockfish/pull/6963 Bench: 2513153