Stackruns

Run T-0012 passed

· Evidence: SPRT Sequential probability ratio test. Games are played until the accumulated evidence reaches one of two bounds; then the test stops.

Hypothesis

Ranking captures that a static exchange evaluation shows to lose material behind every quiet move, instead of ahead of them as MVV-LVA alone does, should raise the alpha-beta cut-off rate and make each search depth cheaper.

Stages

Elo against the predecessorElo intervals: short stage +476.43 ± 57.99; long stage +610.64 ± 66.39.0+100+200+300+400+500+600+700short stage+476.43 ± 57.99short stage · passed+476.43 ± 57.99 Elo · 314 gameslong stage+610.64 ± 66.39long stage · passed+610.64 ± 66.39 Elo · 502 games
Point estimate with the reported 95-percent half-width, per stage. The dashed line is zero. Estimates from a stopped sequential test are biased by the stopping rule; the interval is nominal.
Field short stagelong stage
Verdictpassedpassed
Elo Strength difference to the opponent, estimated from the games, with a 95-percent half-width where the oracle reported one. Never an absolute rating.+476.43 ± 57.99+610.64 ± 66.39
nElo Normalised Elo: the Elo difference divided by the spread of the game results, so that the SPRT bounds mean the same at different time controls.+917.30 ± 38.43+1,394.89 ± 30.39
Games314502
Wins / draws / losses277 / 36 / 1474 / 27 / 1
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.0 / 1 / 0 / 35 / 1210 / 0 / 1 / 27 / 223
LLR Log-likelihood ratio, the running evidence of an SPRT. It starts at 0; a stage passes at the upper bound (about +2.94) and fails at the lower one (about −2.94).+2.96+2.96
Bounds−2.94 … +2.94−2.94 … +2.94
SPRT Sequential probability ratio test. Games are played until the accumulated evidence reaches one of two bounds; then the test stops.[0.0, 5.0][0.0, 3.0]
Error rates α / β0.05 / 0.050.05 / 0.05
Modelnormalizednormalized
time control Base time plus increment per move in seconds, e.g. 8+0.08: eight seconds per game plus 0.08 seconds per move.8+0.0840+0.4
BookAB
Opponent––
Duration––

Provenance

Date
2026-08-29
Author
Agent A
Bench nodes
10,220
Commit
b65d0895ed6cfcd6bb44b77e7e72c3b2381291e6
SHA-256 A cryptographic hash. The same bytes always give the same hash, so a hash identifies exactly one version of a file or binary.
cc39054497af609fb57706e424b25a593cf87da45c38b3975a58d96179f05d36