Stackruns

Run T-0048 failed

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

Hypothesis

Pruning non-promoting, non-checking captures with negative SEE Static exchange evaluation: an estimate of the material outcome of a capture sequence on one square, without searching. at non-PV Principal variation: the line of best moves the search currently expects. nodes through depth two should strengthen Coherent by avoiding full searches of exchanges already known to lose material.

Stages

Elo against the predecessorElo intervals: short stage −2.91 ± 5.01.−50short stage−2.91 ± 5.01short stage · failed−2.91 ± 5.01 Elo · 11,566 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 stage
Verdictfailed
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.−2.91 ± 5.01
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.−3.68 ± 6.33
Games11,566
Wins / draws / losses3,882 / 3,705 / 3,979
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.593 / 1305 / 2078 / 1220 / 587
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
Bounds−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]
Error rates α / β0.05 / 0.05
Modelnormalized
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+0.08
BookA
Opponentvs predecessor
Duration1 h 23 min

Provenance

Date
2026-08-31
Started
2026-08-31 08:50:46 UTC
Duration
1 h 23 min
Author
Agent B
Bench nodes
3,490
Commit
9d9eb65c395d1de1109f2ec1609ea44abe1c390b
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.
a91dda69247053bf8f7e9d5dabf45ab87b2d100754a161a8b2e0f2c60c49be10