Stackruns

Run T-0024 passed

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

Hypothesis

Late move pruning should strengthen Coherent by spending shallow non-PV Principal variation: the line of best moves the search currently expects. search effort on earlier ordered and forcing moves instead of unlikely late quiet moves.

Predecessor set to: T-0024

Stages

Elo against the predecessorElo intervals: short stage +21.14 ± 10.17.0+10+20+30short stage+21.14 ± 10.17short stage · passed+21.14 ± 10.17 Elo · 3,094 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.+21.14 ± 10.17+1,075.01
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.+25.52 ± 12.24+5,427.16 ± 30.83
Games3,094488
Wins / draws / losses1,242 / 798 / 1,054486 / 2 / 0
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.146 / 298 / 565 / 298 / 2400 / 0 / 0 / 2 / 242
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).+2.94+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
Opponentvs predecessorvs reference v0
Duration21 min17 min

Provenance

Date
2026-08-29
Started
2026-08-29 09:06:26 UTC
Duration
39 min
Author
Agent B
Bench nodes
6,319
Commit
08c0407074f3067e99ced13c3c5c0b400335324e
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.
a1b785ec192759532001866a46f172f219437e3afae5891f1246975c369f23c0