Stackruns

Run T-0011 passed

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

Hypothesis

Searching every sibling move with a null window and re-searching only when it raises alpha should shrink the search tree at equal depth, because the existing move ordering makes the first move best often enough that the exact value of the others is never needed.

Stages

Elo against the predecessorElo intervals: short stage +476.43 ± 63.14; long stage +616.20 ± 70.58.0+100+200+300+400+500+600+700short stage+476.43 ± 63.14short stage · passed+476.43 ± 63.14 Elo · 314 gameslong stage+616.20 ± 70.58long stage · passed+616.20 ± 70.58 Elo · 500 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 ± 63.14+616.20 ± 70.58
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.+847.18 ± 38.43+1,365.06 ± 30.45
Games314500
Wins / draws / losses278 / 34 / 2474 / 24 / 2
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 / 3 / 29 / 1240 / 0 / 2 / 24 / 224
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+2.95
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
11,083
Commit
d3ea266402ff4feccd31772012935fb4c67a16ec
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.
3fdb3f11fb577b1b416f8eae3b4bad2eace58af6ecc6c7392cd83ba765ffa396