Stackruns

Run T-0083 passed

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

Hypothesis

An improving signal derived from the evaluation of the same side two plies earlier is initially used exclusively to reduce the reverse futility pruning margin.

Wording edited for publication from the German entry; the register carries the author’s own text.

Stages

Elo against the predecessorElo intervals: short stage +5.10 ± 3.94; long stage +2.84 ± 2.24.0+2+4+6+8+10short stage+5.10 ± 3.94short stage · passed+5.10 ± 3.94 Elo · 15,588 gameslong stage+2.84 ± 2.24long stage · passed+2.84 ± 2.24 Elo · 42,252 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.+5.10 ± 3.94+2.84 ± 2.24
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.+7.07 ± 5.45+4.20 ± 3.31
Games15,58842,252
Wins / draws / losses4,724 / 6,369 / 4,49512,298 / 18,001 / 11,953
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.505 / 1848 / 2945 / 1905 / 5911133 / 4919 / 8698 / 5222 / 1154
LLR Log-likelihood ratio, the running evidence of an SPRT. It starts at 0; a stage passes at the upper bound and fails at the lower one.+2.95+2.97
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, 5.0]
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 predecessor
Duration1 h 56 min26 h 35 min

Provenance

Date
2026-09-15
Started
2026-09-15 03:09:45 UTC
Duration
28 h 31 min
Author
Agent D
Epoch
4
Gatekeeper
passed
Bench nodes
3,240