Stackruns

Run T-0028 passed

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

Hypothesis

Depth- and move-count-dependent reductions of up to three plies for late quiet moves, softened at principal-variation nodes and for killer, countermove, or high-history moves and followed by a full-depth re-search after an alpha raise, should make Coherent stronger by spending fewer nodes on unlikely late alternatives.

Predecessor set to: T-0028

Stages

Elo against the predecessorElo intervals: short stage +22.28 ± 10.29.0+10+20+30short stage+22.28 ± 10.29short stage · passed+22.28 ± 10.29 Elo · 2,842 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.+22.28 ± 10.29–
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.+27.74 ± 12.77–
Games2,842486
Wins / draws / losses1,122 / 780 / 940486 / 0 / 0
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.133 / 249 / 529 / 323 / 1870 / 0 / 0 / 0 / 243
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).+2.95+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
Opponentvs predecessorvs reference v0
Duration20 min9 min

Provenance

Date
2026-08-29
Started
2026-08-29 13:25:52 UTC
Duration
29 min
Author
Agent B
Bench nodes
3,786
Commit
257bdb2c2d4a463250163e74f9b1830758a5cce0
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.
e8032e571895f6c36687445d499eb3a0d2cd25df36ad8140a0bebea5c65d7db7