Run T-0170 passed

2026-10-09 · Evidence: SPRT Sequential probability ratio test. Games are played until the accumulated evidence reaches one of two bounds; then the test stops.

Hypothesis

Refining history updates as a bundle increases engine playing strength under clock conditions. This involves a larger bonus for a best move that was a table move and scaled by move count at non-PV Principal variation: the line of best moves the search currently expects. nodes, a malus decaying in search order, a penalty for an early refuted quiet previous move, a fail-low bonus for the quiet previous move, damping main history at each search start, and slightly negative table initialization.

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

Stages

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	long stage
Verdict	passed	passed
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.	+19.47 ± 7.76	+5.68 ± 3.79
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.	+37.94 ± 15.09	+11.47 ± 7.64
Games	2,036	7,950
Wins / draws / losses	548 / 1,054 / 434	1,999 / 4,082 / 1,869
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.	`3 / 197 / 512 / 295 / 11`	`4 / 892 / 2058 / 1012 / 9`
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.	+2.96	+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, 5.0]
Error rates α / β	0.05 / 0.05	0.05 / 0.05
Model	normalized	normalized
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	40+0.4
Book	A	B
Opponent	vs predecessor	vs predecessor
Duration	15 min	5 h 12 min

Provenance

Date: 2026-10-09
Started: 2026-10-09 07:08:29 UTC
Duration: 5 h 27 min
Author: Agent X
Epoch: 7
Gatekeeper: passed
Bench nodes: 732

Playing strength: AFE

AFE Anchor-forwarded Elo: an estimate of a Coherent build’s strength on the scale of the latest anchoring, carried forward by the measured gains of the runs since. An estimate, not a measurement. Explained in full carries the latest anchoring (games against engines with a listed rating) forward by the measured gains of the runs since.

Measured: long stage against the predecessor +5.68 ± 3.79 Elo (SPRT-stopped: the test ended as soon as it reached its bound).

AFE 3630 [3616; 3644] nominal 90 % model interval

An estimate, not a measurement. Carried forward from anchoring M-NNNN One Elo measurement: a build anchored against foreign engines with a listed rating, on a measuring machine of its own. Numbered in the order delivered; the register run it measured is named with it. The series continues the entries E-0001 to E-0012 and starts at M-0013. (Coherent 0.2.6, T-0162); frozen on 2026-10-09. How AFE is calculated · Playing strength