Engine arena run: completed

Paired contrast slot 0 minus slot 1: +0.125 wins per game over 64 seeds (95% interval +0.024 to +0.226).

Planned: 256
Attempted: 256
Completed: 256
Incomplete: 0
Unplayed: 0

Full retained record and provenance

Run a92fb89a-cbc7-43ed-acfc-b7ff2874183c

Status: completed. Experiment: 37f466ed-4afb-43d7-8637-46246de0cacd. Tier: engine arena (paired seeds, deterministic tapes).

Planned: 256. Attempted: 256. Completed: 256. Incomplete: 0. Unplayed: 0.

Slot / seat	Wins	Completed	Win rate	95% Wilson interval	Mean points	Mean decision
0 / `v2:{"depth":2,"leaf":{"tables":"/home/keshav/settlers/res...`	131	256	51.2%	45.1%–57.2%	7.81	548.9 ms
1 / `v2:{"depth":2,"leaf":{"tables":"/home/keshav/settlers/res...`	99	256	38.7%	32.9%–44.8%	7.22	545.3 ms
2 / `eta`	17	256	6.6%	4.2%–10.4%	6.09	0.4 ms
3 / `fast`	9	256	3.5%	1.9%–6.5%	6.04	0.4 ms

Paired contrast slot 0 minus slot 1: +0.125 wins per game over 64 seeds (95% interval +0.024 to +0.226).

Manifest SHA-256: 59e0051be96ba174113d7995bc01cd7ca64d5a8e09686481fa4432a88da54508. Inventory SHA-256: 5cad12923f5f949fecdb63a600448212a82301f2349d09771fd40b9607762a15.

Games were played offline by the engine arena with explicit seeds; every seed was played once per lineup rotation. Seats received only their own redacted observation and participant events. This tier supports development and diagnosis; it is not a protocol-arena confirmation.