Engine arena run: completed

Paired contrast slot 0 minus slot 1: +0.148 wins per game over 64 seeds (95% interval +0.046 to +0.251).

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

Full retained record and provenance

Run 4a6bfee0-c5ca-4689-8c8b-0cac8df16a0d

Status: completed. Experiment: 5f6a5f32-2629-4f89-8fc6-e3e8088e1e36. 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...`	133	256	52.0%	45.8%–58.0%	8.36	935.9 ms
1 / `v2:{"depth":2,"leaf":{"tables":"/home/keshav/settlers/res...`	95	256	37.1%	31.4%–43.2%	7.39	652.7 ms
2 / `eta`	16	256	6.2%	3.9%–9.9%	6.63	0.5 ms
3 / `fast`	12	256	4.7%	2.7%–8.0%	6.56	0.5 ms

Paired contrast slot 0 minus slot 1: +0.148 wins per game over 64 seeds (95% interval +0.046 to +0.251).

Manifest SHA-256: 11d7012b456531f566f8a0086a24928aab0806f8951ada3c8ec3d8938ce7f567. Inventory SHA-256: 7b3bb3c48e97a5a1e0a0c8d5ce62101ca8b77e639936f070c8104ed6eebd1ab0.

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.