Engine arena run: completed

Paired contrast slot 0 minus slot 1: +0.148 wins per game over 64 seeds (95% interval +0.044 to +0.252).

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

Full retained record and provenance

Run 464e3582-9583-4ff3-8621-dc6dafd42073

Status: completed. Experiment: 449ea466-728b-45e0-a177-9c220e3e8415. 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%	7.78	1093.5 ms
1 / `v2:{"depth":2,"leaf":{"tables":"/home/keshav/settlers/res...`	95	256	37.1%	31.4%–43.2%	7.28	628.8 ms
2 / `eta`	15	256	5.9%	3.6%–9.4%	6.34	0.5 ms
3 / `fast`	13	256	5.1%	3.0%–8.5%	6.29	0.5 ms

Paired contrast slot 0 minus slot 1: +0.148 wins per game over 64 seeds (95% interval +0.044 to +0.252).

Manifest SHA-256: f528f7dcd5ba68939699160770a762deab2a12c7d31a3dcb14d041def9b5a036. Inventory SHA-256: a3443a604ecef3dc115d96b6f972e50b0ddf7f9e1d03d853c3dae252dbe4a902.

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.