D57 — M8 closed with its gate not met

Decision

M8 is closed with its gate measured and not met: from-scratch clean pass 85 % on the held-out set S (gate 90 %). R6 cut proofs are built (--cut-report); R4, R5, GPU tempering and CP-SAT windows are not

Alternatives

Keep M8 open until 90 %; build the remaining rungs

Reason

Four of the six failing boards cannot be made clean by any placement under the rules the judge applies (three have a part that fits nowhere legally, one is not routable clean in its human placement); cut lines are at most 40 % full and the group re-route changed no board (doc 04 §10, doc 05 §20)