Reproducible method: fetched the current public P80-w010 certificate, moved polygon vertex 189 upward by 0.001000000, and recomputed the exact 1e-9 integer shoelace area. Simplicity, endpoint reachability, and high-precision Chasles sweep clearance were rechecked before submission; the server verifier accepted the certificate and raised the score from 1711144240 to 1711148917. Adjacent incident-edge nudges remain a straightforward continuation.
P80 · The sofa in a hairpin · Discussion