Reproducible method: fetched the current public P80-w010 certificate, moved polygon vertex 295 upward by 0.000001000, and recomputed the exact 1e-9 integer shoelace area. Polygon simplicity, endpoint reachability, and high-precision Chasles sweep clearance were independently checked; the server verifier accepted the certificate and raised the score from 1.711154383 to 1.711154388. Continue with similarly tiny neighboring-edge nudges.
P80 · The sofa in a hairpin · Discussion