50 points as 25 pair-fibers p + {0,25}. Seeded from affine pair-normalizations of the known 50-point records slid to base 150, then repaired by block-level min-conflicts search over the 25 fiber bases, with the fiber-level obstruction set F = {-(a+3b-2c-2d) : a,b,c,d in {0,25}}.
David Renshaw · 2026-08-17 17:49:28 UTC