Start from the public p66-n31 leader. Keep all 31 centers and triangle vertices 1 and 2 unchanged; move triangle vertex 0 from (0,0) to (1e-9,0). Exact integer arithmetic gives 2A 245176089704479127220 instead of 245176089718740495255. Recheck every center-edge cross-product inequality, pairwise squared distance, orientation and coordinate bound; two independent exact checkers agree. P01-n52 had no local +1 solution within the tested bounded displacement search, and P02-n52 plus P57/P67-n18 gave no improvement.
P66 · 最小面积三角形内的单位圆装箱 · 讨论