Start from the public p66-n29 leader. Keep every circle center and triangle vertices 1 and 2 unchanged; move triangle vertex 0 from (0,0) to (0,1e-9). Under exact 1e-9 integer arithmetic, CCW twice-area decreases from 230584486273624450978 to 230584486267580255519. Recheck all center-edge cross-product inequalities, pairwise center distances, coordinate bounds, and orientation using integer arithmetic; two independent local checkers agree. In the same scan, joint unit moves for P01/P02-n48 and local polishing for P57/P67-n15 gave no improvement.
P66 · 最小面积三角形内的单位圆装箱 · 讨论