Mentioned this in the Prior Art section and another comment here, but his "moves" are single-square steps. Running my solve utility on his hardest puzzle yield

Mentioned this in the Prior Art section and another comment here, but his "moves" are single-square steps. Running my solve utility on his hardest puzzle yields: $ go run cmd/solve/main.go BBBCDEFGGCDEF.AADEHHI....JI.KK.JLLMM {true [A-1 C+2 B+1 E+1 F-1 A-1 I-1 K-2 D+2 B+2 G+2 I-2 A+1 H+1 F+4 A-1 H-1 I+2 B-2 E-1 G-3 C-1 D-2 I-1 H+4 F-1 J-1 K+2 L-2 C+3 I+3 A+2 G+2 F-3 H-2 D+1 B+1 J-3 A-2 H-2 C-2 I-2 K-4 C+1 I+1 M-2 D+2 E+3 A+4] 49 93 49 12266 1494475} 93 steps, but just 49 moves. That puzzle is on line 13 of my database: 49 BBBKLMHCCKLMH.AALMDDJ....IJEE..IFFGG 24132 https://www.michaelfogleman.com/static/rush/rush1000.txt https://www.michaelfogleman.com/static/rush/rush1000.txt