Solver-verified route
- Place Piece 1 across column 2 row 3, column 2 row 4, column 2 row 5.
- Place Piece 2 at column 2, row 7.
- Place Piece 3 across column 2 row 6, column 3 row 6, column 3 row 7.
Part of the "Vertical thinking" chapter. The solver certified 6 solving lines with 98% of in-between placements being dead ends, for a difficulty score of 16.1 (grade 2 of 5).