Solver-verified route
- Place Piece 1 across column 3 row 2, column 3 row 3, column 3 row 4, column 3 row 5.
- Place Piece 2 at column 4, row 4.
- Place Piece 3 at column 4, row 5.
Part of the "Vertical thinking" chapter. The solver certified 6 solving lines with 96% of in-between placements being dead ends, for a difficulty score of 14.6 (grade 2 of 5).