Solver-verified route
- Place Piece 1 across column 1 row 4, column 1 row 5, column 1 row 6, column 1 row 7.
- Place Piece 2 across column 1 row 3, column 2 row 3, column 2 row 4.
- Place Piece 3 at column 2, row 5.
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 16.4 (grade 2 of 5).