Solver-verified route
- Place Piece 1 across column 2 row 4, column 3 row 4.
- Place Piece 2 across column 1 row 2, column 2 row 2, column 3 row 2, column 3 row 3.
- Place Piece 3 at column 2, row 3.
- Place Piece 4 across column 2 row 5, column 2 row 6, column 3 row 6, column 3 row 7.
Part of the "Column craft" chapter. The solver certified 24 solving lines with 97% of in-between placements being dead ends, for a difficulty score of 18.3 (grade 4 of 5).