Solver-verified route
- Place Piece 1 across column 5 row 6, column 5 row 7.
- Place Piece 2 across column 4 row 1, column 4 row 2, column 4 row 3, column 4 row 4.
- Place Piece 3 at column 4, row 5.
- Place Piece 4 across column 3 row 6, column 4 row 6.
Part of the "Column craft" chapter. The solver certified 52 solving lines with 97% of in-between placements being dead ends, for a difficulty score of 18.1 (grade 4 of 5).