Solver-verified route
- Place Piece 1 across column 8 row 2, column 8 row 3, column 8 row 4.
- Place Piece 2 across column 6 row 4, column 7 row 4, column 6 row 5.
- Place Piece 3 across column 7 row 2, column 7 row 3.
- Place Piece 4 across column 6 row 6, column 6 row 7, column 7 row 7, column 7 row 8.
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).