Solver-verified route
- Place Piece 1 across column 4 row 6, column 5 row 6, column 4 row 7.
- Place Piece 2 at column 5, row 5.
- Place Piece 3 at column 6, row 8.
- Place Piece 4 across column 6 row 6, column 5 row 7, column 6 row 7.
Part of the "Column craft" chapter. The solver certified 24 solving lines with 96% of in-between placements being dead ends, for a difficulty score of 18.1 (grade 4 of 5).