Solver-verified route
- Place Piece 1 across column 3 row 4, column 4 row 4, column 5 row 4.
- Place Piece 2 across column 6 row 3, column 6 row 4, column 6 row 5, column 7 row 5.
- Place Piece 3 across column 4 row 3, column 5 row 3.
- Place Piece 4 at column 8, row 5.
Part of the "Corner work" chapter. The solver certified 24 solving lines with 97% of in-between placements being dead ends, for a difficulty score of 18.5 (grade 4 of 5).