Level 169 solution

Solver-verified route

1. Place Piece 1 across column 4 row 3, column 4 row 4, column 5 row 4, column 4 row 5.
2. Place Piece 2 across column 5 row 2, column 6 row 2, column 5 row 3, column 6 row 3.
3. Place Piece 4 across column 5 row 5, column 6 row 5, column 5 row 6, column 6 row 6.
4. Place Piece 3 at column 3, row 4.
5. Place Piece 5 across column 4 row 1, column 5 row 1, column 4 row 2.

Part of the "Tall order" chapter. The solver certified 120 solving lines with 96% of in-between placements being dead ends, for a difficulty score of 18.7 (grade 4 of 5).