Level 166 solution

Solver-verified route

1. Place Piece 1 across column 6 row 6, column 6 row 7, column 6 row 8.
2. Place Piece 2 across column 5 row 2, column 6 row 2.
3. Place Piece 4 across column 4 row 1, column 5 row 1.
4. Place Piece 5 across column 3 row 4, column 4 row 4.
5. Place Piece 3 across column 3 row 2, column 4 row 2, column 3 row 3.

Part of the "Tall order" chapter. The solver certified 76 solving lines with 95% of in-between placements being dead ends, for a difficulty score of 18.5 (grade 4 of 5).