Level 218 solution

Solver-verified route

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

Part of the "Final columns" chapter. The solver certified 816 solving lines with 89% of in-between placements being dead ends, for a difficulty score of 18.9 (grade 4 of 5).