Level 129 solution

Solver-verified route

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

Part of the "Four lanes" chapter. The solver certified 120 solving lines with 96% of in-between placements being dead ends, for a difficulty score of 18.8 (grade 4 of 5).