Level 262 solution

Solver-verified route

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

Part of the "Master columns" chapter. The solver certified 1000+ solving lines with 52% of in-between placements being dead ends, for a difficulty score of 17.2 (grade 3 of 5).