Level 191 solution

Solver-verified route

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

Part of the "Deep board" chapter. The solver certified 1000+ solving lines with 89% of in-between placements being dead ends, for a difficulty score of 18.3 (grade 4 of 5).