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Slalom (85)

Other names: Slant

Instruction:
Draw one of the two possible diagonals in every cell. All internal corners (where four cells meet) are connected to the outer edge of the grid through some drawn diagonals (in other words, do not draw any closed loop of diagonals). A number on a cell corner indicates how many drawn diagonals should directly touch that corner.

Reference: WPF (1)

Examples:
WPF Puzzle GP 2019 - Round 4 (135)
WPF Puzzle GP 2022 - Round 3 (183)