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Multi ESB (275)

Instruction:
Draw several closed loops in the grid passing through centres of cells horizontally and vertically, so that each cell is visited by exactly one loop. The loops must turn at breakpoints, i.e., cells with circles. Additionally, for each loop, there must be exactly one turn between two breakpoints that the loop visits. A loop cannot cross or overlap other loops.

Reference: WPC 2017 (11)