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Transparent Yajilin (123)

Instruction:
Blacken some white cells and draw a closed loop passing through centres of all remaining white cells horizontally or vertically. Blackened cells cannot share an edge with each other. The loop can pass through clue cells, and clue cells that are not passed through must be blackened. Numbered arrows in white cells indicate the total number of blackened cells in the direction pointed at by the arrow. Numbers in blackened clue cells do not necessarily have to be satisfied.

Reference: WPC 2017 (11)

Parent puzzle:
Yajilin