Shingoki: Loop Puzzle

Shingoki is a loop puzzle on a grid of dots. Draw exactly one closed loop that passes through every circle – not two, not one with a loose end. One. THE COMPLETE RULES, IN FOUR LINES • White circle: the loop goes straight through. • Black circle: the loop turns. • The number is the sum of the two straight arms, each up to the next turn. • Every dot carries either no lines or exactly two. That is all there is to learn. The depth comes from how the rules interact, not from special cases – and the tutorial takes two minutes. ONE PUZZLE A DAY Every calendar day brings one daily puzzle, and it is the same one for everyone in the world. One attempt. The clock starts with your first line, not when you open it – so you can study the clues first. Solve every day and you build a streak. One missed day per month is bridged, so a bad day does not cost you weeks. YOUR TIME IS THE SCORE No points, no…