Russian Loop
Russian Loop is a loop-drawing puzzle introduced by Olga Leontieva for the Russian Puzzle Championship 2021.
The puzzle is based on a distinctive local similarity restriction applied to loop segments, which governs how neighboring cells behave relative to each other. This creates a structured pattern that solvers must carefully track while constructing the loop.
Although the logical steps are generally straightforward and do not require highly complex deductions, the puzzle is demanding in terms of accuracy and attentiveness. Small oversights can easily lead to inconsistencies, making careful execution essential.
The puzzle is based on a distinctive local similarity restriction applied to loop segments, which governs how neighboring cells behave relative to each other. This creates a structured pattern that solvers must carefully track while constructing the loop.
Although the logical steps are generally straightforward and do not require highly complex deductions, the puzzle is demanding in terms of accuracy and attentiveness. Small oversights can easily lead to inconsistencies, making careful execution essential.
Rules
Draw a single continuous loop in the grid using horizontal and vertical line segments so that the loop visits every square exactly once. Each cell belongs to one of two types: those where line goes straight and those where line turns. Dots are located between all horizontally neighboring cells of the same type.
Click to see the answer.