Discern: Hidden Rule Puzzle

A board of shapes and a few lamps. Draw a line across the cells and the lamps answer: lit means the rule is kept, dark means it is broken. But nobody tells you the rules. You have to discern them.

How it works: • Every lamp is a hidden rule. "Pass through every circle"? "Never step on a triangle"? Test your guesses with lines. • The rules are shared by the whole chapter. Compare the levels you solved: they hold the key to the next one. • Light every lamp and the chapter reveals its rules.

What's inside: • 15 chapters and 90 levels: colors, forms, turns, where the line starts and ends, counting shapes, and all of them combined • Each chapter brings a new set of rules and a new "aha!" • Step by step hints: first where the line went wrong, then which shapes the rule is about, and only at the end the solution • Gold lamps for levels solved without hints • A tutorial that takes half a minute • Light and dark themes • Calm music and sound effects with volume sliders • No ads, no purchases • Works offline and collects no data • English and Russian

No timer and no penalties: try as many lines as you like until the rule clicks.