Tunnels

Identify the underlying line-drawing rules in a collection of domino arrangements.

Figure out how to validate each symbol in increasingly complex logic puzzles.

Infer a consistent set of rules that yield a unique solution to each line-drawing puzzle.

Experiment with grid-shading logic puzzles and discover the rules of the cryptic glyphs.

Find words within arrangements of old letter-stamped coins.

It's just 12 word searches. I swear.

An early collection of logic puzzles where pinning down the rules is part of the challenge.

Infer the rules behind a series of grid-based puzzles based on the unicity of each solution.