TripleCross

This puzzle is like a crossword, but uses numbers on a hexagonal grid. "Words" can go across, up, and down.

Cube

This puzzle is three-dimensional where "words" can go in X, Y, and Z directions.

This puzzle is three-dimensional with non-uniform sizes. "Words" can go in X, Y, and Z directions.

This puzzle is like a crossword, but uses numbers instead of letters. "Words" can go across and down.

This is a Slitherlink puzzle with a twist -- lines can go diagonally across the boxes!

This puzzle is hard! It is three-dimensional and does not have a good two-dimensional representation. It will challenge your visualization skills!

The logo for this site is also a puzzle!

This is a CrossFigure puzzle where all the "words" are prime numbers.

This is a CrossFigure puzzle where all the "words" are squares.