Solve some classic logic puzzles, inspired by those found in “What is the Name of this Book?” by Raymond M. Smullyan.

Knights and Knaves Source Blog postMore classic logic puzzles, inspired by those found in “What is the Name of this Book?” by Raymond M. Smullyan.

Portia's Caskets Source Blog postA page to try out solutions to classic chess problems, like the 8 queens puzzle.

Chessdom page SourceGenerates examples of polynomial division using the grid method. Information about the method can be found on various posts linked to this one

Polygrid Page Blog post SourcePlay with a set of tiles that together make plaits and knots.

Quiltic Page Blog post Source