Logic Puzzle Club

Play Puzzles Learn Club

Back

Front

New pieceTap an empty square to add it.

Piece

Name

Tap a square to move it. Drag works too.

World builder

Place pieces, write first-order sentences, and see which are true. Tap a sentence to see why.

Board

Exercises

Sentences

Write a sentence

You can also type -> for →, <-> for ↔, & for ∧, | for ∨, ~ for ¬ and != for ≠.

Saved in this browser

Keys

Arrow keys move around the board. Enter adds a piece or picks one up.
Shift and an arrow moves the picked piece. Delete removes it.
C, T and D set the shape. S, M and L set the size. N names it.
Ctrl+Z undoes. Escape lets go of a piece.

About the blocks world Use it with a class

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