Combiku™ rules are very simple.

• You are given a 5x5 board which contains some numbers and letters on it.
• Use the mouse to drag other Numbers or Letters from the sides into the board squares.
• Your objective is to place one Number and one Letter in each square.
  • Two squares cannot have the same combination Number-Letter.
  • And a Number (or Letter) cannot be repeated in the same column (or row).
• You may prefer to use Shapes and Colors instead of Numbers and Letters.

Don't hesitate to use the following features:

• Save a puzzle to resume it later.
• Let the computer play for you and explain the move.
• Undo-Redo your movements.
• Display little notes on each square to keep track of your own conclusions.
• Switch between "Numbers and Letters" and "Shapes and Colors".
• Highlight the first square with a mistake with respect to the puzzle solution.

Combiku puzzles are rated from 1 to 5 stars (5 being the hardest). All puzzles have one and only one solution.