To solve an Addoku, use only the numbers from 1 to 9. The numbers in squares linked by a coloured line must add up to the total given in the top left-hand corner of the set of linked squares. No individual number is repeated in any of these sets of linked squares.

Similar to Sudoku, the numbers 1 to 9 must also appear in:

  • Each of the nine vertical columns
  • Each of the nine horizontal row
  • Each of the nine 3 x 3 boxes

Use the mouse to click up (or down) through the numbers 1 to 9 in each square. The small black arrows on each side of the square tell you whether you are counting from 1 up to 9 (right arrow) or from 9 down to 1 (left arrow).

Using your keyboard, you can type in up to eight practice numbers below the line at the top of each box.

When you have correctly completed a linked set of cells, that area fills with colour and any practice numbers will disappear.

Game Options

SAVE: Click to save your Addoku

  • YouPlay Premium Members receive 10 save slots
  • YouPlay Members receive 3 save slots

PAUSE: Click to halt the timer if you wish to pause during game play

EXIT: Click to return to the Game Selection page

UNDO: Undo your moves one click at a time

CLEAR GRID: Undo all moves and start the Addoku again

Game Features

TOKEN COUNTER: Displays how many tokens you have won during the game

TIMER: The timer starts as soon as you open the Addoku

YouPlay BOOST: Boost your score – multiply your points by working faster and smarter

HINTS: Click to add an extra number to help you solve the Addoku

  • YouPlay Premium Members receive 5 hints
  • Youplay Members receive 5 hints