**How to play** Place numbers in the empty squares by clicking or tapping a number on
the pale blue row and then clicking or tapping in the chosen blank square on the puzzle. As you fill in
the empty squares, each square must include numbers 1, 2, 3, 4 or 5. A single-square colour section would
hold number 1, a two-square section would include 1 and 2, a three-square section would include 1, 2 and 3
etc.

Most important. A number must not be placed next to the same number and this includes up and down,
across

*and diagonally*. The uniqueness of this puzzle is that you start with a completely empty board
and also that it can be solved by deduction and no guesses are necessary!

When you have completed the puzzle, if you don’t get a Congratulations message, use the

**Check** button to see if there are
mistakes. If you need proof that there is an answer, here is the emergency

**Show Solution** button

and, if you completely bamboozled, the method of solving is shown on

this separate page
which you can printout if it helps.

I am hesitant to offer this but here is

another empty puzzle, size 8 x 8, and this time
deduction takes you only so far and you need to boldly guess your way to the answer.