Pop your brain into gear for this simplified and unique variation of Sudoku.

Set amongst the clouds of China in a serene yet vibrant atmosphere is Diamond Doku.

The levels get progressively more difficult to keep things interesting.

Just place the jewelled numbers on the white tiles, but make sure they aren’t in line with any of the same numbers. Click on the numbers to swap them over, and keep an eye on the timer!

Look out for ‘locked’ numbers, these are locked in place with a padlock symbol and can not be moved!The “Wildcards” can be useful to remove conflicting numbers. These are unlimited, but each one will cost you 2000 points! So use wisely!

Alternatively use the “shuffle” option to change the entire board around if it’s getting a bit tricky. You can only do this 3 times on each level, but you won’t lose any points.

Top Tip: To get the swap bonus, try completing levels 1, 2 and 3 in 8 swaps, and levels 4, 5 and 6 in 16 swaps.

Diamond Doku… One minute, six levels, two stages on each. It’s go, go, go!