Always 20!

There are nine disks in this puzzle. Each disk contains four digits. There is a number in the empty space between any four disks. The number is equal to the sum of the digits adjacent to the space from the respective disks - just as shown in the illustration below.

The goal is to rotate the disks in order to make each of the four numbers equal 20 as soon as possible. This is always possible. A disk can be rotated in any direction either quarter of turn or half of turn. Just place mouse cursor over the disk and the arrows will show the angle and direction of the rotation. Click the respective arrow to initiate the rotation.

If you complete a challenge:
- in less than 20 seconds;
- in less than your best time;
- and in less than the last time in the Record Table, a button to submit your time will be shown in order it is recorded in the World's Best Records shown below.

Good Luck!

World's Best Records
Name	Country	Result
Author		17,371"
<empty>	<empty>	<empty>
<empty>	<empty>	<empty>
<empty>	<empty>	<empty>
<empty>	<empty>	<empty>
<empty>	<empty>	<empty>
<empty>	<empty>	<empty>
<empty>	<empty>	<empty>
<empty>	<empty>	<empty>
<empty>	<empty>	<empty>