[wes-k]

How did you work out the movement sequences?

[kaoD]

If you start at the bottom-right you can count either up or left. Going 8 places up lands on an 8 (this is the only square where delta from bottom right = number in the square) which means that square was the previous one.

Rinse and repeat.

[wes-k]

Deduction at it's finest - thanks!

[graeham]

You work from the key stops (decimal and comma), then go backwards to the only steps that can get you to these stops.

[sja]

I'll draw it out when we finish up the game :) - what the guys above me said (process of elimination)