Similar level to Radiation, but a different solution. I was never good at simple arithmetic >.< Very tricky solution, would've made a good addition to PP1 at about level 65. I could ask him if you like. :) Two distinct ways of beating this. Both are good solutions :p No idea how that saved moves, and still don't see how it links to the solution I had of the other level.
Tricky solution and a nice level though :p Brilliant solution, lots of places to lose a couple of moves with well hidden tricks. Took me long enough to even work out how to get to the end. Got it quite quickly once I had though - the order is pretty logical. 
Insights