It takes an act of of the morph gods to hit the odds that you want. Just keep trying it till the stars align
You have to do the square thing to make sure your combo is even possible! Then you can start the morph gods. If you keep putting your axanthic with your albino you will never get a snow regardless of how the stars are aligned!
It was for a specific recessive combo I was asked for but Punnett's are for inheritance possibilities and inheritance happens at the genotype level which is independent of mutation type (as long as we exclude sex linked). So we could consider this a quad co-dominant cross if we just change the key to define the letters differently.
It could use some more polishing but if anyone wants it I've got Excel formulas and a macro to make these html type Punnett squares much more easily than it looks.