I think that’s a good general rule. Check out PT 24 Game 4, great application of this. It’s not how JY does it, but by splitting into three boards based on the second rule which does exactly what you’re talking about, this game was a breeze.
... of not knowing which game board comes into play and misreading ... as far as the game board is concerned, even though they ... to uniformly translate to game board set ups I've seen ...