spot tested these strategies, they help. when i deviated from it in a fit of panic i lost. similarly, i also find that keeping the small tiles accessible - out

spot tested these strategies, they help. when i deviated from it in a fit of panic i lost. similarly, i also find that keeping the small tiles accessible - outside - helps tremendously. if you never move down you get that for free, because you never make open space on top for a 2 to come in (and not combine with your 512 or whatever).