pdf23ds, most chess engines store analyzed subtrees into a transposition table. This is not the same as having a persistent strategy, but it does mean that much evaluation work can be saved by keeping a persistent state between moves.
This is similar to how iterative deepening works: in theory you could obtain the same result by performing a depth-first search directly, but iterative deepening provides a hint at the “best” moves which makes search more efficient.
pdf23ds, most chess engines store analyzed subtrees into a transposition table. This is not the same as having a persistent strategy, but it does mean that much evaluation work can be saved by keeping a persistent state between moves.
This is similar to how iterative deepening works: in theory you could obtain the same result by performing a depth-first search directly, but iterative deepening provides a hint at the “best” moves which makes search more efficient.