In article .com,
help bot wrote:

To my mind, "solving" checkers would not simply
mean being able to handle any human or present
computer opponent without losing; instead, I want
to have every legal checkers position scored as a
win/loss/draw, by calculating every simpler position
that can arise from it and so forth; like the endgame
tablebases in chess. I suppose you would begin
with the simplest positions, and work backwards,
adding more and more for many years until one day,
your efforts suddenly hit a wall -- having tackled
every legal position and tallied the results.

They've done this.

Checkers is solved.