Openings Lab
An opening is easier to remember once you have played it and then watched a master play it. Pick one of the shelf’s openings and take it from there, or play into history: make your own first moves and the computer answers as the great players did, for as long as your game follows one of theirs.
The computer here is a small on-device engine, kind on the easy side of things. It is a sparring partner, not a judge.