Chess·Play

First: what counts as winning?

You win by checkmate: the opposing king is attacked and no legal move removes the attack. Kings are not actually captured; you need not capture everything. Resignation also ends a game.

If the attacked king can escape, it is only check, not victory. No legal move without check is stalemate, a draw rather than a win.

Completing an opening sequence means exercise complete; only a mating position is a checkmate win.