...however with chess, you do not need to practice in order to learn how to move a pawn one square...
But you need to practice to figure out which pawn to move, and WHY!
No one has mentioned that both games require strategy and theory.
In chess you have to know tactical moves (pinning with a knight, controlling a file with a rook, etc.). In one pocket, you have to know banks, combinations, 'seeing the move'.
Also in chess, from the theory side, there is attacking up the middle vs sitting on the sides and bushwacking the point coming up the middle. In one pocket, there are some who like to park balls up at the other end (defensive) and some who play aggressive (just like chess's playing up the middle) and try to run out.
And then there is playing the player. In chess you know things like which opening moves a player favors and where his weaknesses are. Similar in one pocket.
Chess is probably the most similar game to one pocket.