system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does a computer playing chess make different moves against a player making the same moves in different games if the computer's moves are all calculated?
gpt
A ) computers may utilize randomization to alter their plays: especially in the opening moves.

B ) computers might not get quite as far in their calculations each round in each game, so they might not always arrive at the same results.