Browne v Belle- two classic Q v R endings
Here (reposted from GM Walter Browne's orbituary page) are my notes of Browne's classic 1978 win against Bell Telephone Company's BELLE chess program which had been programmed with an endgame tablebase of the Q vs R ending.
Browne's methods, in this and the previous game (which he drew) are worth careful study. The repetitive zugzwang forming the last 16 moves constitue Browne's win, a tactic well worth remembering in this ending.
For comparison here's the first game which was stopped after 45 moves, Browne conceding a draw under the 50-move rule.