I was white in this game with "John's Connect Four Playground," a "perfect playing connect-4 program" Its "12Kbyte database of all 8 ply positions" did not stop it from making a losing mistake on its second move.
1) d1 - a1
2) f1 - b1??
3) e1 - g1
4) c1*
No human expert would let me win in four moves, regardless of who started. What constitutes perfect play as black is subjective, of course, but that is exactly why humans are better at it.
(hide) If you are waiting for your turn, click on "change" next to the "refresh" on the main page, then set refresh the page to 30 seconds to get your turn to move displayed faster. (Servant) (show all tips)