jammen, on 2018-April-01, 11:21, said:
After the bot false carded me twice in the first four tricks I conceded the hand even though we could still have beaten the contract if North had ruffed the first discard and then switched to a heart. Typically, however, when the bot is partner it waits until the second discard before ruffing in, or saves its high trump til the end.
It's almost as likely the declarer GIB would blunder if given a chance. I never concede tricks unless I know that either declarer or dummy is locked in hand with only 100% winners left.
jammen, on 2018-April-01, 11:21, said:
1) Why did it lead the 4♦ from J4?
Maybe GIB switched to 2nd and 4th best leads? Really, who knows. GIB makes many random bids and plays.
jammen, on 2018-April-01, 11:21, said:
2) Why did it false card the J♠? This can only fool partner.
In general, you should assume GIB is randomly tossing cards. In theory, GIB plays some count signals but it's not consistent with them.