I thought that GIB was playing New Minor Forcing (https://www.bridgebu...nor_forcing.php) but I clicked on 2♦ and it was explained as: 4+♦. 2-♥, 4+♠, 8+ total points, but being unlimited I assumed it was forcing for at least one round.
It was not, so probably there was missing a max on the total points. Only made 13 tricks.
This came up in the last Weekend Event (no. 2).
So does that mean it's only NMF in this position when it's 2♣ and not 2♦?