Gib playing with GIB bid to 4♠ on the 5-1 fit,
North opened with ♦T to the Ace, ♠J was taken with ♠A in south, who shifted to ♣3 to ♣Q,
Now 3 more ♠ South dropping a ♥ on the last
Leaving
There are now 6 safe tricks by unblocking ♣, something we learn the beginners the should always look for.
For some reason I can't figure out, GIB played a ♦, and went down as ♣ were 4-1. I can't find any distribution, where GIB could win 11 tricks.
Even with a small set of samples in the simulation I would expect ♣ to be 4-1 of some of the samples.