Why GIB finesse instead of just taking the rest of the tricks?

[xeno123]

At trick 7 in the following hand, GIB elected to finesse in spades (going down 3) instead of just going up with the ace and simply taking the rest of the tricks (AS, QC and the 5 high diamonds), so making 3NT irrespective of the distribution:

 

http://tinyurl.com/44nlucd

 

(I realize the contract is unmakeable if W holds up the diamond King so the end result is not that unfair, but that is a separate issue).

 

Peter

[cloa513]

At trick 7 in the following hand, GIB elected to finesse in spades (going down 3) instead of just going up with the ace and simply taking the rest of the tricks (AS, QC and the 5 high diamonds), so making 3NT irrespective of the distribution:

 

http://tinyurl.com/44nlucd

 

(I realize the contract is unmakeable if W holds up the diamond King so the end result is not that unfair, but that is a separate issue).

 

Peter

Logically North should win the hearts with the J as LHO could hardly be leading from AKJxx but could be leading from AQ10xx(x). North should not continue hearts as it just indicates how to play the hand and sets up hearts. Then set up diamonds so whoever wins will be encouraged to play more hearts.

 

When does GIB follow logic.