Note South's decision to bid 3NT direct. North had an easy ride; there were eight tricks on top and a club lead guaranteed a ninth (despite the finesse against the King failing).
Why did South bid as he did? There are three reasons that point to this bid:
- 16 high card points (giving N-S a total of 28-30, which is well above the minimum for a typical 3NT contract); and
- Poor quality Spades; and
- A flat hand
At the other table, South used Stayman. The eventual 4♠ contract ran into a bad trump break and went down.