A swingy hand

Here’s a hand where half the field reached 6 spades (doubled once) and half did not.

The auction in the Vugraph room with Phil King as North and Andrew McIntosh as South was:

1d -(1h)-P-(2d)
2h-(P)-2s-(3h)
4NT*-(P)-5c*-(P)
6s

* RKCB and response

The other table stopped in 4 spades.