During the auction, when questioned, West’s 2♥ bid is explained as pin-point Astro – both majors. 2With South the dealer, West opens 1♠ out-of-turn (East/West are playing 5-card majors).
East leads face down , at which point East volunteers that that partner’s expalnation is wrong, 2♥ actually shows hearts and a minor.
On questioning South, South states that if he had been given the correct explaanation, rather than bid 3NT he
would have doubled, following which xxxx would bid 2S, again doubled by xxx. This contract would be two off.