Dealer: North Vul: EW MP Scoring

West

2
3
Pass

North
Pass
2
Pass
Pass

East
Pass
Pass
3
Pass

South
1
Pass
3

Correcting to an Original Suit

West's 3

bid was inferior to 2N, which would have shown 6+ diamonds and 4+ clubs.
A 3

bid should include at least another club.
Based on the auction, West decided that East would probably be ruffing the 3rd round of clubs and the

A was led.
East signalled 'upside down count' with the

5 (odd number).
Another club was continued, East assuming West would have underled a remaining

K964.
Declarer ruffed, won the

A and

J (discarding a diamond) and eventually won 4 spades, 4 hearts and 2 clubs.

On a singleton heart lead, proper defence should secure at least 1 spade, 1 heart ruff, 2 diamonds and 1 club.