Battle between both sides. ♠ s versus ♥ s and how high to bid.

West will open 1♥ 

North will bid a weak jump overcall with 2♠ 

East has a good ♣ suit and 12HCPs so can bid 3♣ (unless you are using 5 card majors)

South will bid 3♠ 

West has a fit with ♣ s but wants to show 6 card ♥ suit. Difficult but many will bid 4♥ s.

North will pass he has shown his hand, East will also pass.

South then has a difficult decision but many will bid 4♠ s.

Most opponents with this type of bidding will double the game contracts of 4♥ or 4♠ . Both should go down with correct play.

All double game contracts made so +790 in both directions!!

But to do it East has to cash A♥ , A♣ and lead another ♣ that will reduce South to 2 trumps, so when ♠ s are played West will win ♦ finesse and play the winning K♣ .