![bridge problem](https://www.funbridge.com/blog/wp-content/uploads/bridge-problem-puzzle-pink-1-1052x423.jpg)
Problem: An Underground Track
![bridge problem](https://www.funbridge.com/blog/wp-content/uploads/bridge-problem-puzzle-pink-1-1024x576.jpg)
Your hand sitting South
![hand](https://www.funbridge.com/blog/wp-content/uploads/hand-5-1024x472.png)
Bidding
Dealer North. Game all.
![bidding](https://www.funbridge.com/blog/wp-content/uploads/bididng-1024x681.png)
Card play
![cards game](https://www.funbridge.com/blog/wp-content/uploads/cards_game-1-382x1024.png)
Lead: Jack of ♠.
Don’t be confused! After 4NT, Blackwood with clubs as trumps, 5♥ is asking about the trump Queen. This is not a conclusion. If South had chosen to play a ♥, he woud have bid 3♥ over 3♣.
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If East refuse to cash CQ , then club back to King and then Diam to 7 and Diam 10 , then D9 is good to run clubs.