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The tip of the day by Kit Woolsey(#67) !
After a 1♠ overcall, a double by the responder is a Sputnik that shows 4 cards in ♥ and at least 7-8H (no upper limit) !
A Sputnik double... with the diamond fit as backup
With that hand, you are below the required minimum, you must pass
Don't bid support in ♦. start by doubling, a 4-4 fit in ♥ is possible
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FR version