This is board 19 of round 2 of the Rosenblum Cup. Out of the 128 NS pairs holding this cards, only 5 pairs managed to bid the 100% cold 6NT while another 8 arrived in the making 6♦. And one failed in 6♥ and another one failed in 7♦.
Not sure this hand is really so difficult to bid. Can you bid to the optimal contract using your favorite system?

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