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4 spades double dummy


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Came up with this problem today, please enjoy :)

[hv=pc=n&s=sa3h74dakq3cakq82&w=skjt86hqjt9d74c73&n=sq975hak852d95c96&e=s42h63djt862cjt54]399|300[/hv]

 

1. Make 4 spades on the lead of the 7

 

2. Find all 4 pairs of consecutive cards (two cards that are one apart from value in the same suit, such as a 10 and a jack) that, when switched, makes the contract unmakeable against best defense. For example, if one switched the KQ, giving north the Q and west the K, but this does not defeat the contract.

 

 

Don't open the spoiler until you figure out problem 2.

 

3. Switching the 6 and the 7 is one of the answers to problem 2. Defeat the contract double-dummy after switching these two cards.

 

 

just for kicks:

4. Defeat 5 in the south.

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