The other interesting related question from the post is how can you bid 6 after the 2NT opening for board 15?

We play a conventional defence where the bidding would go:

2NT.        X.         -       3

-              3       -       3NT

-               4      -       4

-               4      -       4NT

-                5      -       5

-                6

Where X is <= 6 losers, 3 shows <= 8 loser 4M or 5, 3 shows 4+,  3NT shows 45+m <=10 total losers, 4 is a relay asking for number of losers, 4 shows 8 losers, 4 is a relay asking for key card in hearts, 4NT shows 0 , 5 is a relay asking for K, 5 shows 1 and by inference 9 total losers. 6 is pass or correct.

Asking for key cards instead of bidding 5 pass or correct is a leap of faith but we do have good support for either minor and can be confident either partner has an 6 card minor with an A or K or 2Q ( if had only 5 minor then would have more than 6 HCP when they can have at most 5) or a 7 card  suit relying on also containing Q. After  showing 1 K it is fortunate it is K but there would also be play if not but partner would need Q. Could instead also bid 6 pass or correct after partner shows 8 losers relying on rule of 18 instead of checking for key cards as we  are not stopping below slam once this decision is made. 

This defence would give us a good result for this board but it is not without risk as we can’t stop in 4 or 4.

Does anyone else have a prepared defence they can share?

Surely the best result possible, depending on the vulnerability, is to double with these hands, and take all 13 tricks in defence, making 2000, or 2300.

Theoretically this would be true if RHO left the double in..........but this seems optimistic as they must then have either:

 x.                                              -

 xxxxx.                                      xxxxx

 xxxxxxx.                                  xxxxxxx

 -                                               x