This one is by far the worst.
1C (strong)--1D (H or pts)
1S (denies 3H 15-20 show at least 3S)- 2C (D weak or H+D GF)
2D (at least 2D denies 6S)--3S (exactly 0544)
???
our keyc are most fit likely first with equal probabilty lenght is HSCD. When we dont have enough space 4D is PES.
So here i think that soff in 4H is possible but keycarding in H is jsut too unlikely.So the best should be
4C= RKC C
4D RKC D
4H to play
4S 18-20 5233 with nothing wasted in S
However ive stuck to our default agreements, 4D is PES since we dont have 3 keycards bid available taht dont interfere with our signoffs but it was super dumb of me to pass 4S since i know partner doesnt have 6S (i jsut have to bid 5Nt pick a slam).
I would really like to have good PES, RKC & exclusion agreements when we finish describing our shape too high. Any ideas any links ?