Time pressure

We bid these cards to the poorish 6C, which was makeable but failed. East was a passed hand. We had

No
1C2C8-10 balanced with a major
2D2Hspades & a minor
2S3C4-2-3-4
3D3S6 SPs
4C4D0 or 2 in spades (better to say 0 or 4+ SPs)
4H5Cclubs – y, diamonds – y, hearts – no
6C ?

6C was nonsense, basically requiring the SQ onside for starters, plus either the heart finesse as well or maybe 3-3 spades and good guessing.

Was West right to try for slam over 3S? Likely holdings for East are:

S-AQ, D-K– 4D (0/2) – 4H – 4S – 4N – 5D – 6Ngreat slam
S-AQ, H-K– 4D (0/2) – 4H – 4S – 5C – passgood stop
S-Q, C-A, D-K– 4N (S-y, C-y, D-y, H-no) 6C to right-sidegood slam
S-Q, C-A, H-K– 4S (S-y, C-y, D-no) – 5Cstop
S-Q, D-KQ, H-K– 4H (S-y, C-n) – 5C ugly handstop
S-A, C-A– 4S (S-y, C-y, D-no) – 5Cstop
S-A, D-KQ– 4H (S-y, C-n) – 5Cstop
S-A, D-Q, H-K– 4H (S-y, C-n) – 5Cstop
C-A, D-KQ– 4D (0/2) – 4H – 5C (yyn) – passstop
C-A, D-Q, H-K– 4D (0/2) – 4H – 5D (yyy) – 5NT !!overboard

So marginal but pretty safe most of the time. Note on the hands with S-Q and C-A, East’s king is twice as likely to be in diamonds as hearts.