[Fluffy]

UDCA has this things:

Scoring: IMP

1♦-pass-3♦-3♠
pass-4♠-pass-pass
pass

---

I thoug for a while, there seems no hurry in playing diamonds now, with ♠A and ♥A we have plenty of time to recover from a bad lead and switch back to diamonds if neccesary.

So I led ♣K, wich might acomplish a lucky club ruff from partner.

low, partner plays ♣7 (UDCA) and declarer ♣A

Next comes a spade, I win ♠A and try ♣Q to see if ♣7 was doubleton. No luck.

At this point declarer has 2 free pitches from clubs, if he has 6 spades and ♦A, it is mandatory to cash ♥AK now or never.

So I play ♥A, partner plays ♥5 and declarer ♥7, second lowest again... this must be encouraging... another ♥ is played and declarer claim.

I felt so stupid lol.

[JLOL]

If you think RHO will play the H7 whenever they have the 2 in their hand (as they should), your heart play MIGHT be good (wins when partner has K5, KJ5, loses to 52), but even then I think it's bad since declarer would just fire back a club at trick 2 if they had fast heart losers, and then plan to ruff his losing diamond(s) since he has the DA. This would be a VERY convoluted and weird line if declarer had say KTxxxx 72 AQx Ax. If a declarer is good enough to always make the right falsecard (most aren't), they arent playing a trump at trick 2 if they have that.

All that said, partner's C7 was very bad, they should play the ten on the first round so you know the count and then follow it up with the 3 on the second round so you know the suit preference. Also partner should have given suit preference in trumps.

[y66]

JLOL you're too good

[Fluffy]

♣10 is not fully free, you sometimes tell declarer too much by playing it, I don't normally play UDCA count, so I am not a big expert on this matter.

[skjaeran]

Playing UDCA, the club ten is more or less automatic at trick one - signal as clearly as possible.