Support Partner or not?

Hand 17 is an excellent example of when NOT to support partners 1H opening.

East opens 1H and West supports bidding 2H.  East with a good hand raises or competes further to 3H.

6 out of 8 E-W pairs went 2 light. Why ?

Unfortunately for E-W trumps break 4-1 and South leads their singleton diamond.

More importantly both E-W hands are flat.  Flat hands have more losers.

If you are in NT, it doesn't matter as much if the H"s and D's break badly, but costly in a suit as E-W found out.

West should bid 1NT not 2H, the 5-3 heart fit is better in NT than in hearts, in this case.

Needless to say, the two Wests' in 1NT made 2NT.  Happy days for them.