Some athletes live permanently at high altitudes so that the extra red blood cells give them a competitive edge when competing at near-sea-level events. That's how partner and I felt when playing at the 0-750 gold pairs 2-session event at the OKC regional. At our club game, the average masterpoint holding is about 1500 and all six regular pairs are quite strong. The regional pairs event was a comparatively easier field.
In the first session, we had a 68% game. If it wasn't for this board, we'd have broken 70% and probably got our names in the bulletin. Third hand, north opens 1D and my partner had a decision to make. What would you bid?
My partner selected 1S. As it turns out, 1NT might have worked out better. I showed a limit raise with 2D (see below). He had, of course, over-called a 4-card suit but was afraid of hearts at NT. So, he bid 3D. I wasn't sure what that meant, so I simply corrected to 3S and we played in 4S. Partner made it, but the field was in 3NT making 10 tricks. 4S was worth only 2 out of 11 match-points.
Yes, she really opened 1D with that hand. It was alerted as "could be short".