Last week, I played my first session of bridge in about five years, meaning that I was "rusty," and I was also at a new club with a partner I had just met, who mentioned "Standard American."
Sitting South, neither side vulnerable, and dealing, I had (s) QT94 (h) A7 (d) K764 (c) AJ6. I opened:
1D Pass 1 Heart Pass
1NT Pass 3 Hearts Pass
At this point, I passed, giving my partner credit for something like (s) 53 (h) KQJT32 (d) 93 (c) Q87. That is a six card heart suit, and 6-9 points. Since we would have had 20-23 HCP and only eight hearts between us, I felt that 3 hearts was plenty, perhaps too high, unless he had seven hearts
Partner actually had (s) 53 (h) KQJT3 (d) A93 (c) Q87. He said, "I had an opening hand opposite an opening hand, and you were supposed to bid four hearts with at least three hearts, and 3NT otherwise."
Who was correct under Standard American bidding? (I had taken that sequence to mean an opening hand and 6-7 card suit when made only by the opener (not responder). What do other systems (than Standard American) have to say about this matter?