A rare Win against All Others

This is a strange hand, where the analysis shows that I win against all 70 other players. I play Acol for a relaxed experience at the moment. After the 1♥ intervention, I can hardly continue with the normal 1NT bid which would show 15-17 points and a balanced hand. So, I raised partners diamonds. 

Lia tells me that my system allows the 1NT bid even without a stopper. But it also tells me that my partner would have fixed to 2♦. I am a bit unsure about the philosophy here. If my 1NT does not promise a stopper and my partner has one, why not pass?

The 2♦ was made. My direct opponent in the ranked ladder failed to make it, after opening the same way in Acol. In fact, we both could have made an overtrick. The hand is not easy. But if you use your trumps to ruff, you cannot go down.

On most other tables, the hand was opened 1NT. East then jumps in after two passes with 2♣ showing a two-suiter in majors. They ended in 2♥, which were one down or made for +110 or +100 instead of +90. The trick to beat the contract for down 2 is to draw the trump with ♠A followed by a small trump. That seems to be difficult to find. 

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