2♦= forces 2♥
2♥= forced
2♠= 5431 with 5M,4m
2NT= forced bid
3♥= 1534 or 1543
It took us only 6 months to get any use of this convention, after an auction that will be probably duplicated on every table you receive a ♠ lead, capturing the ♠Q, next comes a ♥ to the ♥A on wich West dicards a ♠

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S - N
1NT-2♦*
2♥*-2♠*
2NT*-3♥*
3♠-4♣
4♦-6♦
6♥-pass