My interpretation: X = I think is with spades,force 4NT = over the 4 SP,BW 5♣ = 0-3 Aces, A,K-SP and A CL 5♠ = Here is my surprise. I think here, 5 SP is stoped, but Bessis go to 5NT. 5NT = go for king 6♦ =1 king 6♠ = final contract. I don't understood your explanation: 4N = "two places to play", always with both minors unless slam interest 5♣ = preference opposite both minors, NF Thank you.