The late Xavier Parmentier, a very succesful chess teacher, writer, and a leading figure in the French chess community for decades, focused on those lines in his calculation exercices and wrote about them in his book "Les secrets de l'initiative aux échecs" (literally: Secrets of Initiative in Chess), and probably in other works.

He dubbed them "supermarket variations" (les variantes supermarché) : each player grabs what he wants on the shelves without interfering in his opponent's captures.

The late Xavier Parmentier, a very succesful chess teacher, writer, and a leading figure in the French chess community for decades, focused on those lines in his calculation exercices and wrote about them in his book "Les secrets de l'initiative aux échecs" (literally: Secrets of Initiative in Chess), and probably in other works.

He dubbed them "supermarket variations" (les variantes supermarché) : each player grabs what he wants on the shelves without interfering in their opponent's captures.