On Toernooibase Gerrit Boom shows five examples of a very nice and practical combination idea. It has all the ingredients of becoming a standard combination. Interestingly, in none of the five examples the combination was discovered by the players. Who is / will be the first to apply this idea in practice?
Moreover, Ronald Schalley mentioned that in 2007 he was the trainer of Janes de Vries, and at the time he made Janes aware of the missed combination in the fourth diagram. Unfortunately, 16 years later Janes seems to have forgotten about the combination.
Gerrit Boom showed that the combination can easily occur at different locations on the board.