This is heavier, but it works : White : Kc8 Bd7 Sf7g6 Pf5b2g2 Black : Kg4 Qg3 Rh5h3 Ba8h2 Sf6b5…
George's version is more economical, but the attempt was lost. Анатолий Стёпочкин.
Never mind, was focusing only on the 1-move setplay.
But the try is missing in this setting.
Joost, you may - easily - have switchbacks with your idea : White : Ke8 Sd4 Pg6b2 Black : Kg8…
On the diagonal it can be done more economical, but the white switchback is missing. W: Ke8 Sf5 Pb2 Pg5…
Although it may be possible to achieve more than 5 Queen Schnoebelens in a Masand proof game, having spent several…
But if the very last promotion is a Rook, then we have a unique sequence: 10.Kxg1 Bg4 11.fxg8=Q [g4=w][a2=b]+ Kxg8…
This last version quickly demolished when I verified the last 5 moves: 10.Kxg1 dxc2 11.Sd2 Bg4 12.Sb1 cxb1=S 13.Rxb1 Bxd1…
Looks like multicolored fireworks. What about two more Q promotions? 12.Be2 dxe2 13.Sc3 exd1=Q [a1,c2=b][d6,h5=w]+ 14.Sxd1 cxd1=Q [a1=w][d6,h5=b]+ 15.Rxd1. The…