Inspired by the work of Ladislav Prokes, Noam Elkies created a different windmill study by moving the black pawn from d7 to h5 and removing the pawn on g7 from the original work and spinning the queen in two directions:
1.f4+ Kg4 2.Qg3+ Kf5 3.Qg5+ Ke4 4.Qxe5+ Kf3 5.Qe3+ Kg4 6.Qg3+ Kf5 7.Qxd3+! Preparing to spin the windmill the other way.
7...Kg4 [After 7...Kxf4 White wins with 8.Qg3+ (Or 8.Qe3+ Kg4 9.Qg3+ Kf5 10.Qf3++- ) 8...Ke4 9.Qe3+ Kxd5 10.Qb3++- ; 7...Kf6 8.Qc3+ transposes to the main line two moves early.]
8.Qg3+ Kf5 9.Qh3+! Ke4 [9...Kf6 10.Qc3+ Kf5 (10...e5 11.Qxe5# ) 11.Qe5+ transposes to the main line.]
10.Qe3+ Kf5 [10...Kxd5 11.Qb3++- ]
11.Qe5+ Kg4 12.Qg5+ Kf3 13.Qg2+! Kxf4 14.Qg3+ Ke4 [14...Kf5 15.Qf3++- ]
15.Qe3+ Kxd5 16.Qb3+ wins *