easy

Surely 1.Rg3+ Kh2 2.Nf1++

is far better!

Cool puzzle.  Even though it is a fictional postition, I guess having the bishops on white and black would make more sense.  I kind of got stuck on the for a few seconds.

demuxer: although it looks like repetition, chessboard isn't exactly same because there is always one piece missing :o)

quite clever..

demuxer, This is not repetition. The rook is going to new square each time. This is called the wind mill tactic

easy!

hey man, thats on the edge of breaking the rule for the 3rd repetition,