From the Amberchess blindfold comp. I couldn’t work it out – and I could see!
And a nice little immortal game by Kasparov here.
1. Bg5 (threatening 2. Rd6#)
1. … Rd7 2. Rxd7 Kxd7 3. e6+ Ke8 4 Rd2 (threatening Rd8#)
and I see I got it right. Took about 15 minutes though which would have probably run me out of time – not to mention I knew there was something to look for and could see!