It’s time for the Labourdonnais Challenge. The greatest player of the early 19th century was once challenged to solve this puzzle—a mate in 6—in less than an hour. He did! So, now you can match wits with the champ. BTW, back then it was ok to allow checks on the first move of composed problems.
1.Rb6+ Kd8 2.Qe8+ Kxe8 3.Rxg6 Kf8 4.Bxe7+ Kxe7 5.Re6+ Kf8 6.Re8#