White sacrifices his Rook

Page 57, "The World of Chess" white mate in 5 moves.

mate em 5
Scorpio 00:08:20
Super 9 06:51:00

mate em 4 
Scorpio 00:00:00 - imediato
Super 9 00:01:36

mate em 6
Scorpio 00:00:54
Super 9 00:35:15

mate em 5
Scorpio 00:01:37
Super 9 00:00:01