I need help understanding a computer suggestion machijv Updated: Sep 3, 2013, 8:21 PM | 2 It is black to play on move 17 and the computer says I made a mistake with 17. ... Bf5. The computer suggests 17. ... PxP 18. NxP Bf5 19.Nf3 . I am wondering why not 19. Nxp+ forking the rook.