Dallas FIDE Open 2013 Rd9-IM Hambleton(CAN)

Rd9
Thanks to Hugh Brodie for posting this game on Chesstalk Dallas 2013. 
IM Hambleton finishes the tournament with 5.5/9. Hambleton ground out a tough win after Troff took some liberties with his king early in the game.

Troff,Kayden (2407) - Hambleton,Aman (2463) 
Benko 5.f3[A57]
UTD Turner GM Invitational 2013 Richardson (9), 13.03.2013

Position 1
Black is well placed but how to exploit this is not so simple. What do you recommend for black?

Black to Play

33.Kg2

Position 2

The R-R ending looks bleak. Assess the move 46.Rb3

• Win for black
• Draw

(I think it's a draw but I'm not 100% sure.)

White to Play

45...b2