48 ( +1 | -1 ) Afterboth knights fork a rook, white's will be able to re-emerge by Be3 and Bxa7, whereas Black's is trapped. If black tries to prevent white from retrieving his knight from a8, then white gets a winning attack.
For example: 10... Nc2+ 11. Kd1 Nxa1 12. Nc7+ Kd7 (Kd8 is similar) 13. Nxa8 e5 14. Be3 b6 (otherwise white will play Bxa7 and Nb6-c4/a4) 15. Bb5+ Black must play 15... Kc8 if he wants to regain the knight (otherwise White just plays Kd2 and Rc1) but then white has: 16. Ke2 Kb7 (16... Nc2 17. Rc1) 17. Rc1! Bc5 (17... Bd6 18. Bc6+) 18. Nc7! Kxc7 19. b4 and wins.
66 ( +1 | -1 ) thanks artifix! i went over the game and see now how white has the advantage.
i played an over the board tournament game yesterday using c3 sicilian, but lost. this game differed from the above variation with 4...Nc6 instead of cxd4
i am white. it went>>> e4, c5; c3, d5; exd5, Qxd5; d4, c5; dxc5, Nf6 and i didn't know a really good move at this point. i think what i played.... QxQ isn't so good for me. he played NxQ and i think i should have played Bc4 to get rid of the knight because it was so strong there on d5. but i played dumber moves (like very next move Na3? and later a 0-0-0? when the entire queenside was open for my opponent's attacking) and lost badly. :_(