After a tense battle on the queenside, the game simmered down to a rook ending with black a pawn up. Christiansen made a critical error with 71.Kf2?? allowing Fishbein to either win second pawn with 71
Rxh5 or create two devastating passed pawns with 71
f5! (diagram) Since Christiansen chose the second option, Fishbein sacrificed his extra pawn and the steamrolling pawns became unstoppable. Thus, the champion resigned and may have put an end to his quest for a second consecutive championship. GM Shabalov appears to have the best momentum at this point.
Exciting matchups in Round 7 are: Shabalov-Fishbein, Seirawan-Nakamura, Akobian-Muhammad, Ashley-Watson, Perelshteyn-Battsetseg.
Report by Dr. Daaim Shabazz, The Chess Drum