Schwarz am zug - mate in 4

Zorigt Bayaraa vs Vinay Bhat, Tulsa, 2008

[FEN "7r/1p3bk1/1Pp2p2/3p2p1/3P1nq1/1QPNR1P1/5P2/5BK1 b - - 0 1 KQkq - 0 1"] [NAVIGATION "0"] [CUSTOM_MOVE "1"] 1... Qh5 2.Bg2 Qh2+ 3. Kf1 Qh1+ 4.Bxh1 Rxh1#