Gypsy: Nifty deflection <28...Rxe4!> finishes the game. White has no less than ten plausible replies, none adequate.I. Objectively best is <29.Rf1> where after <29...Qd5 or Qc4> Black is up only two pawns, better position, and attack.
II. In a time trouble, the trickiest play may be <29.Re3?! Nf2+ 30.Kg1 Qd1+ 31.Kxf2 fxe3+ 32.Bxe3 Rae8 ...> with overwhelming position for Black.
III. One of the two most thematic replies is <29.Rxe4? Qa1+>, where <Nf2#> can be only postponed but not stoped.
IV. Of course, the other most thematic reply is <29.Bxd4? Rxe1+ 30.Bg1 Nf2#>.
V. <29.Rg1? Nf2#>
VI. <29.Re2 Nf2+ 30.Kg1 Qd1+ 31.Kxf2 Qxe2+ ...>
VII. <29.Rd1 Nf2+ 30.Kg1 Qxd1+ 31.Kxf2 Qe2+ ...>
VIII. A trick play is <29.Qa5?! Qxb6! 30.Rxb6 Rxe1+ ...>
IX. <29.Ba5 Nf2+ 30.Kg1 Nh3+ 31.Kh1> allows either the usual Philidor legacy or <31...Rxe1+ 31.Bxe1 Qg1#>.
X. And the game finish <29.Rb1 Nf2+ 30.Kg1 Nd1!> would have continued <31.Kf1 Qc4+ ...> if White did not call it quits.