solution of monday exercice

Larsen,Bent - Spassky,Boris Vasily
URS vs World match Belgrade (2.1), 29.03.1970

14...Rh1!!  15.Rxh1
[15.Kf1 Rxg1+ 16.Kxg1 Qh4-+ ] 15...g2 16.Rf1?(16 Rg1 is better but lose also try to find why!)
 16...Qh4+! mate in 4 17.Kd1 gxf1Q+ [17...gxf1Q+ 18.Bxf1 Bxg4+ 19.Kc1 (19.Be2 Qh1#) 19...Qe1+ 20.Qd1™ Qxd1#]  0-1
0ne of the classical Mona Lisa Chess!