-1.f4 a5,h6 2.d3,c3 c6,Kc7 3.Qe3,Qe5 d6,dxe5 4.fxe5,e6 fxe6,Rxf1 5.Ng3,Nxf1 Nb6,Bg6 6.Nd2,Ne4 Bxe4,Bxd3 7.Nxd3,Nc5 Na4,Nxb6
+Ambiguous chess
+https://www.chessvariants.com/mvopponent.dir/ambiguous-chess.html
+Need special highlight square --> similar to enlightened for Dark, in Board.vue
+Also in notation, show only dest square for "opponents ambiguous moves".
+Similar to Marseille-chess, white first move only 1 subTurn, do not choose a square.
+Then black has a free first move, then choose a square, and the process goes on.