solution: |
  "1. Sxc6! [2. Sb4#]
  "Intention : 1. Sdb7 [2. Qf5+
    2. ... gxf5 3. Sc5#]
  But 1. ... Ba3! 
  
  Cook: 1. Sxc6! [2. Sb4#]
  1. ... Rxc6 2. Qd5+
    2. ... Sd4, Bd4 3. Qe4#
  1. ... exd6 2. Sb4+
    2. ... Ke4 3. Qd5, d3, Bc2/f3#
  1. ... exd6 2. Qd5+
    2. ... Sd4, Bd4 3. Sb4#
  1. ... Sxd6 2. Sb4+
    2. ... Ke4 3. Qd5, d3, Bc2/f3#
  1. ... Sxd6 2. Qd5+
    2. ... Bd4 3. Se5/b4, Qxd4#
  1. ... Bc3 2. Qd5+
    2. ... Sd4 3. Se5, Qe4#
    2. ... Bd4 3. Se5/b4, Qe4#
  1. ... Bc3 2. Qd4+
    2. ... Sxd4 3. Se5#
    2. ... Bxd4 3. Sb4#
  
  Cook: 1. Se4! [2. Sf2#]
  1. ... Rf8 2. Qd5+
    2. ... cxd5, Sd4, Bd4 3. Sc5#"