CHESS SOLUTION:
1...Qxf1 + ! ; 2 Kxf1, Rxf2 + Now: A: 3 Ke1, Rxg2; 4 Kf1, Raf2 + ; 5 Ke1, Bd2 + wins B: 3 Kg1 (the game continuation) Rxg2 + ; 4 Kh1, Rgc2; 5 0 – 1 White must give up his queen to avoid mate
1...Qxf1 + ! ; 2 Kxf1, Rxf2 + Now: A: 3 Ke1, Rxg2; 4 Kf1, Raf2 + ; 5 Ke1, Bd2 + wins B: 3 Kg1 (the game continuation) Rxg2 + ; 4 Kh1, Rgc2; 5 0 – 1 White must give up his queen to avoid mate