Christmas Puzzle Contest

(1) Muller,Richard Rochade 1985 1.a4! [1.e4 d6 2.Ba6 Bf5 3.Bxb7 Bxe4 4.Bxa8 Bd5 5.Bb7 Bxa2 6.Ba6 Be6 7.Bf1 Bc8 ; 1.e3 d6 2.Qf3 Be6 3.Qxb7 Bxa2 4.Qxa8 ] 1...d6 2.a5 Bg4 3.a6 Bxe2 4.axb7 Bxd1! [4...Bg4 5.bxa8Q Bh3 6.Qb7 Bg4 7.Qc8 Bxc8 ; 4...Bf3 5.bxa8Q Bxa8 6.Qe2 Bb7 7.Qd1 Bc8 ] 5.bxa8Q Bg4 6.Qf3 Bc8 7.Qd1 How did this position arise after White's 7th move? * Note that you can click on the notation to follow the moves

(2) Gruber,Hans Schach-Echo, 1983 1.f3 c6 2.Kf2 Qb6+ 3.Kg3 Qxg1 4.h3 Qxf1 5.Kh2 Qe1 6.Rf1 Qxd2 7.Kg1 Qa5 8.Nd2 Qd8 Position after Black's 8th move *

(3) Pauly,W - Mate in two 1913 1.d8Q+! Ke6 [1...Kc6 2.Qd7# ] 2.Qe7# *

(4) Pauly,W - Mate in two 1913 1.c8R Ke6 2.Rc6# *

(5) Pauly,W - Mate in two 1913 1.e8B Ke6 2.Rh6# *

(6) Pauly,W - Mate in two 1913 1.b8N Ke6 2.Rh6# *