Since... 1994!

Octuple Problem 1: Mate in 2 moves

(White: Kb4, Qb1, Nb3, Bd8, Bg8, c5, d6, f6, g3, g6, h3. Black: Ke5.)

White to move and mate in 2

Solution:

With white king in ...

(a) ... b4: 1. Nd2! Kd4 2. Qe4#

(b) ... b5: 1. Bd5! Kxd5 2. Qf5#

(c) ... b7: 1. c6! Kxd6 2. Bc7#

(d) ... c8: 1. Be6! Kxe6 2. Qe4#

(e) ... e2: 1. Qf1! Ke4 2. Qf4#

(f) ... f2: 1. g4! Kf4 2. Qf5#

(g) ... h4: 1. Ba5! Kxf6 2. Bc3#

(h) ... h7: 1. Qh1! Kf5 2. Qd5#