L.A. Times Problem No. 168 by S. Mlotkowski, Camden, N.J. First publication. White mates in two.
FEN 4Kb1B/4NB1p/4N2k/8/7r/5Q1b/6r1/4q3 w - - 0 1
Key: Q-N4/Qg4
Endgame by Henri Rinck. White to play and win. White can't stop the black pawn from queening so other measures must be taken as follows: 1. N-N4 P-K8(Q); 2. B-Q4ch (if QxB; 3.N-B6ch wins; 1. Nb4 d1=Q 2. Bd4+ Qxd4 3. Nc6+) K-R; 3. N-R6! (if Q-B7ch; 4. N-B7ch wins) QxB; 4. N-B7ch K-R2; 5. N-N5ch wins.
FEN 2K5/k7/8/4B3/5p2/7P/2Np4/8 w - - 0 1