L.A. Times Problem No. 169 by Reverend A.C. Pearson. From the Two-Move Chess Problem. White mates in two.
FEN 4K3/1p5B/1P1B3R/P1pkN3/P4P2/2p1p3/2NnP3/3R4 w - - 0 1
Key: N-N6/Ng6
Permits five flight squares for the black king.
End game by Dr. Emanuel Lasker. White to play and draw.
FEN 8/8/3N4/n1krn3/8/6K1/N1P5/1R1r4 w - - 0 1
One difference between problems and end-games is that in the latter a check or capture on the first move is forgivable. The main variation in the above: 1. R-N5ch, KxN; 2. RxRch RxR; 3. N-B3 draws. (i.e., 1. Rb5+ Kxd6 2. Rxd5+ Rxd5 3. Nc3 drawn)