L.A. Times Problem No. 75 by T.B. Rowland, from the Problem Art. White mates in two.
FEN rN1K3k/7B/8/8/8/2N5/PR5R/B6r w - - 0 1
Key: N-N/Nb1
14 discoveries (maximum) by the rook.
L.A. Times Problem No. 76 by H.S. Pike, Long Beach, California. First Publication. White mates in three.
FEN 4Nb2/6p1/R2pk1Pp/1bB1Np2/5KP1/2P5/8/8 w - - 0 1
Key: 1. B-B2/Bf2
If K-Q4; 2. N-QB7 (short mate). If K-K2; 2. B-R4ch. etc. If BxR 2. N-B7ch, etc. If BxN; 2. PxPch, etc. If P any; 2. N-B7ch, etc.