Pillsbury`s Mate is a common method of checkmating and is named for Harry Nelson Pillsbury. It works by attacking the king with the rook while the bishop is cutting off the king. It is very similar to Morphy's Mate, in fact in some ways they are interchangeable, the main difference is that in Pillsbury's mate, the bishop could be on h6.
Convert all the letters in the checkmate into numbers A=1, B=2... Y=25, Z=26 etc..
PILLSBURYSMATE = ABCDEFGHIJKLMN
The cache can be found at:-
N55 (C-D)N. (I-H)(G-H)(I-J)
W001 (D-B)L. (K-D)L(J-A)