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The Problemist, 1990 (after Walter Grimshaw, Hereford Chess Association Solving Ty., 1885)

#3

1.Bg3!  ()

1...Ka5 2.b3 fxg3 3.Ra4#
1...a5  2.e4 fxg3 3.e5

One of the first, if not the first, of my ‘versions’ of old problems. Grimshaw’s problem was a mate in 4, with this mate in 3 idea inside it. I thought the idea of the illegal e.p. capture deserved an outing, and so constructed this simple #3.