See 3 moves ahead from wtharvey.com

Here are some chess problems composed by A. Corrias. White Mates in 3.

Solutions are between the brackets under each puzzle.
Drag your cursor from one bracket to the other.

a)
8/8/3P2R1/8/8/5K1p/8/7k w - - 0 1
[ Rh6 if Kh2 Kf2 ]

b)
8/Q7/6N1/3k2N1/8/8/8/1B5K w - - 0 1
[ Ne4 if Kc6 Bd3 or if Kc4 Qa4+ or if Ke6 Nf6 ]

c)
8/8/6kP/3Q4/2K3P1/8/6P1/8 w - - 0 1
[ g3 if Kxh6 Qf7 or if Kf6 Qd7 ]

d)
2B5/4Q3/8/4N1B1/4k3/8/8/2K5 w - - 0 1
[ Be6 if Kxe5 Qd7 or if Kd4 Qd6+ ]

e)
8/3k4/1K1N1R2/8/8/8/1p6/1B6 w - - 0 1
[ Nc8 if Kxc8 Rd6 or if Kd8 Rf8+ or if Ke8 Kc6 ]

A. Corrias Problems, Part II. White Mates in 3.
a)
8/8/8/2N5/4p3/p7/b1Q5/k5K1 w - - 0 1
[ Na6 if Bd5 Nb4 or if Bb3 Qc1+ ]

b)
8/2Q4K/4k3/3p1p2/8/1B1p4/8/8 w - - 0 1
[ Bd1 if d2 Kg7 or if f4 Bg4+ ]

c)
3K4/8/8/B2pN3/3N1k2/8/8/1Q6 w - - 0 1
[ Qh1 if Kxe5 Qh4 or if Kg3 Ne2+ or if Kg5 Bd2+ ]

d)
K7/7p/Q7/8/6N1/5k2/B3N3/8 w - - 0 1
[ Qh6 if Kxe2 Qe3+ or if Kxg4 Qf4+ or if Kg2 Qh1+ or if Ke4 Ne5 ]

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