Pinion

White to play and mate in three moves
 

a

b

c

d

e

f

g

h

  

8

 8

7

 7

6

 6

5

 5

4

 4

3

 3

2

 2

1

 1
 

a

b

c

d

e

f

g

h

  

Solution

  1. Kxf6          b5
  2. Qb8+        Rd8
  3. Qxd8# (exd8=Q#, exd8=R#)
  1. ...               Rd8
  2. exd8=Q+ (=R+)  Kxd8
  3. Qb8# 
  1. ...               Rxd6+
  2. Qxd6         b5
  3. Qb8# (Qd7#, Qd8#)
  1. ...               Rxd6+
  2. Qxd6         bxc6
  3. Qxc6# ( Qd8#)
  1. ...               Rc7
  2. Qxc7         b5
  3. Qd8# (Qb8#, Qd7#, Qc8#)

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