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  Solution 4
  
  
White: a2-e6;xb3,c4,d5
White could not attack Ge4 right away, because Black was 
  holding the last move and, more over, could capture the piece on e7. 
  Through 1.a2-e6;x White recycles pieces and lines up 3 pieces on the 
  e1-e9 diagonal at the same time. 
  Black has 2 options now. He can play 1
b6-g4 and leave himself a 
  sure way to recycle pieces on the c1-c7 line with his next move. But that is 
  no solution because White will put a piece on e8. Black's 2
c7-c4;x 
  will make that spot c6 becomes vacant and White has a winner with 3.i2-c6;xGe4.
  But the second option, 1
a3-f7;x, isn't any better, because the 
  piece on d6 was Black's defense. So, White plays 2.e8 and there's 
  nothing Black can do: 2
f8-d8 will be followed by 3.c7-e7 
  and White captures Ge4 with his next move.