true
0: --7-3----5--6---------8--4----1---2-
1: -2---------4---8-7-----3---5--0--6--
2: -1-----5--7---3---6-4----------8--0-
3: 8---0---------2-4------1--6--5-----7
4: -----8-----1-7--3---2----0--6---5---
5: ---6---2-0---------8-7-----1-3--4---
6: ---5--7-8---0-----2-------3-4----1--
7: --0---6---2--4---1---5--8----------3
8: 3----4--6------1---5--0-7------2****
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(0,3) (4,8) (6,7) (2,5) 
(6,8) (0,5) (2,7) (1,4) 
(0,6) (4,7) (2,3) (1,8) 
(3,4) (1,7) (2,6) (5,8) 
(2,4) (5,7) (0,8) (1,3) 
(7,8) (0,4) (3,6) (1,5) 
(4,6) (3,5) (0,1) (2,8) 
(4,5) (1,6) (0,2) (3,7) 
nodes: 25971   cpu: 204126