partial3.cnf

p cnf 25 55
c At most one vertex at each position
-1 -2 0
-1 -3 0
-1 -4 0
-1 -5 0
-2 -3 0
-2 -4 0
-2 -5 0
-3 -4 0
-3 -5 0
-4 -5 0
-6 -7 0
-6 -8 0
-6 -9 0
-6 -10 0
-7 -8 0
-7 -9 0
-7 -10 0
-8 -9 0
-8 -10 0
-9 -10 0
-11 -12 0
-11 -13 0
-11 -14 0
-11 -15 0
-12 -13 0
-12 -14 0
-12 -15 0
-13 -14 0
-13 -15 0
-14 -15 0
-16 -17 0
-16 -18 0
-16 -19 0
-16 -20 0
-17 -18 0
-17 -19 0
-17 -20 0
-18 -19 0
-18 -20 0
-19 -20 0
-21 -22 0
-21 -23 0
-21 -24 0
-21 -25 0
-22 -23 0
-22 -24 0
-22 -25 0
-23 -24 0
-23 -25 0
-24 -25 0
c At least one edge at each position
1 2 3 4 5 0
6 7 8 9 10 0
11 12 13 14 15 0
16 17 18 19 20 0
21 22 23 24 25 0