Problem: N4-P5
Solution:
 Bag1: N4
  00 00 01 01 02 02 03 03 04 04 -- 
  -- 00 00 01 01 02 02 03 03 04 04 
 Bag2: P5
  00 00 00 05 05 06 06 06 07 07 -- 
  -- 00 00 05 05 05 06 06 07 07 07 
#squares: 20
#pieces:
 Bag1: 5
 Bag2: 4
CPU Time: 7758.122s
Optimum: yes
Board Size: 30x30
Threads: 16
Choices: 287256060
Conflicts: 137145110
Restarts: 65018
Variables: 31489
Constraints: 107776