Problem: P5-I5-N4
Solution:
 Bag1: P5
  -- 03 
  03 03 
  03 03 
  02 02 
  02 02 
  02 01 
  01 01 
  01 01 
  00 00 
  00 00 
  00 -- 
 Bag2: I5
  -- 05 
  02 05 
  02 05 
  02 05 
  02 05 
  02 04 
  00 04 
  00 04 
  00 04 
  00 04 
  00 -- 
 Bag3: N4
  -- 03 
  03 03 
  03 08 
  08 08 
  08 07 
  07 07 
  07 06 
  06 06 
  06 00 
  00 00 
  00 -- 
#squares: 20
#pieces:
 Bag1: 4
 Bag2: 4
 Bag3: 5
CPU Time: 70.359s
Optimum: yes
Board Size: 30x30
Threads: 16
Choices: 3512117
Conflicts: 1465516
Restarts: 1311
Variables: 41139
Constraints: 139856