Problem: P5-U5-L4
Solution:
 Bag1: P5
  00 00 -- -- -- -- -- 
  00 00 01 02 02 03 -- 
  00 01 01 02 02 03 03 
  -- 01 01 -- 02 03 03 
 Bag2: U5
  00 00 -- -- -- -- -- 
  00 01 01 02 02 02 -- 
  00 00 01 02 04 02 04 
  -- 01 01 -- 04 04 04 
 Bag3: L4
  00 00 -- -- -- -- -- 
  00 01 05 05 05 02 -- 
  00 01 05 02 02 02 04 
  -- 01 01 -- 04 04 04 
#squares: 20
#pieces:
 Bag1: 4
 Bag2: 4
 Bag3: 5
CPU Time: 327.793s
Optimum: yes
Board Size: 30x30
Threads: 16
Choices: 9742920
Conflicts: 5382361
Restarts: 4321
Variables: 55065
Constraints: 187932