B|B|B|B| | | |X| | | |B|B|B|B
 |S|C|S| |S|S|S|S|S| |S|C|S| 
 |S|C|S|B|C|C|S|C|C|B|S|C|S| 
3|S|S|S|B|S|S|S|S|S|B|S|S|S|3
 |S|C|S|4| | |4| | |4|S|C|S| 
 |S|C|S|B|S|S|S|S|S|B|S|C|S| 
B|B|T|B|B|C|C|S|C|C|B|B|T|B|B
 |S|C|S|B|S|S|S|S|S|B|S|C|S| 
 |S|C|S|4| | |4| | |4|S|C|S| 
3|S|S|S|B|S|S|S|S|S|B|S|S|S|3
 |S|C|S|B|C|C|S|C|C|B|S|C|S| 
 |S|C|S| |S|S|S|S|S| |S|C|S| 
B|B|B|B| | | |Y| | | |B|B|B|B