CHECKER	2	4
[0,0,1,0,-1,0]	[1,0,2,0,0,1]	[2,0,3,0,1,1]	[3,0,2,1,4,1]	
[0,1,1,1,-1,1]	[1,1,2,1,0,2]	[2,1,3,1,1,2]	[3,1,2,2,4,2]