n=10;
m=10;
q=1;
chessboard=[|1,1,1,1,1,1,1,1,1,1|
1,0,0,0,0,0,1,0,0,0|
1,0,1,1,1,0,1,1,1,1|
1,0,1,0,1,0,1,0,1,0|
1,0,1,1,1,0,1,0,1,0|
1,0,1,0,1,0,1,0,1,0|
1,0,1,0,1,1,1,0,1,0|
1,0,1,0,1,0,1,1,1,0|
1,0,1,0,1,0,1,0,1,0|
1,1,1,0,1,1,1,1,1,1|];
location=[|6,7,4,1,4,7|];