$_=('x'x9 .$/)x9;
substr($_,10*(9-$ARGV[1])+$ARGV[0]-1,1)=0;
for$a(0..8){for$b(0,8,9,10){s/(?<=$a.{$b})x|x(?=.{$b}$a)/$a+1/esg}}
print;
[download]

This is similar to a routine used for pathfinding on game grids. I start at 0. At move 1, here's where I could be, at move 6, here's where I could be, and so on. My routine would be able to avoid barriers in the gameboard and continue to walk around the sides of such barriers. An example barrier of five dashes is added:

$_=('x'x9 .$/)x9;
substr($_,10*(9-$ARGV[1])+$ARGV[0]-1,1)=0;
substr($_,10*3+3,5)='-----';  # extra barrier
for$a(0..8){for$b(0,8,9,10){s/(?<=$a.{$b})x|x(?=.{$b}$a)/$a+1/esg}}
print;
[download]

This produces (with starting 0 at 2,3):

666666789
555556789
444456788
333-----7
222234567
111234567
101234567
111234567
222234567
[download]