Funky Chess Board (WA)

I am getting partial marks in this problem , any hint what am i missing . Any edge case ?

Here is my code : (backtracking)

@shivampandey9599
bro

the problem that is happening here is that u are removing the visited index from the set by erasing it
but still u use backtrack in that backtrack u need to put that set of coordinates back again

like it means u can visit again

try adding those coordinates again when u do the backtrack condition

my version of the code

but i really like the way u have utilised sets