* *
if(x<5) return 0; if(x!=oldx&&y!=oldy) {
if((x-oldx)==2&&(y-oldy)==2) {i=oldx+1;j=oldy+1;}
else if((x-oldx)==2&&(oldy-y)==2) {i=oldx+1;j=oldy-1;}
else if((oldx-x)==2&&(y-oldy)==2) {i=oldx-1;j=oldy+1;}
else if((oldx-x)==2&&(oldy-y)==2) {i=oldx-1;j=oldy-1;} else return 0;
if(board[i][j]!=0) return 0; }
else return 0; break; } return 1; }
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