uses
graphABC;
var
i,j: integer;
begin
setWindowWidth(500);
setWindowHeight(500);
rectangle(30,30,470,470);
for i:=0 to 8 do
begin
line(50,50+i*50,50+8*50,50+i*50);
line(50+i*50,50,50+i*50,50+8*50);
end;
for i:=1 to 8 do
for j:=1 to 8 do
if odd(i+j) then
floodFill(i*50+1,j*50+1,clBlack);
for i:=0 to 7 do
begin
TextOut(70+i*50,453,chr(97+i));
TextOut(37,70+i*50,chr(56-i));
end;
end.