v8.rexx
Rexx dilinde
/* 8 Queens */
m.=1
n=0
i=1
loop: do d=1 to i-1
j=i-d
if m.i=m.j then signal incm
if abs(m.i-m.j)=d then signal incm
end
inci: i=i+1
if i<9 then signal loop
n=n+1
say n': a'm.1' b'm.2' c'm.3' d'm.4' e'm.5' f'm.6' g'm.7' h'm.8
signal deci
incm: m.i=m.i+1
if m.i<9 then signal loop
m.i=1
deci: i=i-1
if i>0 then signal incm