/tmp/clpq

yes
| ?- [library('clpqr/examples/squares')].
{consulting /freyung/christian/sicstus2.1.9.clp/library/clpqr/examples/squares.pl...}
{Warning: [X1,X2,X3,X4,X5,X6,X7,X8,X9] - singleton variables in rectangle/2 in lines 1-40}
{/freyung/christian/sicstus2.1.9.clp/library/clpqr/examples/squares.pl consulted, 30 msec 2928 bytes}

yes
| ?- time(rectangle(A,Rs)).
%%% Timing 00:01:10.950    70.950

A = 33/32,
Rs = [15/32,9/16,1/4,7/32,1/8,7/16,1/32,5/16,9/32] ? ;
%%% Timing 00:00:08.730     8.730

A = 69/61,
Rs = [33/61,36/61,28/61,5/61,2/61,9/61,25/61,7/61,16/61] ? 

yes
| ?- ^D