A method of evaluating for the presence of a target polynucleotide in a
sample, using an addressable array of multiple polynucleotide probes
linked to a substrate. The sample is exposed to the array and a set of
polynucleotide target probes, such that target polynucleotide which may
be present will bind to a predetermined feature of the array through
multiple target probes of the set by forming at respective target regions
on a target molecule, simultaneous hybrids with anti-target regions of
the multiple target probes. A binding pattern on the array is observed
and the presence of the target polynucleotide evaluated based on the
observed binding pattern. Kits using such arrays, and methods for
selecting target probes are further provided.