Yes, you can cut a 1" x 6" board with the RYOBI TS1345L 14 Amp 10 in. Compound Miter Saw. The saw has a cutting capacity of up to 12 inches wide at 90 degrees, which is more than sufficient for a 1" x 6" board (which typically measures around 5.5 inches wide). You should be able to make the cut easily, as long as the material fits within the saw’s maximum cutting capacity.