Some of the individual section of the puzzle are nearing completion. Note the use of other puzzle boxes to keep the different coloured pieces separate, but still spread out. This is particularly useful when doing a large puzzle or when space is limited. Identifying The Correct Piece. A well trained eye will look for a combination of colour, markings and shape of the required piece.
Colour combined with lines or other markings are the easiest to match up.
Once you have completed these sections, and are left with many pieces which are virtually indistinguishable by colour or markings, then shape plays a more important role. 3 knobs 1 holes 4 knobs 0 holes Oblong or square. By this, I am referring to the shape of the main body of the puzzle piece excluding the knobs. Some manufacturers have pieces which are all 'square', others will have a mixture. Shape of knob or hole - see examples above.