For people with love and passion for puzzles

Classification of Puzzles

The classification for Puzzles as presented below is courtesy ofThe Puzzle Museum The 14 main classes are as following:
1. Ambiguous Pictures & Puzzling Objects [AMB]
In which something appears impossible or ambiguous.
2. Assembly Puzzles (non-interlocking) [ASS]
Require the arrangement of separate pieces to make specific shapes without regard to the sequence of that placing, they may clip together but do not interlock in 3D.  Some have a container and are posed as packing problems.
3. Dexterity Puzzles [DEX]
Require the use of manual dexterity or other physical skills in their solution.
4. Folding & Hinged Puzzles [FOL]
Have parts that are joined together and usually do not come apart. They are solved by hinging, flexing, or folding.
5. Interlocking Puzzles [INT]
Interlock in three dimensions, i.e. one or more pieces hold the rest together, or the pieces are mutually self-sustaining.  Many clip-together puzzles are "non-interlocking".
6. Jigsaw Puzzles [JIG]
Are made as if cut or stamped into pieces from a single complete object, and the principle objective is to restore them to their unique original form.
7. Jugs & Vessels [JUG]
Have a mechanical puzzle or trick in their construction that affects the filling, pouring or drinking therefrom.
8. Pattern Puzzles [PAT]
Require the placing or arrangement of separate pieces of a similar nature to complete surface patterns according to defined rules. The pattern required may be the matching of edges of squares, faces of cubes, etc. The pattern may be color, texture, shape, etc. Where the pattern is due to differences in shape they must be sufficiently minor not to obscure the similarity of the pieces.
9. Opening Puzzles [OPN]
Are puzzles in which the principle object is to open it, close it, undo it, remove something from it, or otherwise get it to work. They usually comprise a single object or associated parts such as a box with its lid, a padlock and its hasp, or a nut & bolt. The mechanism of the puzzle is not usually apparent, nor do they involve general assembly or disassembly of parts that interlock in 3D.
10. Route finding Puzzles [RTF]
Require the solver to find either any path, or a specific path as defined by certain rules.
11. Sequential Movement Puzzles [SEQ]
Are those that can be solved only by moves which can be seen to be dependant on previously made moves.
12. Tanglement Puzzles [TNG]
Have parts that must be linked or unlinked. The linked parts, which may be flexible, have significant freedom of movement in relation to each other, unlike the parts of an interlocking puzzle.
13. Other Types of Mechanical Puzzles & Objects [OTH]
This group is for puzzle objects that do not easily fall into the above categories and cannot be categorized into sufficiently large groups to warrant their own major class. Included in this group are Balancing, Measuring, Cutting, Math, Logic, Trick, Mystery, & Theoretical puzzles. Also provision is made for puzzles pending classification.
14. Non-puzzle but related Ephemera [EPH]
Has been included as most puzzle collections include related ephemera which, whilst not strictly puzzles, need to be classified as part of the collection.