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  2. Combination puzzle - Wikipedia

    en.wikipedia.org/wiki/Combination_puzzle

    A traditional sliding piece puzzle. There are now endless variations of this original puzzle implemented as computer games. Geranium Piece configuration: 5 intersecting circular rotational groups of oddly shaped pieces. A rotating piece puzzle. Some rank its difficulty very high compared to complex 3D puzzles. [16]

  3. List of impossible puzzles - Wikipedia

    en.wikipedia.org/wiki/List_of_impossible_puzzles

    This is a list of puzzles that cannot be solved. An impossible puzzle is a puzzle that cannot be resolved, either due to lack of sufficient information, or any number of logical impossibilities. Kookrooster maken 23; 15 Puzzle – Slide fifteen numbered tiles into numerical order. It is impossible to solve in half of the starting positions.

  4. Five-room puzzle - Wikipedia

    en.wikipedia.org/wiki/Five-room_puzzle

    The puzzle consists of five rooms, which can be thought of as being connected by doorways. The five-room puzzle is a classical, [1] popular puzzle involving a large rectangle divided into five "rooms". The objective of the puzzle is to cross each "wall" of the diagram with a continuous line only once. [2]

  5. Speedcubing - Wikipedia

    en.wikipedia.org/wiki/Speedcubing

    In 3×3×3 blindfolded and 3×3×3 fewest moves challenges, either a straight mean of 3 or the best of 3 is used, while 4×4×4 blindfolded, 5×5×5 blindfolded, and multiple blindfolded challenges are ranked using the best of 1, 2 or 3, depending on the competition. When a round begins, competitors turn in the puzzle they will use.

  6. Play free online Puzzle games and chat with others in real-time and with NO downloads and NOTHING to install.

  7. Sliding puzzle - Wikipedia

    en.wikipedia.org/wiki/Sliding_puzzle

    As a famous example of the sliding puzzle, it can be proved that the 15 puzzle can be represented by the alternating group, [2] because the combinations of the 15 puzzle can be generated by 3-cycles. In fact, any n × m {\displaystyle n\times m} sliding puzzle with square tiles of equal size can be represented by A n m − 1 {\displaystyle A ...

  8. Burr puzzle - Wikipedia

    en.wikipedia.org/wiki/Burr_puzzle

    An assembled six-piece burr. The six-piece burr, also called "Puzzle Knot" or "Chinese Cross", is the most well-known and presumably the oldest of the burr puzzles. This is actually a family of puzzles, all sharing the same finished shape and basic shape of the pieces. The earliest US patent for a puzzle of this kind dates back to 1917. [8]

  9. Soma cube - Wikipedia

    en.wikipedia.org/wiki/Soma_cube

    Similar to Soma cube is the 3D pentomino puzzle, which can fill boxes of 2×3×10, 2×5×6 and 3×4×5 units. The Bedlam cube is a 4×4×4 sided cube puzzle consisting of twelve pentacubes and one tetracube. The Diabolical cube is a puzzle of six polycubes that can be assembled together to form a single 3×3×3 cube.