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  2. David Smith (amateur mathematician) - Wikipedia

    en.wikipedia.org/wiki/David_Smith_(amateur...

    Smith discovered a 13-sided polygon in November 2022 whilst using a software package called PolyForm Puzzle Solver to experiment with different shapes. [4] After further experimentation using cardboard cut-outs, he realised that the shape appeared to tessellate but seemingly without ever achieving a regular pattern.

  3. Sliding puzzle - Wikipedia

    en.wikipedia.org/wiki/Sliding_puzzle

    A sliding puzzle, sliding block puzzle, or sliding tile puzzle is a combination puzzle that challenges a player to slide (frequently flat) pieces along certain routes (usually on a board) to establish a certain end-configuration. The pieces to be moved may consist of simple shapes, or they may be imprinted with colours, patterns, sections of a ...

  4. 15 puzzle - Wikipedia

    en.wikipedia.org/wiki/15_puzzle

    Named after the number of tiles in the frame, the 15 puzzle may also be called a "16 puzzle", alluding to its total tile capacity. Similar names are used for different sized variants of the 15 puzzle, such as the 8 puzzle, which has 8 tiles in a 3×3 frame. The n puzzle is a classical problem for modeling algorithms involving heuristics.

  5. Edge-matching puzzle - Wikipedia

    en.wikipedia.org/wiki/Edge-matching_puzzle

    An edge-matching puzzle is a type of tiling puzzle involving tiling an area with (typically regular) polygons whose edges are distinguished with colours or patterns, in such a way that the edges of adjacent tiles match. Edge-matching puzzles are known to be NP-complete, and adaptable for conversion to and from equivalent jigsaw puzzles and ...

  6. Eternity puzzle - Wikipedia

    en.wikipedia.org/wiki/Eternity_puzzle

    An empty Eternity board. The Eternity puzzle is a tiling puzzle created by Christopher Monckton and launched by the Ertl Company in June 1999. It was marketed as being practically unsolvable, with a £1 million prize on offer for whoever could solve it within four years.

  7. Three-dimensional edge-matching puzzle - Wikipedia

    en.wikipedia.org/wiki/Three-dimensional_edge...

    A three-dimensional edge-matching puzzle is a type of edge-matching puzzle or tiling puzzle involving tiling a three-dimensional area with (typically regular) polygonal pieces whose edges are distinguished with colors or patterns, in such a way that the edges of adjacent pieces match.

  8. Eternity II puzzle - Wikipedia

    en.wikipedia.org/wiki/Eternity_II_Puzzle

    Clue Puzzle 1 is a 36-piece square (6 × 6) puzzle and Clue Puzzle 2 is a 72-piece rectangular (12 × 6) puzzle. Two additional clue puzzles of the same dimensions were made available in 2008: the 36-piece Clue Puzzle 3 and the 72-piece Clue Puzzle 4. The rule book states that the puzzle can be solved without using the hints. [3]

  9. Threes - Wikipedia

    en.wikipedia.org/wiki/Threes

    The official game trailer, depicting standard sliding tile gameplay. The player slides numbered tiles on a four-by-four grid [2] to combine addends and multiples of three. [3] For example, ones and twos merge to become a single "three" tile, two threes merge into "six", and two sixes merge into "12".