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PostPosted: Wed Dec 27, 2017 10:58 pm 
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Grand Master
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Joined: Thu Apr 24, 2008 4:27 pm
Posts: 760
I'm compiling a list of all of the variants I can find. I am intentionally restricting this list to Sudoku (mostly 9x9 grids) and not including other (non-Sudoku) puzzle types. Obviously, these can be combined, as well (such as a Jigsaw Killer Samurai).

Can anyone add to this list? (I did not include one-off types that have popped up here and there over the years.) Corrections also welcome. I can post examples of these if needed.

    9x9 Extra Constraints
    - Asterisk
    - Calcudoku (Mathdoku, KenKen[tm]; math operation cages)
    - Center Dot
    - Chess Moves
    - Clover
    - Consecutive/Non-consecutive
    - Diagonal (Sudoku-X)
    - Disjoint Groups (Compass; positional colors/groups)
    - Even-Odd
    - Extra Groups (miscellaneous patterns)
    - Girandola
    - Greater-than/Less-than
    - Meandoku (the mean of two adjacent cells marked as >5, <5, =5)
    - Killer (Sumdoku, Samunamupure; addition cages)
    - Touchless Wrapper (Toroidal Anti-Chess)
    - VX (cages with sums to 5 and 10)
    - Windoku (Hyperdoku, NRC)

    Gattai (multiple overlapping grids)
    - Butterfly (4)
    - Clueless Explosion (10)
    - Clueless Special (10)
    - Flower (4)
    - Harakiri (8)
    - Kazaguruma (5; Windmill)
    - Kunoichi (5)
    - Large Gattai (miscellaneous shapes and sizes)
    - Ninja (9)
    - Samurai (5)
    - Sensei-1 (2, 1-nonet overlap)
    - Sensei-2 (2, 2-nonet overlap; Double-Doku, Two-Doku)
    - Sensei-4 (2, 4-nonet overlap)
    - Sensei-misc (2, miscellaneous overlap; Conjoined)
    - Shaolin (25)
    - Shogun (11)
    - Sohei (4; Ring)
    - Sumo (13; Super Samurai)
    - Taiken (21; Circle)
    - TripleDoku-1 (3, 1-nonet overlap)
    - TripleDoku-2 (3, 2-nonet overlap)
    - TripleDoku-4 (3, 4-nonet overlap)
    - TripleDoku-misc (3, miscellaneous overlap)
    - Wing-3 (3, V-shape)
    - Wing-5 (5, V-shape)

    Irregular Nonets
    - Jigsaw
    - No Boxes
    - No Boxes Disjoint Groups (Plum)
    - Toroidal

    Large Grid
    - 12x12
    - 16x16
    - Miscellaneous Sizes (7x7, 8x8, 25x25, etc.)

    Sequential (Relay, Twin)

    Sukaku (Pencil Mark; no givens)


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