Latin Square Family... 

Sudoku 
Regular Sudoku with numbers 
27 domain  3x3 squares 
Books available 

Gurmukhi Sudoku 
Regular Sudoku but with numbers in a writing system that you are less likely to be familiar with 
27 domain  3x3 squares 


DOWdoku 
Day Of Week Sudoku with numbers. The extra domain has the same rules as the columns, rows and so on 
28 domain  3x3 squares + additional domain 
Books available 

Wordoku 
Sudoku with additional domain down which a nineletter word is spelled. This is one of those rare Sudoku puzzles where a knowledge of
the peculiar world of big dictionaries that have all of those obscure words that can be so useful close to the end of a game, can come in handy.
Solve the Sudoku and find the word. 
28 domain  3x3 squares _ additional domain with word 
Books available 

Shatterdoku 
Sudoku with additional domain which is scattered randomly around the board 
28 domain  3x3 squares + nine 'bits'. 
Books available 

Motifdoku 
Regular Sudoku with four additional domains. Each additional domain is a coloured, irregular block arranged symmetrically within the puzzle 
31 domain  3x3 squares + four additional domains 
Books available 

Symdoku 
Regular Sudoku with extra domain, usually (but not always  '5'), symmetrical 
28 domain  3x3 squares + additional domain 
Books available 

Windoku 
Regular Sudoku with four additional domains appearing as 3x3 squares arranged so that it looks like a window. 
31 domain  2 x 3x3 squares 
Books available 

Jigsawdoku 
Sudoku where the usual 3x3 domains are rearranged so that the the puzzle fits together like a jigsaw 
27 domain  irregular shapes 
Books available 

Chaindoku 
Sudoku where the usual 3x3 domains are arranged in the form of 9link pieces of chain so a domain, unlike in the Jigsawdoku, can
cross over other domains 
27 domain  9link chains 
Books available 

Quadrata 
Futoshikistyle puzzle but taking it further with letters. Size increases as the week goes on. Quadrata is the thinking person's
Futoshiki. 
Ranges from 4x4 with letters to 10x10 with numbers 
Books available 
CrosswordSudoku Chimera... 

Kakuro 
Clues are sums and each string of numbers cannot have more than one occurance of any particular number. 
Gets bigger as the week goes on. 

Gogen Family... 
(25 letters to go on a 25cell puzzle board. Clue letters are given and clue words have to be spelled out on adjacent cells, stepping in any direction) 

UberGogen 
like the normal, newspaper Gogen but not all of the clue letter are in the words 
9 letter clues, real words 
Books available 

UltraGogen 
Fewer clue letters but all of the letters are in the words 
92 letter clues, real words 
Books available 

HyperGogen 
Instead of real words, letterstrings are used. Some clue letters are not in the letterstrings. 
92 letter clues, letter strings 
Books available 

GoldenGogen 
Like the HyperGogen  not all of the clue letters are in the letterstrings but the clue letters can be as few as the theoretical one and the layouts are designed by me, not a computer. 
91 letter clues, letter strings. Only available in books and on TShirts 
Books available 