Umekichi the Landmark of Puzzle History app for iPhone and iPad

This is an app of some puzzles unity　contains sudoku family. It has 10 kinds of placement puzzles.
Yazhime, Queen Place, kNight Place are our original puzzles of using chess pieces.
Lets enjoy new experience to think !

All puzzles are part of "Umekichi Project".

**** puzzles
[Our Original Puzzles]
(1) Yazhime 8x8, 5x5
(2) Queen Place 7x7, 5x5
(3) Skewdoku 9x9, 8x8, 6x6, 5x5
(4) kNight Place 6x6, 5x5, 4x4
(5) SDK Kawaii
(6) SDK Tatami 7x7x9, 8x8x11, 9x9x13
(7) SDK Lattice

[Orthodox Puzzles]
(1) SDK (=sudoku) 9x9, 8x8, 6x6, 5x5
(2) SDK Hyper
(3) SDK Hyper Diagonal
(4) SDK Diagonal 9x9, 8x8, 6x6


**** How to Play:

[Yazhime] -----------------------------
(1) Put one of the chess pieces given in empty cells
(2) If there is no other kind of pieces, no piece attack to same kind of pieces each other
(3) When filled all cells, each piece number are as follow:
Queen(8), Rook(8), Bishop(10), King(10), kNight(14), Pawn(14)

Supplement:
(1) Pawn can not be diagonally adjacent
(2) King can not be neither orthogonally nor diagonally adjacent
(3) Bishop can not repeat on each diagonal line
(4) Rook can not repeat on each row and column
(5) Queen can not repeat on each row, column and diagonal line
(6) kNight is denoted by "N", because "K" is used for King
----------------------------- [Yazhime]

[Queen Place] -----------------------------
(1) Put one of the numbers given in empty cells
(2) Each number has a role of chess "Queen"
(3) If there was no other numbers, no number attack to same number each other
----------------------------- [Queen Place]

[Skewdoku] -----------------------------
(1) Put one of the numbers given in empty cells
(2) Digits can not repeat on each diagonal line
(3) Each region bounded by thick border contains each digit exactly once
----------------------------- [Skewdoku]

[kNight Place] -----------------------------
(1) Put one of the numbers given in empty cells
(2) Each number has a role of chess "kNight"
(3) No number attack to same number each other
(4) Digits can not repeat on each block bounded by a thick border
----------------------------- [kNight Place]

[SDK Kawaii, Tatami] -----------------------------
(1) Put one of the numbers given in empty cells
(2) Digits cannot repeat on each column, row, and block
----------------------------- [SDK Kawaii, Tatami]

[SDK Lattice] -----------------------------
(1) Put one of the numbers 1-9 in empty cells
(2) Each horizontal row contains each digit exactly once
(3) Each vertical column contains each digit exactly once
(4) Digits cannot repeat on each block bounded by a thick border

Supplement:
The shape of the block of "SDK Lattice" is different from standard Sudoku. Blocks of Chinese lattice consists of two layers.
(1) The first layer has four 3x3-blocks. In the puzzle board, These blocks were colored by green.
(2) The second layer has four 2x2-blocks, four 3x2-blocks, and one 3x3-block. Cells of these blocks that excepted overlap with the first layer are colored by blue.

There is 13 blocks in first and second layer. Digits cannot repeat on each block bounded by a thick border.
----------------------------- [SDK Lattice]

[SDK, SDK Hyper, SDK Diagonal] -----------------------------
These are famous puzzles, therefore we dont write these rules here.
----------------------------- [SDK, SDK Hyper, SDK Diagonal]

[SDK Hyper Diagonal] -----------------------------
(1) Rules of "SDK Hyper" apply
(2) Additionally, no digit repeats on diagonals
----------------------------- [SDK Hyper Diagonal]

If you want to know about Umekichi project, please see our support site.


In this application, we adopted a new input method "Thumb One" for a smart phone. When you are working with a smart phone with one hand, you can enter the answer and pencil marks in just thumb of one hand.