Keisuke is a

logic puzzle A logic puzzle is a puzzle deriving from the mathematical field of deduction. History The logic puzzle was first produced by Charles Lutwidge Dodgson, who is better known under his pen name Lewis Carroll, the author of ''Alice's Adventures in W ...

published by Nikoli.

Rules

''Keisuke'' is played on a rectangular grid, in which some cells of the grid are shaded. Additionally, external to the grid, several numeric values are given, some denoted as horizontal, and some denoted as vertical. The puzzle functions as a simple numeric

crossword A crossword is a word puzzle that usually takes the form of a square or a rectangular grid of white- and black-shaded squares. The goal is to fill the white squares with letters, forming words or phrases, by solving clues which lead to the ans ...

puzzle. The object is to fill in the empty cells with single digits, such that the given numeric values appear on the grid in the orientation specified.

Example

ACROSS → 13, 23, 233, 3221, 21222 DOWN ↓ 12, 21, 22, 232, 3132, 33313

Solution

{, class="wikitable" width="150px" style="font-style: bold; text-align: center;" , - , 2, , 3, , bgcolor="black", , , 1, , 3 , - , bgcolor="black", , , 3, , 2, , 2, , 1 , - , 2, , 3, , 3, , bgcolor="black", , , 3 , - , 2, , 1, , 2, , 2, , 2 , - , bgcolor="black", , , 3, , bgcolor="black", , , 1, , bgcolor="black",

Solution methods

The best way to start a Keisuke is to look for intersecting digits in the combinations possible within the grid. For example, if the grid shows only one 2-digit/4-digit intersection, and among the 2- and 4-digit numbers, there is only one combination which shares the intersecting digit, the correct values have been found.

External links

Nikoli's Japanese page on Keisuke
Logic puzzles

Rules

Example

Solution

Solution methods

See also

External links