However, once in a while there are apps that use e.g. When it comes to apps I often use a HTTP proxy like Charles to take a look at the HTTP and HTTPS traffic. Mostly I can use very simple techniques to check the security as there are so many basic security vulnerabilities out there. I've presented quite a few cases to prove that they very often are not. Sometimes I like to check if online services I use really are secure. :) I'm assuming some basic knowledge of UN*X, Java and Android. If you aren't a developer you might want to skip this one. the length of a 1-3-6 series is 3.)įirst seen odd/even Sudoku: If odd, the first odd number in the corresponding direction or, if even, the first even number.This tutorial for how to crack Android apps is one of my more technical posts. MaxAscending Sudoku: The length of the longest series of ascending digits in the corresponding direction. Higher skyscrapers block the view of lower ones, size being given by the digit. Skyscraper Sudoku: The number of visible skyscrapers from that side. Next-to-6 Sum Sudoku: The sum of all direct neighbours of the digit 6 in the row or column. Outside-2 Sudoku: Must be placed in one of the first two cells in the corresponding direction.

Outside clues per variant show:ĭifference Sudoku: The difference of the first two digits in the corresponding direction. Normal 6圆 sudoku rules apply to all sudokus, so each row, column and region must contain 1-6. A circle is an outside clue for both adjacent puzzles. This is one large puzzle, consisting of six different variants of 6圆 sudokus, all linked together by circles. May not work on non sudoku grids or special constraints. Hotkeys Selection Select cells + Mouse click/drag Add or remove from current selection Move selection +, + Add to current selection + Select all cells + + Deselect all cells + Invert selection, Tool sensitive selection Number Entry Insert value, pencil mark, candidate or colour Insert value, pencil mark, candidate or colour Button Insert value, pencil mark, candidate or colour Change Tool, Next mode +, Previous mode 'Digit' mode ( on German keyboard layout) 'Corner' mode 'Centre' mode 'Colour' mode + Enter digit in 'centre' mode + Enter digit in 'corner' mode + + Enter digit in 'colour' mode Undo / Redo + Undo last action + Redo last action if it was undo Check finished puzzle Button Press the check button to test basic sudoku rules.

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