Merge branch 'main' into gitbook

Author: zhugelianglongming

README.md

@@ -84,6 +84,7 @@
 - [Sudoku.com](https://sudoku.com/zh)
 - [SudokuWiki.org](https://www.sudokuwiki.org/Main_Page)
 - [Sudoku Kingdom](https://sudokukingdom.com/)
+- [SudokuPad](https://sudokupad.app/)
 - [Sudoku Puzzle](https://cn.sudokupuzzle.org/)
 - [variantsudoku.top](http://variantsudoku.top/puzzles)
 

images/sudoku/锯齿+无缘数独.png

@@ -34,6 +34,7 @@
 - [KrazyDad](https://krazydad.com/play/killer/)
 - [独·数之道](http://www.sudokufans.org.cn/lx/game.index.php?type=killer) 【需要登录】
 - [三思](https://www.12634.com/sudoku/killer-sudoku/level5)
+- [SudokuPad](https://sudokupad.app/endless/killerstart)
 - [杀手数独](https://cn.puzzle-killer-sudoku.com/?size=8)
 - [有一个数独](https://shudu.one/killer-sudoku.php)
 - [Sudoku.com](https://sudoku.com/zh/killer)

非标数独/9宫/计算类/内提示类/杀手数独.md

@@ -25,11 +25,13 @@
 
 - 窗口+对角数独
 - Cellblock Sudoku
+- X-Windoku
 
 ## 题库
 
 ### 在线题库
 
+- [SudokuPad](https://sudokupad.app/endless/startx4square)
 - [独·数之道](http://www.sudokufans.org.cn/lx/game.index.php?type=winx) 【需要登录】
 - [KrazyDad](https://krazydad.com/play/cellblock/)