1. Fixed a delay caused by checking the mine situation on the board: now the update speed of the game screen (especially when there are many grids on the board) has been greatly accelerated. Before, when automatically opening the blank area, the speed at which the blank area was opened was greatly slowed down because the entire board was checked for each operation. Checks are now only done for areas that may have opened mines. 2. Separate the icon from the exe program: Due to the misjudgment of some anti-virus software, now the icon will not be packaged into the exe in the form of a resource file. icon will be read from the file when the program window is created. 3. Modified icon file: now icon (especially at low resolutions) is displayed more accurately