Go for the GoldG 15

Go for the Gold G15:
Win 8 Gold Daily Challenge Badges

These achievements require that you earn 8 Gold and 12 Bronze Daily Challenge Badges. Daily Challenges consist of short puzzles that generally require you to complete a certain number of rows, columns, or shapes. Unlike standard Sudoku, Daily Challenges have symbols instead of numbers, or have irregular shaped "houses," instead of the typical 3x3 grids. There are three Daily Challenges each day. Completing a challenge will award coins based on the difficulty of the challenge. 100 coins for Easy, 150 for Medium, 200 coins for Hard, and 300 coins for Expert. If you complete all three challenges for a day, you will earn an additional 150 coins. These coins are cumulative from the first day of the month to the last. Challenges for a given month are only available until the final day of the month, but not in advance. For example, August 15th challenge will become available on August 15th, and remain available until August 31st. You can circumvent this limitation by advancing your computer's time to the last day of the current month. All challenges for the current month will be available.

To earn a Bronze Badge, you must get 2,000 coins throughout the month. To get Gold, you need 12,000 coins. The difficulties of the challenges are random, so the amount of coins available in a given month will vary. In general, completing all three challenges on about 20 days in a month should be enough to earn Gold.

You could choose to play the Daily Challenges each day that they become available. This would require a daily commitment of 5 to 10 minutes, depending on Sudoku skill. Alternatively, you could just wait until the end of the month when all challenges are available and power through them. This will total to around 2 to 5 hours of playtime to obtain Gold, but less than one hour to grab Bronze.

You may replay challenges from previous months to accomplish this achievement. To do this, make sure your system clock is set to the correct time and date before you open Microsoft Sudoku. Once the program is opened and you have logged into Xbox Live, change your system time to the last day of a previous month, then go into the daily challenges and view all of the challenges for the month the same way you would normally. Note: You *must* open the game while your system's time is accurate, or you won't be able to log in, and you won't be able to access the challenges to begin with.

This can be achieved via changing the system clock. Simply set your system clock to the last day of a previous month, and you will have access to all of the challenges and medals for that month, so you do not need to spend an entire year pursuing these achievements.

To illustrate, pretend this had been posted in January 2018. I would set my clock to 12/31/17, and do challenges until I have received the December 2017 gold medal. I would then set the clock to 11/30/17, and achieve the November 2017 gold medal. I would do this for each month until I have achieved all of the gold medals from May 2017 through December 2017 to give me "Go For The Gold." Since I would have also achieved the bronzes for these months on the way to the golds, I would then just need to achieve the bronze medals from January-April 2017 to give me "Go For The Bronze." Unlike other MS Casual Games, Sudoku has no achievement for silver medals, for some reason.

Note that the specific months used for this don't matter. You can get your medals in any order from any year since the game has been released. The example used was chosen for simplicity.