Chessboard Sudoku

Hello everyone,

The Chessgame Sudoku website has grown a great many more puzzles since the last time I posted here. For those who don't know, these puzzles challenge you to prove that you know how the chess position shown came about by filling in the digits of a Sudoku puzzle that the chessboard is laid on top of. Some of the puzzles, like the one I'm posting here, even give you the moves as soon as you begin to solve the puzzle. (Others ask you to analyze the position to realize which moves must have taken place.)

The key is that pieces, when they move, always move from the digit they sit on to a specific other digit. In the puzzle below -- and indeed most of the puzzles --, White pieces always move to the next digit UP (so if it sits on a 3, its next move must be to a 4) and Black pieces always move DOWN in number (so it if has moved and now sits on a 5, it must have moved there from a 6, for example).

Please take a look, join the community of Chessgame Sudoku'ers, and let me know what you think!

Puzzle #152 is titled "Pushed Past" and as I say, it gives you the set of moves so you have a good leg up! Also, it has an easy mate-in-2 problem to solve, giving you three moves that are not even shown (but that are given to you as soon as you start solving), so this one truly should be an easy one. I know there is only one given digit, but you truly can puzzle out all 80 of the other digits fairly easily, using your chess (mostly) and Sudoku skills.

Please give it a shot and contact me if these puzzles interest you!

Work the puzzle below online at http://www.manushand.com/chessgame?puzzle=152

It's definitely interesting but I have no clue how to solve it. 

Hi @EKAFC - Let's see how I can help! I will be happy to chat with you (or anyone) to get you a foothold so you can enjoy (and solve!) this and other Chessgame Sudoku puzzles.

@EKAFC and everyone else -- here is a quick starter-tips sheet I put together that can hopefully help explain how a Chessgame Sudoku puzzle can be approached. This uses the puzzle that I mentioned in this thread, and it gives away many of the digits. In actual practice, you would use the facts and deductions that are described on this tip sheet to fill in all of the numbers that are already shown to you on the tip sheet. Let me know if this helps, and if you have any other questions, please feel encouraged to contact me!

I don't really get how moving the pieces up/down relates to the numbers... it's very weird.

Hi @ninjaswat -- When it says that the White pieces move UP, what this means is that if a White piece that has moved sits on the digit 4, then it must have moved there from a square holding a 3, and its next move, if it makes one, can only be to a square holding a 5.

Black pieces moving DOWN means that the digits they move through REDUCE instead of increase.  So a Black piece that has moved and is now on a 4 must have arrived there from a 5.

Does this help and answer your question?

OOH Yes I get it now

I have added a couple more "tips" to the Chessgame Sudoku tips-sheet. Please check out the puzzles at http://www.manushand.com/chessgame and let me know your findings/thoughts/suggestions/etc. Thanks!