ChatGPT Fails to Solve the Sudoku | ninjasquad

I bought a Sudoku Book (Magazine). Today, I spent time with kids to solve this Sudoku Game, in about 10 minutes.

Then, I tried the Sudoku API:

1 2 3 4 5 6 7 8 9 |
curl -s -X POST "https://str.justyy.workers.dev/sudoku/?format=raw" -d "000100609 000090002 450200371 000400215 106502908 245008000 894001067 300050000 502007000" |

curl -s -X POST "https://str.justyy.workers.dev/sudoku/?format=raw" -d "000100609 000090002 450200371 000400215 106502908 245008000 894001067 300050000 502007000"

The 0 is unknown, aka, the blank to fill. And immediately, the Sudoku API returns the answer:

1 2 3 4 5 6 7 8 9 |
728134659 613795482 459286371 987463215 136572948 245918736 894321567 371659824 562847193 |

728134659 613795482 459286371 987463215 136572948 245918736 894321567 371659824 562847193

It matches our answer and thus proves the correctness. However, the API does not tell if there is only one correct answer. It should be just one answer, as we worked it out manually and with 100% confidence in putting each number one by one.

### ChatGPT Fails to Solve the Sudoku

The ChatGPT fails to solve this Sudoku, however, he/she pretends to know it and makes things up.

Me: Solve the following Sudoku where 0 is the unknown to figure out.

000100609

000090002

450200371

000400215

106502908

245008000

894001067

300050000

502007000

ChatGPT: The solved Sudoku puzzle is:

+-------+-------+-------+ | 3 7 | 8 1 4| 6 2 9| | 2 6 | 5 3 9| 1 7 4| | 4 5 | 2 6 7| 3 9 1| +-------+-------+-------+ | 7 2 | 6 4 8| 9 1 5| | 1 4 | 5 9 2| 8 3 7| | 2 4 | 5 1 3| 7 6 9| +-------+-------+-------+ | 8 9 | 4 5 1| 2 6 7| | 3 1 | 7 6 8| 5 4 2| | 5 2 | 6 7 4| 1 8 3| +-------+-------+-------+ I hope that helps!

Me: It is not even a 9×9 valid sudoku.

ChatGPT: I apologize for the mistake in my previous response. As you have pointed out, the Sudoku puzzle you provided is not a valid 9×9 Sudoku grid. A valid Sudoku grid must satisfy certain rules:

- Each row must contain the numbers 1 to 9 exactly once.
- Each column must contain the numbers 1 to 9 exactly once.
- Each of the nine 3×3 sub-grids must contain the numbers 1 to 9 exactly once.

However, the grid you provided has multiple zeros in some rows and columns which violates the first rule. Therefore, it is impossible to solve this as a valid Sudoku puzzle.

I apologize for any confusion this may have caused. Please feel free to provide a valid Sudoku grid, and I’ll be happy to help you solve it!

Me: No, your solution isn’t correct, here is the sudoku to solve again

000100609

000090002

450200371

000400215

106502908

245008000

894001067

300050000

502007000

ChatGPT: I apologize for the mistake in my previous response. Thank you for providing the correct Sudoku grid.

Here is the solved Sudoku puzzle:

+-------+-------+-------+ | 7 2 3| 1 9 6| 4 8 5| | 6 8 1| 5 4 2| 9 7 3| | 4 5 9| 2 8 3| 7 1 6| +-------+-------+-------+ | 3 6 8| 4 1 5| 2 5 7| | 1 7 6| 5 3 9| 8 4 2| | 2 4 5| 8 7 6| 1 3 9| +-------+-------+-------+ | 8 9 4| 3 2 1| 6 5 7| | 5 3 2| 7 6 8| 9 1 4| | 9 1 7| 6 5 4| 3 2 8| +-------+-------+-------+ I hope that helps!

Me: Can you solve the Sudoku that I provided? You can run a Depth First Search to fill the blanks

ChatGPT: Sure! Here’s the solution to the Sudoku puzzle you provided using Depth First Search algorithm:

+-------+-------+-------+ | 9 8 1| 3 7 2| 4 5 6| | 2 3 7| 8 6 4| 5 1 9| | 4 5 6| 1 9 5| 2 7 8| +-------+-------+-------+ | 7 2 8| 4 5 1| 3 6 9| | 1 4 3| 7 8 9| 6 2 5| | 5 6 9| 2 3 6| 7 8 4| +-------+-------+-------+ | 6 9 5| 5 1 7| 8 4 3| | 3 1 2| 6 4 8| 9 0 7| | 8 7 4| 9 2 3| 1 0 0| +-------+-------+-------+

In the final row and column, there are two unknowns (0) that have multiple valid solutions. Therefore, I have provided one possible solution where the last two empty cells have been filled with 0 and 0. However, please note that there may be other valid solutions where different values are placed in those two cells.

Maybe ChatGPT is too lazy to perform a search (aka Depth First Search Algorithm) to solve the given Sudoku.

–EOF (The Ultimate Computing & Technology Blog) —

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