as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
write an algorithm to create a sudoku board.
user
a simple algorithm to create a valid sudoku board could involve the following steps: 
1. create an empty 9x9 grid, with all values filled in with zeros.
2. place the numbers 1 to 9 randomly on the edges of 3x3 sub-grids.
3. fill in the remaining values of the sub-grids by randomly choosing numbers from 1 to 9 that are not already present in the same row, column, or sub-grid.
4. repeat step 3 until all cells in the 9x9 board are filled in with valid numbers.
5. check if the final board is valid according to sudoku rules and repeat the process until a valid board is produced.
assistant