Question: Write a function to solve a mini-Sodoku problem as follows. On a partially-filled 3x3 board, place int instances in the range {1, 2, 3} so

Write a function to solve a mini-Sodoku problem as follows. On a partially-filled 3x3 board, place int instances in the range {1, 2, 3} so that no row or column contains a repeated value. Explain your reasoning.

Partially filled

_ 2 _
3 1 _
_ 3 _

Solved

1 2 3
3 1 2
2 3 1

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