Category: Document Understanding
Time taken: 11.42s
Model answer correct?: No
Prompt: You are given an image of a Sudoku puzzle. Your task is to detect and extract the digits from the board and output them as a 9x9 grid in text format. Identify the numbers visible on the Sudoku grid. Use a dot (.) to represent empty cells (i.e., those without a digit). Return the result as a plain-text 9x9 grid, where each row is a string of 9 characters. Maintain the correct order from top-left to bottom-right of the board.
Ground Truth: ...4.8...
.6..7..1.
7.2.9.5.4
.9.7.4.3.
..7.5.8..
.8.9.6.5.
9.4.1.7.8
.7..6..4.
...2.7...
Model Output: To solve the Sudoku puzzle and extract all visible digits along with empty cells represented by '.', I will now parse the grid image and output the solution as a 9x9 string grid.
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**Step 1: Understand Sudoku rules**
Standard Sudoku has 9 columns and 9 rows, numbered 1 through 9. Each row and each column must contain each digit from 1 to 9 exactly once. All digits already present in the image should be confirmed.
**Step 2: Extract existing digits from the puzzle**
From reading row by row (reading left-to-right, top-to-bottom):
- Row 1: . . . 4 . 8 . . → known: [., ., 4, ., 8]
- Row 2: . 6 . . 7 . 1 . → known: [., 6, 9, 5, 4] (wait — column 3 is unknown; let's list all)
Actually, better to process carefully. I’ll reconstruct the grid row by row from the image.
Let me write down the full grid as seen in the image, extracting each visible digit:
Row 1:
[., ., ., 4, ., 8, ., ., .]
Row 2:
[., 6, ., ., 7, ., 1, ., .]
Row 3:
[7, ., 2, ., 9, ., 5, ., 4]
Row 4:
[., 9, ., ., 7, ., 4, ., 3] → Note: column 4 is missing
Row 5:
[., ., 7, ., 5, ., 8, ., .]
Row 6:
[8, ., 9, ., ., 6, ., 5, .]
Row 7:
[9, 4, ., 1, ., 7, ., ., 8] → column 2 is filled; columns 3 and 5 missing
Row 8:
[7, ., ., ., 6, ., ., 4, .]
Row 9:
[., ., ., ., 2, 7, ., ., .]
Wait — I need to double-check. Let me go through each row systematically based on visual inspection.
Actually, let’s reconstruct the grid by going row by row and filling what we know.
But since this is a puzzle with pre-filled numbers, I should verify if there are any missing digits in the initial state — but the task says “detect and extract”, so only visible digits matter.
I will list all digits explicitly visible in each row from left to right:
**Row 1:**
Cells: (1,1) – , (1,2) – , (1,3) – , (1,4)=4, (1,5)–, (1,6)=8, (1,7)–, (1,8)–, (1,9)–
So: [., ., ., 4, ., 8]
**Row 2:**
(2,1)–, (2,2)=6, (2,3)–, (2,4)–, (2,5)=7, (2,6)–, (2,7)=1, (2,8)–, (2,9)–
→ [., 6, ., ., 7, ., 1]
**Row 3:**
(3,1)=7, (3,2)–, (3,3)=2, (3,4)–, (3,5)=9, (3,6)–, (3,7)=5, (3,8)–, (3,9)=4
→ [7, ., 2, ., 9, ., 5]
**Row 4:**
(4,1)–, (4,2)=9, (4,3)–, (4,4)–, (4,5)=7, (4,6)–, (4,7)=4, (4,8)–, (4,9)=3
→ [., 9, ., ., 7, ., 4]
**Row 5:**
(5,1)–, (5,2)–, (5,3)=7, (5,4)–, (5,5)=5, (5,6)–, (5,7)=8, (5,8)
