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2026-10-15 · Medium · Daily Sudoku Solution

This replay starts from the original givens and explains both placements and candidate eliminations. It is separate from your saved game and does not count as completing the puzzle. Use Before and After to inspect the evidence for each move.

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This replay starts from the original givens and explains both placements and candidate eliminations. It is separate from your saved game and does not count as completing the puzzle. Use Before and After to inspect the evidence for each move.

Read this daily Sudoku solution in context

This walkthrough belongs to the date, difficulty and puzzle ID shown above. The original grid provides the starting conditions, and the technique summary reports this actual trace rather than a generic difficulty promise. The sample deduction below is taken from that verified trace.

Follow the replay without changing your save

The interactive replay lets you inspect every before and after state in order. It includes candidate eliminations as well as placements. Reading the replay is separate from playing: it does not enter numbers into your current board or increase completion statistics.

Original puzzle for this date

2026-10-15 Medium sudoku-v1-medium-0507c1c2c3c4c5c6c7c8c9r1r2r3r4r5r6r7r8r9185968546377815539428942167

Enlarge candidates

Choose a box to read its candidates and coordinates.

2026-10-15 Medium sudoku-v1-medium-0507 · Box 1c1c2c3r1r2r3186
Only the original givens appear here, without your saved entries or handwritten notes.

Techniques used in this puzzle

This is the 2026-10-15 Medium puzzle, ID sudoku-v1-medium-0507. Its 55 verified steps use the techniques below.

  • Naked single: 42
  • Hidden single: 12
  • Locked candidates: 1
Reveal a deduction containing answers — open when you are ready

Inspect one actual deduction

Locked candidates

All positions for 3 on the line lie inside the same box (r1c1, r1c3). Remove that digit from the rest of that box.

Board overview

Before this move. The highlighted cells and candidates are its evidence.c1c2c3c4c5c6c7c8c9r1r2r3r4r5r6r7r8r9237134824475962378395679123412356492491372828637498124952482165494937945372161681813782495123461261234135672481234129492136875

View the whole grid first. Zoom in to read candidates and their coordinates.

Enlarge candidates

Choose a box to read its candidates and coordinates.

Before this move. The highlighted cells and candidates are its evidence. · Box 1c1c2c3r1r2r32371342378395649

Purple cells give the evidence; a red cross marks a candidate this step can remove.

Purple cells give the evidence; a red cross marks a candidate this step can remove.

Before this move. The highlighted cells and candidates are its evidence. r1c1, r1c3; 3; row 1, box 1.
  • Remove 3 from r2c1
  • Remove 3 from r2c3

Board overview

After the justified placement or candidate elimination.c1c2c3c4c5c6c7c8c9r1r2r3r4r5r6r7r8r92371348244759627895679123412356492491372828637498124952482165494937945372161681813782495123461261234135672481234129492136875

View the whole grid first. Zoom in to read candidates and their coordinates.

Enlarge candidates

Choose a box to read its candidates and coordinates.

After the justified placement or candidate elimination. · Box 1c1c2c3r1r2r323713427895649
After the justified placement or candidate elimination.

2026-10-15 · Medium · sudoku-v1-medium-0507

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