Four-symbol Latin grid: rules and printable materials

Fill 1–4 so each row and column contains each symbol once, keeping the printed clues.

Players

1–6

Plan for

8–15 minutes

Bring

Four-by-four clue grid, pencil and separate key

Keep the eight givens

Use the printed four-by-four grid. Rows are 1–4 and columns A–D. Fill the eight empty cells with 1,2,3 or 4. Never change a printed clue. This is a symbol-placement puzzle, not an arithmetic exercise: every row and every column must contain each value once. Diagonals do not have a special rule.

Eliminate possibilities

For an empty cell, list which values are absent from its row, then remove values already in its column. A cell with one remaining value can be filled. Keep tentative notes small and erase them clearly. One to six people may solve together; rotate the pencil and let each person explain a step instead of racing.

Worked deduction

Row 1 reads 1,blank,3,blank, so it needs 2 and 4. Column D already has 1 and 2 in rows 2 and 3, so D1 cannot be 2 and must be 4. B1 must then be 2. This deduction uses both row and column, not a guessed repeating picture. Recheck a filled value against both before moving to the next blank.

Verify all eight lines

The key has rows 1–2–3–4,2–3–4–1,3–4–1–2,4–1–2–3. The printed givens make this puzzle unique, as checked across all 576 four-symbol Latin grids. Verify four rows, four columns and all original clues. A grid with correct totals can still repeat symbols and fail; adding values is not the validation rule.

Finish and adapt

Stop after a valid grid or the agreed twelve-minute attempt. Offer to reveal one empty cell rather than the whole key. Symbols can be read aloud or copied by a helper. Do not scramble the givens and assume a new unique puzzle; any new layout needs its own solution check. This is not a branded puzzle app or online solver.

Printable materials

Preview at 100% scale, with browser headers and footers off. Cut with suitable help. Keep host keys separate. This is a manual tabletop kit, not an online opponent, automatic judge or solver.