Logic puzzles
Doppelblock
Place two blocks in every row and column so the clues match the sum between them.
- 4–16 min
- Single player
- Today's puzzle
Five LettersSudokuCipher QuoteTentsNonogramTarget NumberQueensLights OutEquation HuntTakuzuFutoshikiPipe NetworkSkyscrapersBridgesWord SearchCalcudokuAkariHitoriLine Link
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How to play
- Every row and every column contains exactly two blocks.
- The other cells are a permutation of 1 to N−2.
- A clue is the sum of the numbers strictly between that line's two blocks; 0 means the blocks touch.
Controls
Select a cell, then a digit or B for a block. Keyboard: arrows, digits, B, Backspace, H for a hint.
About this game
Free Doppelblock on 5×5 and 6×6, with a 12-level campaign and a daily puzzle. Each line has two blocks, the rest is 1 to N−2 once each, a clue sums the numbers between the blocks, and every puzzle has one solution.
- Sizes
- 5×5, 6×6
- Solution
- Unique
- Campaign
- 12 levels, hint, undo
