Abstract Art
- Kropki dots
- Whisper lines
- Parity lines
- Renban lines
- Nabner lines
- Palindromes
The brief
- Divide the grid into eight non-overlapping 2x4 regions, which can each be placed either horizontally or vertically.
- It must be determined which one of the digits 1-9 is missing from the grid. The other eight digits should each appear once in every row, column and region.
- RENBAN (pink) - digits along the pink line form a consecutive set, which can appear in any order.
- NABNER (yellow) - no two digits on the yellow line may be consecutive (or the same.)
- REGION SUM ( darker blue) - on the blue line, digits in each region have the same total.
- GERMAN WHISPER (green) - adjacent digits on the green line must have a difference of at least 5.
- PARITY (red) - digits on the red line must alternate between odd and even.
- PALINDROME (grey) - the string of digits on the grey line reads the same in either direction.
- SAME DIFFERENCE (turquoise) - each pair of adjacent digits on a turquoise line has the same difference. This difference value can be different for different turquoise lines.
- KROPKI - two digits connected by a black dot have a 2:1 ratio (one is double the other.)