World sudoku championship 2018 Prague
During the WSC and WPC week in Prague we were at Stromovka park and made some sudoku of stones and other natural materials... it was great fun:) you can try to solve them, rules are below the photos...
(authors of puzzles: Kuba Ondroušek, Honza Vondruška, Jakub Hrazdira, help with realisation: Klára Vytisková, Lucie Klimešová)
just a blank grid... ready for ideas...
Greater than sudoku - Greater than sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
All digits should follow the given inequality signs.
Greater than sudoku - Greater than sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
All digits should follow the given inequality signs.
Greater than sudoku - Greater than sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
All digits should follow the given inequality signs.
Plus minus lines sudoku - Plus minus lines sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
Cell with a horizontal line contains a sum the two neighbouring cells in the particular row. Cell with a vertical line contains a difference the two neighbouring cells in the particular column. All possible lines are given.
Fortress sudoku - Fortress sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
If a grey cell (with maple sign) and white cell share an edge, the number in the grey one (with maple sign) is higher.
Counting neighbours sudoku - Counting neighbours sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
Number in a cell with a circle (white stone) tells you how many distinct digits you can find in up to 8 neighbouring cells (sharing edge or corner). Number in a cell with a cross (black stone) tells you how many distinct digits you can find in up to 4 diagonally neighbouring cells (sharing a corner). All possible circles and crosses (stones) are drawn (placed).
Kropki sudoku - Kropki sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
All pairs of touching squares which contain consecutive values are marked with a white circle (stone). All pairs of touching squares which contain values where one number is exactly twice the value of the other are marked with a black circle (stone). When 1 and 2 touch, then either a white circle or a black circle will be given. All possible circles (stones) are given.
(Irregular) dots sudoku - (Irregular) dots sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
There is a white dot (stone) between two cells if the difference of the digits they contain is equal to the number of a row they are part of. There is a black dot (stone) between two cells if the sum of the digits they contain is equal to the number of a row they are part of. The same applies to the columns. All possible dots (stones) are drawn (placed).
Step by step sudoku - Step by step sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
There is exactly one way how to go in a cycle through all grey arrows (special maple signs), every time making that number of steps to the next arrow (maple sign) which is given by the digit in the previous cell with an arrow (maple sign).
Parity circles sudoku - Parity circles sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
If there is an odd number O in a circle (cell with a stone), there are exactly O odd numbers around it. If there is an even number E in a circle (cell with a stone), there are exactly E even numbers around it. All possible circles (stones) are given.
Same sum sudoku - Same sum sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
The sum of four cells adjacent to a grey one (with a white stone) is the same in the whole grid.
Emitters sudoku - Emitters sudoku
Fill in the grid with digits 1 to 4 so that every row, column and outlined box contains four different digits.
Several cells are marked with a star (stone). In all four directions maximal possible length is given until the sum of the digits is higher than the value of an emitter.