Logic Masters Deutschland e.V.

This puzzle is one of four practice puzzles that I created for this years WPC team round "Table for Four". In this round, teams of four players had to solve puzzles in four colours; each player had a coloured pen (red, green, blue, black) and wasn't allowed to write in a different colour. Each puzzle has grid size 9x9, and in each colour 20 cells have to be marked; one cell remains empty. No cell can be marked in more than one colour.

The clues outside the grid apply only for the player with the corresponding colour; the players are seated at four sides of a table, and clues are always orientated towards the player with the corresponding colour.

The rules for each player are:

Place two snakes of length 10 in the grid, where a snake consists of orthogonally connected cells. The two snakes cannot touch either themselves or each other, not even diagonally. Clues outside the grid represent the number of snake segments in the corresponding columns and rows respectively. The heads and tails of both snakes will be marked by circles in the grid.