Duovallis → German.

Inventor: Frederik Adams,
Ranks: Four
Sowing: Multiple laps
Region: Germany

Duovallis (lat. "Two Valleys") was invented by Frederik Adams in late 2012 shortly before his 17th birthday. He lives in Kripp near Remagen (Germany). His hobbies are chess and canoeing.


Duovallis is played on a board, which consists of four rows, each one with six holes.

Each player puts four stones of his color (white or black) in his holes (blue or red), the neutral ones (grey) remain empty.

Initial Position

The player who got the white stones starts the game.

It is only permitted to begin a move from a hole, if it is owned by the player, contains at least two stones, half of them or more must be of the player's color.

A move may only start from the player's front row, if there is no move possible from his back row.

A move may never start from a neutral hole.

The stones are sown, one by one, in an anticlockwise direction, at first the opponent's ones, then the own ones. When the end of the back row is reached, the player continues to sow into the neutral holes until he gets to his front row. Stones are never sown into the holes of the opponent.

If the last stone falls into an occupied hole, which thereafter contains at least 50% of stones of his own color, the player distributes its contents in another lap.

If, however, there is a majority of opponent's stones, the move ends.

The move is also terminated, if the last stone was dropped into an empty hole.

If this hole is a neutral one, nothing will be captured.

If it is one of the player's holes, a capture will result provided that the corresponding hole of the opponent has stones.

  • If the last stone is dropped into a hole of the player's front row, the capture will be on the opponent's back row.
  • If the last stone falls into a hole of his back row, he will capture from the opponent's front row.

The player removes the contents of the opponent's hole.

  • Own stones from this hole will immediately be placed into the hole effecting the capture.
  • Three stones of the opponent's color will be swapped for one own stone, which will also be put into the hole that effected the capture.

If opponent's stones are left over, they will be placed in front of the player and counted in the next capture.

The game ends as soon as a player is unable to move. That is, he has got only singletons or he owns less of half of the stones in any occupied hole.

A player must move at his turn. If the player is unable to move he loses.

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