Arbos

A board game loosely similar with Go




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Components

Definitions

Setup

Turn

Scoring

Various


In Latin, "arbos" means "tree".



Components

The board (of the game) is a rectangle formed from 20 * 20 cells. On the sides of the board, on the vertical, each row is labeled from A to T. On the sides of the board, on the horizontal, each column is labeled from 1 to 20.

There are 80 white, 80 black, and 20 green tokens.



Definitions

Cell = a square of the board. Each cell is identified by its coordinates, which are represented by the labels of the row and of the column put next to each other.

Token = a white, black or green disc.

Spore = a white or black token.

Seed = a green token.

Neighbor cells = cells which have a common side or corner.

Free cell = a cell with no token on it.

Occupied cell = a cell with a token on it.

Neighbor tokens = tokens which are on neighbor cells.

Linked spore = a spore which is neighbor with another spore of the same color.

Linked seed = a seed which is neighbor with a spore.

Tree = a group of spores (even a single one), of the same color, which are linked among them on the board. A seed is a part of a tree (of either player, or for both of them) if it's linked to at least one of the spores of the tree.



Neighbor tokens

"T" = token, "S" = token neighbor on a side with "T", "C" = token neighbor on a corner with "T":

C

S

C

S

T

S

C

S

C



Setup

The number of players is two.

The board is cleared of any token.

Each player receives all the white or black spores, either according to their preference, or as is randomly determined. The name of each player is the same as the color of his spores: white or black.

Each player receives 10 seeds.

Each player, one after another, puts a seed on the board, on a random cell, as quickly and as spread as possible, until each player puts 10 seeds on the board; this number is optional and can be from 7 to 10; the players keep the rest of the seeds. A seed may be put on the board only if between it and any other seed from the board there are at least 2 empty cells either on the vertical or horizontal axis.

The game ends when neither player can put a token on the board, or when both players say "pass" one after another.



Turn

Each player has his turn, sequentially, when he may do one of the following actions:

  • Put one of his spores on a free cell which is neighbor with a seed.

  • Put one of his spores on a free cell which is not neighbor on a side with a spore of the other player.

  • Put one of his seeds on a free cell.

  • Replace a spore, from a cell, with one of his seeds.

  • Remove from the game one of his seeds and do twice either of the first two actions, or once both actions.

Each player may have maximum 3 trees at any given time. If a player sees that the other player has more than 3 trees, the other player must remove from the board his / her spores until he / she has 3 trees.

From the moment his turn begins, each player has a maximum time limit (for example, 5 minutes) to put a spore on the board. If he doesn't put a spore within this time limit, it is considered that he says "pass".

Any player may say "pass", that is, he doesn't put a spore on the board. In this case, the other player has his turn.

The white player has to put the first seed and the first spore on the board.

After a token is put on the board, it may not be moved or removed from the board, unless clearly stated by a rule.



Scoring

The game is won by the player who has the highest number of seeds linked to (any) 2 of his trees. If both players have the same number, the black player wins the game.



Various

If a player doesn't follow the rules of the game, he is declared defeated and the game ends.











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