Crossings (game)

Crossings is a two-player abstract strategy board game invented by Robert Abbott. The rules were published in Sid Sackson's A Gamut of Games . Crossings was the precursor to Epaminondas, which uses a larger board and expanded rules.

Gameplay

Equipment

• 1 8x8 gameboard
• 32 stones (16 of each color)

Setup

	a	b	c	d	e	f	g	h
8									8
7									7
6									6
5									5
4									4
3									3
2									2
1									1
	a	b	c	d	e	f	g	h

This is the starting position of Crossings.

Object

• Cross one stone to the opponent's end of the gameboard.

Turns

• Play alternates with each player making one movement on a turn.
• Red takes the first turn.

Movement

A group is a series of one or more same-colored stones adjacent to one another in a line (diagonal, horizontal, or vertical). A stone may belong to one or more groups.

• A player may move a single stone, an entire group, or a subgroup.
• A group consisting of a single stone may move one space diagonally or orthogonally into an empty square.
• A group must move along the line which defines it. It may move a number of spaces equal to the number of pieces in that group.
• When part of a group is moved (a subgroup), it must move along the line which defines it. It may move a number of spaces equal to the number of pieces in the subgroup.
• When a subgroup is moved it must involve one of the end stones.
• Pieces may not move onto an occupied square.

Capturing an enemy stone

• If the first stone in a moving group encounters a single enemy stone, the group's movement stops there, and the enemy stone is captured.
• If the first stone in a moving group encounters an end stone of an opponent's group, it can capture that stone if the opponent's group is smaller.
• If it cannot capture the end stone because the opponent's group is the same size or larger, it is not allowed to move on to that square.

End of the game

• A player possibly wins the game if they get a stone on the home row, or row furthest from their side. If the opponent cannot get a stone of their own onto the first player's home row in the next move, the first player wins. Otherwise, those stones are "locked"; they cannot be moved or captured. The next attempt at crossing, as this is called, will determine the winner (unless it, too, is immediately followed by a counter-crossing, and so on.)
• The game is a draw if no player can complete the objective. Draws are rare.

References

• Sackson, Sid (1982) [1st Pub. 1969, Random House, New York]. "Crossings". A Gamut of Games. Pantheon Books. pp. 46–51. ISBN   0-394-71115-7.
• Schmittberger, R. Wayne (1992). "Epaminondas and Crossings". New Rules for Classic Games . John Wiley & Sons Inc. pp.  91–3. ISBN   978-0471536215.