Copyright (c) 1992 Mark Steere
Quadrature is a two player strategy game
played on a 11x11 square board. This is the initial configuration. Each player has a set
of 16 stones. Players start with 9 stones on the board with 7 held in reserve. Players
also have "markers" explained later.
- Players take turns making basic moves. A basic move is to move a stone *one space*
forward, diagonally forward, or sideways. Players cannot move backwards or diagonally
||SQUARING - an aggressive maneuver in Quadrature. To
"square" an enemy stone, you move to form a rectangle on the board with three of
your stones and one enemy stone. So you have three "squaring" stones and one
"squared" stone. The enemy "squared" stone is then removed from the
board and replaced with one of your own reserve stones. Removed stones are returned to
their original owners. Players do not take ownership of each others stones.
||CHAIN REACTION - it can happen in Quadrature. When you replace
an enemy stone with one of your own reserve stones, your newly added stone can square
additional enemy stones.
||GOAL - There are two
ways to win in Quadrature. If you kill enough enemy stones to leave your opponent with two
or less stones on the board, you win. Also, if you can get three of your stones onto the
enemy "home plate", you win. A player's home plate consists of the three points
in the middle of his side of the board.
- Each player has a marker which is a flat square chip. Each player's marker is the same
color as his stones. The marker has a single dot on one face and two dots on the opposite
you make a non-aggressive, sideways move, you must place your marker on the board with the
single dot face up. You can put it anywhere on the board. The location doesn't matter;
it's just showing that you made one non-aggressive sideways move. If your marker is
already on the board with the single dot face up, and you make a non-aggressive sideways
move, you must flip your marker over so that the two-dot face is showing. This shows that
you have made two consecutive, non-aggressive sideways moves. A non-aggressive sideways
move is a sideways move which does not kill any enemy stones.
your marker is on the board with the two-dot face showing, you are not allowed to make a
non-aggressive sideways move. You must make a forward, diagonally forward, or aggressive
sideways move. An aggressive sideways move kills enemy stones. Once you have made a
forward, diagonally forward, or aggressive sideways move, you must remove your marker from
the board. It doesn't matter if it is showing a single dot or two dots; a forward move
always clears your marker from the board.
is no limit to the total number of non-aggressive sideways moves you can make. You just
can't make more than two non-aggressive sideways moves consecutively.
||This rule was instated because players have a tendency to approach each other and
then stall the game by making an endless series of non-aggressive sideways moves. The
marker forces players to engage each other in combat, no matter how reluctant they may be.
- You must not move an on-board stone to any point that completes an enemy
square. Suicide moves are not allowed, no matter what.
If Black moves to , he will
square the white stone to his left, and produce a chain reaction that will square the
other white stone. White will loose, since it will have just two stones. The home plates
are represented in the example by the red points.
The game can be played at Rognlie´s