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The initial appearance of the first level.

JezzBall is a video game originally published for Microsoft Windows in 1992. The player must capture parts of a rectangular space by dividing it with horizontal or vertical lines. While each line is being drawn it must not be touched by bouncing balls. JezzBall has similarities with Qix, a 1981 arcade game.


JezzBall was programmed by Dima Pavlovsky. It was published in 1992 as part of the Microsoft Entertainment Pack and later released within the Best of Windows Entertainment Pack. Despite Microsoft withdrawing support in 1996, the game has many fans and there are several clones of the game on a range of desktop and PDA operating systems.


The game starts with two red-and-white balls, referred to as atoms, bouncing about a rectangular field of play, or room. The player points at a position within the room and clicks to start building either vertical or horizontal lines, also called walls, from the pointer position either up and down or left and right. If the walls reach the edge of the area without a ball colliding into them then the area bound by the line and not containing a ball is 'captured' and filled black. If a ball collides with a wall while it is building then the wall stops at that point and the player loses a life. The player has a time limit within which to capture at least 75% of the room's surface area. When that percentage is exceeded the level is complete and the player progresses to a fresh room with one more atom bouncing in it than in the previous level. There are an infinite number of levels, but from level 49 onwards every level starts with 50 atoms.

The game is controlled by a standard pointing device such as a mouse. Right click alternates between horizontal and vertical orientation for wall creation and left click starts the walls building.

The player begins each level with the same number of lives as there are atoms in that level. The game finishes if all lives are lost.


For high scores it is important to maximize the bonus received in the move that completes each level, by capturing as near as 100% as possible. For example, by completing the first level with 76% of the room captured one receives a bonus of 4,234 points, but if 99% is captured then the bonus is 16,278 - almost four times as much.

A tactic that is effective on higher levels is to intentionally allow an atom to hit one of the walls while it is drawing (thus sacrificing a life) while making sure the wall drawing in the opposite direction reaches an edge, thus creating a wall across part of the room that is easier to complete in a following move.

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