US 20070296149 A1
A method for playing a two-level chess game on apparatus comprising, upper and lower spaced apart congruent traditional chess boards with traditional sets of chessmen positioned for chess play respectively on the first two rows of opposing sides of the lower chess board, where the method includes the steps of transcending and descending a playing piece from a square on one board to a congruent transfer square on the other board and optionally moving the transferred playing piece from the transfer square to a move ending square whose maximum distance from the transfer square is a selected fraction of the number of squares the playing piece would be authorized to move without having been transcended or descended, not counting the transfer square.
1. A method for playing a two-level chess game on apparatus comprising,
upper and lower spaced apart congruent chess boards each having a grid of eight by eight alternating contrasting squares in files and ranks, with each square defining a playing piece position,
a first force and a second force of chess playing pieces, each including a king, a queen, two bishops, two knights, two rooks and eight pawns, and adapted to be positioned for chess play respectively on the first two rows of opposing sides of the lower chess board, where the method includes the steps of,
transcending and descending a playing piece from a square on one board to a congruent transfer square on the other board and optionally moving the transferred playing piece from the transfer square to a move ending square whose maximum distance from the transfer square is a selected fraction of the number of squares the playing piece would be authorized to move without having been transcended or descended, not counting the transfer square.
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The present invention relates to improvements in the game of chess related to making the traditional two dimensional game into a game played on two superimposed and spaced apart traditional chess boards.
The game of chess has a long history. It was about 500 years ago that the queen and bishop took their modern moves, thus creating the modern game. Although the other pieces had taken on their modern moves centuries before, the queen and bishop had been weak pieces that slowed the pace and reduced the tactics of the game. In medieval chess the queen moved only one square diagonally, so it could reach only 32 squares at a slow pace. The medieval chess bishop could leap over pieces like a knight, and like the knight moved exactly two steps; but unlike the knight, it moved its two steps diagonally. In the late 15th century, the queen suddenly gained a huge increase in power, as it was given its modern far-ranging move. The bishop trebled in power by receiving its modern move, thereby becoming the rough equal of the knight. Both these changes occurred at the same time, so that a dynamic new Renaissance chess emerged as a rival to the traditional medieval game.
Even more modern changes to the game have been suggested by recent inventors who have added a third dimension to the game by introducing additional game boards and additional chessmen. For example, a Military Game featuring upper and lower superimposed chess boards, conventional chessmen and a set of small airplanes positioned in the squares of the upper board was the subject of the 1932 patent to Weaver, U.S. Pat. No. 1,877,154. Brennan disclosed a Multiple-Board Chess Game with Additional Chessmen in U.S. Pat. No. 3,937,471 in 1976. In the Brennan game two sets of conventional chessmen were set up on a lower board while two sets of additional chessmen were set up on an opposing upper board. U.S. Pat. No. 5,031,917 to Greene for Three Dimensional Chess Game featured eight similar 64 square chess boards with one set of chessmen initially arranged in normal fashion on one side of the topmost board while the other set of chessmen was arranged in normal fashion on the lowermost board on the side opposite to the chessmen on the top board. A second row of pawns was provided for each set. The pieces are moved as in a regular game of chess except that moves can be made both vertically and horizontally with the proviso that a piece cannot be moved both fore or aft and up and down in the same move. Mardirosian's U.S. Pat. No. 5,556,099, issued in 1996 discloses a three-dimensional chess game with role-static pieces and role-altering pieces, including helicopters and planes. U.S. Pat. No. 5,826,880 for Multi-level Chess Game with Additional Chess Pieces, issued to Cooper in 1998, discloses a multi-level chess game with an odd-numbered plurality of chessboards and at least one pair of supplemental sets of chessmen in addition to the normal two sets.
While all of these games are challenging, the extra pieces required for their play represents a significant departure from the traditional game of chess, requiring a player to learn many additional rules and substantially altering the age old forms of play.
Accordingly, it is the object of the present invention to provide a chess game that incorporates the airborne aspect of modern warfare into the conventional ground based chess game, but at the same time preserving the traditional rules of chess with the established two sets of chessmen.
A second object of the invention is to provide the game of chess with an arial feature that requires only a minimal number of additional rules to those of the standard single plane chess game.
Other and further objects, features and advantages of the present invention will be apparent upon a reading of the following detailed description of the present invention, taken in conjunction with the accompanying drawings.
The present inventive improvement to the game of chess involves a method for playing a two-level chess game on apparatus comprising upper and lower spaced apart congruent chess boards each having a grid of eight by eight alternating contrasting squares in files and ranks, with each square defining a playing piece position. A first force and an opposing second force is represented in the game by two conventional sets of chess playing pieces (chessmen), each set including a king, a queen, two bishops, two knights, two rooks and eight pawns. Each set of chessmen is initially positioned for play in the traditional manner on the first two rows of opposing sides of the lower chess board. The inventive aspect of the improved chess game involves the concept of optionally transcending one or more of the chessmen to the upper board or descending upper board pieces to the lower board. The transcending and descending moves require a small number of additional rules with respect to each of the chessmen, but the end game of checkmate of the opposing King remains the same, with the additional feature that check and checkmate of a King positioned on one board is possible by the opponent's chessmen on the other board.
Referring first to
The object of the improved game is to introduce a three dimensional element to the game of chess where the normal two sets (each set 14 and 16 representing one of two opposing forces) of chessmen are moved in their traditional manner on the ground (lower board 9) but may also may be made to move in the air (on the upper board 11). Movement of playing pieces on both the lower and upper boards follow the traditional chess rules including the restriction that, except for the Knight, a playing piece cannot jump over members of the same force or members of the opposing force. In modern warfare however it is expected that ground fighting elements such as infantrymen, tanks and guns will be airlifted over friendly forces on the ground, as well as the fighting elements of the opposing force, to go behind the line of battle. This concept is carried out in the two-level chess game of the present invention by permitting any of the chessmen on the lower board to transcend to the upper board where, after the transcending move, they can move traditionally. Playing pieces on the airborne board 11 may also descend to the ground battle on the lower board 9. As with traditional chess, capture of an opponent's playing piece is made by moving an opposing piece onto the square occupied by the piece to be captured.
The provision of transcending and descending moves requires only three additional rules to those already established for playing single board chess. First, the transfer of a playing piece from one level to another must be made at the beginning of the move. The transfer cannot be made at the end of the move, just as ground troops would not move across the battle field and then be transported into the air. The second rule is more arbitrary, but important to serve the necessary limitations on airborne moves. As part of the transfer move, either up or down, the playing piece is restricted in its further board movement to some fraction of the number of squares permitted by the standard rules of chess. In the preferred form of the invention that is disclosed in the following examples, the fraction is one half. Third, with the exception of a transfer move by a Knight, the transfer square cannot be occupied by a playing piece of the same force.
A first example is diagramed in
As shown in
Similarly, as seen in
On their first move, pawns 30 can ordinarily move two squares forward in the file on which they were initially positioned, as shown in
The King 20 may be transcended or descended at any time, for example from G1 to g9, as shown in
Under standard chess rules a Knight moves in an L direction one or two squares to a leg. On a transfer move the Knight still moves in an L direction, but only one square to a leg. As shown in
After a transcending or descending move, with its above stated limitations, the movement of the playing pieces are governed by the traditional rules of chess. For example, if a file, rank or diagonal is clear of playing pieces on the upper board an already transcended Queen may move any number of spaces in that lane even if the congruent spaces on the lower board are occupied with pieces representing either friendly or opposing forces, as already referred to with respect to the illustration of
Except for transcending or descending moves of a Knight, an opposing piece occupying a transfer square may be captured on the transfer move. For example, as seen in
Any move of a playing piece after the transfer move, either on the upper or lower board, is governed by the standard rules of chess. The King of one force may be put in check or checkmate by the pieces of the other force on the same board as the one on which the King is positioned or by pieces of the opposing force positioned on the other board, or a combination of the two.
Any pawn which reaches the eighth row distant from its starting position, whether on the upper or lower board, may be exchanged for any playing piece except for the King.