The present invention relates to chess games and, more specifically, to a chess variant and method of play thereof.
The game of chess is well-known, dating back several hundred years by most accounts. Conventional chess is a two-player game played on a chessboard having sixty-four alternating black and white squares comprising eight horizontal rows called ranks, and eight vertical columns called files. In conventional chess, each player begins the game with sixteen movable game pieces as follows: one King (K), one Queen (Q), two Rooks (R), two Bishops (B), two Knights (Kn) and eight Pawns (P). The object of conventional chess is to “checkmate” the opposing player's King, i.e., to place the King in a position such that he cannot escape being captured in the subsequent move. Each player's pieces are initially positioned in a predetermined opposed and mirrored relation to his opponent's pieces, with his Pawns occupying his second rank and the remaining pieces occupying his first rank. The players alternate turns by moving any one of their pieces to a different square on the chess board according to predefined movement rules. A player captures his opponent's pieces during a turn by moving his piece into a square occupied by one of the opponent's pieces. The rules associated with conventional chess are well known and are generally outlined in U.S. Pat No. 20060113728A1 to Budden, U.S. Pat. No. 5,735,523 to Fioriglio and U.S. Pat. No. 5,690,334 to Duke, which are hereby incorporated in their entirety by reference.
By rule, each game piece in classical chess has limitations placed upon its movement. For example, the King generally may move one square in any direction (e.g. orthogonally or diagonally) to an unobstructed square. The Queen may move through any number of unobstructed squares in any straight line (e.g. orthogonally or diagonally). The Queen may not jump other pieces. The Rook may move orthogonally through any number of unobstructed squares in a straight line. The Rook may not jump other pieces. The Bishop may move through any number of unobstructed squares in any straight diagonal line. The Bishop may not jump other pieces. The Knight makes a move which consists of a first one-square step in an orthogonal direction and a second one-square step diagonally away from his original position. The Knight may jump other pieces to arrive at his destination. With the following two exceptions, the Pawn may only move forward one square provided his path is unobstructed, that is, if an opponent's piece in not placed in his intended direction of travel. First, on its initial move, the Pawn may move forward one or two squares. Second, the Pawn may move one square diagonally forward if he captures an opponent's piece.
It should be noted that in conventional chess, other variant moves are permitted under limited circumstances, such as “castling” moves and “en passant” capture moves. Castling involves the simultaneous movement of the King and the Rook. Several castling moves are known. For example, in one castling move the King moves horizontally along a row two squares inward toward the Rook, and the Rook moves horizontally over and beyond the King to the next adjacent square in that row. An en passant capture is a move executed by the Pawn in which the Pawn attacks an opposing Pawn, the opposing Pawn having just been advanced two squares from its original square in one move. In such circumstances, the attacking Pawn may move diagonally one square into the square passed over by the opposing Pawn and capture the Pawn.
In addition to classical chess, many alternative versions of chess have developed throughout the years. For example, U.S. Pat. No. 6,702,287 to Pendexter and U.S. Pat. No. 6,481,716 to Trice discloses exemplary variations on conventional chess. However, these prior art chess variants require a non-standard sized chess board to accommodate new pieces. Thus, a player is usually required to carry the non-standard sized chess board to the locale at which he wishes to play. Thus, it is desirable to provide a chess variant that may utilize traditionally-sized chessboards, while maintaining interesting and effective playability.
Although non-standard sized boards offer enhanced playability, the games pieces and set of rules for a particularly sized board are applicable only to that board and may not be ported to boards of other sizes or configurations. Thus, once a player becomes familiar with the underlying rules of the chess variant corresponding to a board of a given size, the rules and game-play knowledge acquired by playing that chess variant is inapplicable to other chess variants. This is often a stumbling block, requiring the player to learn new rules and strategies for other chess variants, as opposed to building upon his existing experience and knowledge. Thus, it is desirable to provide a chess variant that maintains a closely related underlying set of rules and game pieces that may be applied to both a traditional chess board as well as various non-standard sized boards.
Additionally, a need exists to minimize the complexity and learning curve of the chess variant that is sought to be played, thereby increasing the appeal of the chess variant to a wider audience. Furthermore, although prior art chess variants are playable, they may not necessarily be played strategically, as the players are not aware of the value and strength of each new piece in relation to the non-standard board size or configuration. Thus, prior art chess variants are not fully optimized to encompass more strategic levels of game-play.
In the past, many chess variants introduced new pieces whose rules are a combination of the moves of standard chess pieces, rendering them more powerful than most of the standard pieces. This reduces the playability or the strategic depth of the variant, as the pieces provide too many avenues of attack, reduce the tactical importance of Pawns, or minimize the negative overall effect of the capture of pieces whose moves to which the new pieces are derived. This was the case in a variant commonly referred to as Capablanca Chess, invented in the early 20th century, in which the two new pieces, the Chancellor and the Archbishop combined the moves of the a Rook and a Knight and a Bishop and a Knight, respectively, thus tipping the strategic balance of the game towards these powerful new pieces.
As shown, a need exists for a new and improved chess variant that is a logical extension of ordinary or conventional chess but utilizes new pieces in conjunction with standard or non-standard sized chess boards to provide new challenges to conventional opening moves, capture strategies, promotions, etc.
A chess variant includes (a) one of an 8 by 8 board, a 8 by 10 board, or a 10 by 10 board; (b) a conventional chess piece set; and (c) a novel non-conventional chess piece set, wherein the pieces of the non-conventional chess piece set perform non-standard movements with rules associated therewith to govern how the pieces move and capture upon the board. Additionally, the set of rules governing how the rules of movement for the piece can undergo a change when a non-conventional chess piece reaches the furthest rank, akin to the process of promotion in standard chess. The movement and capture rules associated with a new separate chess piece include many subvariants as described herein.
The foregoing is a summary and thus contains, by necessity, simplifications, generalizations and omissions of detail; consequently, those skilled in the art will appreciate that the summary is illustrative only and is not limiting in any way. Other aspects, inventive features, and advantages of the devices and/or processes described herein will become apparent in the non-limiting detailed description set forth herein.
Reference will now be made in detail to background examples and some embodiments of the invention, examples of which are illustrated in the accompanying drawings.
The present invention introduces a new approach to ordinary or conventional chess gaming by implementing, generally, a new piece and its corresponding movement, capture strategies, and graduative rules associated therewith.
The inventor has discovered that a more strategic and interesting chess variant emerges when a new piece is introduced whose movement rules render it less powerful than standard pieces, rather than more powerful than standard pieces. This keeps the combinatorics of the additional move permutations in check, as well as maintains the strategic balance and tactics of the standard pieces that are used in the variant.
As with conventional chess, the game is played on a board of alternate colored tiles 100 as shown in
The rules of movement for a Squire are shown diagrammatically in
A further aspect of the movement rules of the Squire is that while its strategic value is relatively low as an offensive piece due to its limited range and capture rules, its weakness is compensated by its strength as a defensive piece. The reason for this is that by moving two squares across a row or column of the piece it is defending, it can maintain the defense of said piece. This aspect of the Squire could, for example, be used to strongly stabilize Pawn islands or permit a Knight to more easily retain a centralized position in the game.
Another novel aspect of the Squire is that there are potentially two different categories of the orthogonal movement of two squares. For the first type, the move of two squares orthogonally is accomplished what may be described as a march. Like a pawn, a marching move can be blocked by another piece if it is placed directly in the path of two-square move, that is, orthogonally adjacent to the Squire in the direction of the intended move. Furthermore, for this move, it is possible to introduce a rule to allow the Squire to be captured en passant by another piece or pawn. The second type of orthogonal moves is that of a jump, much like a Knight. In this case it can move two squares regardless of its adjacent neighbors. It is useful to make a titular distinction between the two, wherein the former case the Squire is denoted as a Dismounted Squire, and in the latter as a Mounted Squire, or perhaps more simply as a Squire (mounted) or a Knave (dismounted). It is anticipated that in practice the simpler single word appellation of the latter will garner more widespread use. For the purpose of precision, however, this document will use Squire to be inclusive of both Mounted and Dismounted Squires.
A third novel aspect of the Squire is that, like a Pawn, it is possible to introduce a rule by which only a predetermined subset of a move template belongs to capturing moves. Capturing moves are defined as moves that are allowed only if another piece is captured, as opposed to positional moves, which are defined as moves wherein another piece is not captured. It should not be construed that the set of allowable capturing moves for the Squire are disjoint from the set of positional moves. Indeed, for all (non-pawn) pieces in standard chess, the template of allowable capturing moves is identical to positional moves. For Pawns, the templates are disjoint, with diagonal moves being capturing and forward moves being positional.
For the Squire, a novel approach is taken such that the set of positional and capturing moves need not be either identical or mutually disjoint. In one embodiment, all eight positional moves are permitted while only allowing the four diagonal capturing moves. In this embodiment, diagonal moves can be either positional or capturing. In another embodiment, only the four orthogonal moves are positional while the four diagonal moves are capturing. In this embodiment, a diagonal move is only allowed if an opponent's piece is captured. The effect of allowing diagonal moves to be both positional and capturing provides the Squire with greater mobility, giving the piece greater relative strategic strength than if the diagonal moves were only capturing. Because the basic template for the movement of the Squire has eight potential moves, there are many potential subsets of positional and capturing moves. Clearly, because there are eight potential moves for the Squire, it is not expedient to list all of the potential restrictions on capturing and positional moves that the combinatorics allow; however, a subset of sensible restrictions on a standard set of moves will likely improve the strategic impact of the Squire in the chess variant.
A final novel aspect of the Squire is that, like a Pawn, it has a rule governing a process that is not unlike promotion. For the purposes of clarity, this process is named graduation, thereby distinguishing it from the process of promotion in classical chess. Like a Pawn, graduation occurs when the Squire reaches the final rank. Unlike a Pawn, however, the process of graduation does not replace the Squire with another piece; rather, it changes the Squire's type from Dismounted to Mounted Squire, thereby indicating a change in capturing rules, positional movement rules, or both. One way to designate the occurrence of graduation is to provide designs consisting of two pieces that are similar in shape. For example, in the nominal design of the Squire, the piece is roughly the height of a Rook, but similar in shape with the Pawn. There are two design aspects of the piece, shown in
Nevertheless, due to the aspect of the Squire that places him on light or dark squares for the entire game, and given that only two squires are generally allowed in a game, it is straightforward to keep track of the Squire that has been promoted from a Dismounted to a Mounted Squire. If, however, Pawns are permitted to be promoted to Squires, then a visual distinction would be required to make the game playable as it would potentially allow more than two types of Squires.
This aspect of graduation also permits another variant of the movement of the Dismounted Squire. In such a variant, the Dismounted Squire is forbidden from moving backward. Only upon graduation to a Mounted Squire is he permitted backward motion. Essentially, this eliminates two diagonal and one orthogonal move option from the Dismounted Squire. It also affects the strategy of progressing toward a graduation. If the Dismounted Squire starts the game in the second rank, alongside the Pawns, then it requires three forward moves for the piece to be promoted on a standard 8 by 8 board. If, in this configuration, the Dismounted Squire makes a capture by a diagonal move and capturing moves are disjoint from positional moves, he will not be able to be promoted until he captures an additional time. In other words, in an embodiment where diagonal capturing moves are disjoint from positional moves, an even number of captures are a necessary condition for its graduation if the Dismounted Squire starts in the second rank. This is another aspect in which the Squire's Chess variant allows for greater strategic depth, not by permitting a wider range of moves, but rather, by restricting them.
Another graduation rule, similar to the one above, permits a change in the rules governing the means of the orthogonal motion of the Squire. In one embodiment, for example, before graduation, the Dismounted Squire's orthogonal moves are limited to a march; however, after graduation the Mounted Squire orthogonal moves become a jump.
A further graduation rule pertains to the scope of graduation. In one embodiment, a Squire graduates only if he reaches the final rank. This type of graduation is referred to as a specific graduation. In other embodiment, if one of a player's Squire reaches the final rank, all of his Squires graduate from that point onward. This type of graduation is referred to as universal. Here again, the difference in the graduation scope greatly affects the strategy of the play. If the graduation is universal, a Squire is more likely to be sacrificed at the final rank if another Squire is in a position where the difference in his tactical strength as a dismounted versus mounted Squire is critical to the outcome of the game.
Yet another graduation rule, similar to the one above, can be embodied not by changing the rules of motion upon graduation from a Dismounted to a Mounted Squire, but rather the capture rules. In one embodiment the Dismounted Squire direction for which captures are permitted could be limited to only diagonal moves before graduation, whereas upon graduation the Mounted Squire could be permitted to capture for any move.
One final variant of play with the Squires is to permit its initial position to be randomized. If the Squire's initial position is in the first rank, then, as in Fischer Random chess, its initial position can be randomized with the other pieces, provided that the two Squires are on squares of opposite color. If, however, the Squire's initial position is on the second rank, then the variant would the Squire's initial position would be randomized on the second rank, with the only restriction that the two Squires are on squares of opposite color. Randomizing the Squires initial position on the second rank may or may not be accompanied with randomization of the pieces on the first rank.
In the description above we have noted a number of subvariants within the play given the movement template of the Squire: 1) capturing move restrictions, 2) jumping vs marching in the orthogonal two-square move, 3) graduation from one type of Squire to another upon arrival at the final rank, i.e., from a Mounted Squire to a Dismounted Squire, 4) the ability to capture and be captured en passant, 5) the ability for a Pawn to be promoted to a Mounted Squire, 6) the restriction of the motion of a Dismounted Squire to non-backward motion until graduation, 7) the change of the orthogonal movement type (marching to jumping) of a Dismounted Squire upon graduation, 8) the change of the capture rules of a Dismounted Squire to include orthogonal capture upon graduation, 9) rules involving randomization of the Squires position on both the first and second rank. It should not be construed by this description of the play that all these aspects must be active in a game of Squire's Chess. Any combination of these subvariants may be employed. It is anticipated that over time, a set of norms for these 9 potential variants will be standardized as to optimize both the strategic balance and the relative simplicity of the game. Examples of two combinations of these subvariants are as follows.
In one embodiment, the initial board is set up as a standard game using a standard 8 by 8 chess board. Two Dismounted Squires 401 replace two Pawns directly in front of the Bishops, as depicted in
In another embodiment, the initial board is set up using 10 by 10 or a 10 by 8 chess board. The second rank for both players contains only Pawns. The ordering of the first rank follows much as standard chess with a gap between the Bishop and the Knight filled with a Mounted Squire 501, e.g., R-Kn-Sq-B-K-Q-B-Sq-Kn-R, as shown in
One area in which the field of chess has seen significant growth has been online and computer-assisted chess playing. Many websites devoted to chess play, news, and analysis have been founded. These websites not only permit online players to play against one another, but also to play against computational engines these websites employ to act as an opponent. For many of these websites, there already exist options to play not just standard chess but a variety of chess variants. It is envisioned that the chess variant described herein could be one such variant that online sites provide to their users. It could be implemented by the apparatus described in
Although certain specific embodiments are described above for instructional purposes, the teachings of this patent document have general applicability and are not limited to the specific embodiments described above. Accordingly, various modifications, adaptations, and combinations of various features of the described embodiments can be practiced without departing from the scope of the invention as set forth in the claims.
The present application for patent claims priority under 35 U.S.C. § 119 from U.S. provisional patent application Ser. No. 62/939,656, filed Nov. 24, 2019, the subject matter of which is incorporated herein by reference in its entirety.
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Number | Date | Country | |
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20210154567 A1 | May 2021 | US |
Number | Date | Country | |
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62939656 | Nov 2019 | US |