** **** CHESS PIECES IN THE LOTUS ENVIRONMENT **** Copyright (c) 1998 by david moeser **** ** TABLE OF CONTENTS ================= CHAPTER :I: INTRODUCTION ========================= 1.0 Overview 2.0 General Information 2.1 Chess Variants Information 3.0 Algebraic Notation 3.1 Note About Squares CHAPTER :II: CHESS PIECES ========================== A1.0 Alfil A1.1 Sample Alfil Moves A2.0 Alfilrider A2.1 Sample Alfilrider Move A3.0 Archbishop A3.1 Sample Archbishop Move B1.0 Bishop B1.1 Sample Bishop Move C1.0 Colonel C1.1 Sample Colonel Moves C2.0 Counselor C3.0 Crook C3.1 Sample Crook Move D1.0 Dabbaba D1.1 Possible Dabbaba Cells D1.2 Sample Dabbaba Moves E1.0 Enhanced-Rook E1.1 Sample Enhanced-Rook Move F1.0 Ferz F1.1 Sample Ferz Moves F1.2 Ferz: Historical Note G1.0 General G1.1 Sample General Moves H1.0 Haxxaba H1.1 Possible Haxxaba Cells H1.2 Sample Haxxaba Moves H2.0 Hexrider K1.0 King K1.1 Sample King Move K1.2 More Sample King Moves K2.0 Knight K2.1 Sample Knight Move L1.0 Lotusrider L1.1 Sample Lotusrider Move L2.0 Lotussa L2.1 Sample Lotussa Move O1.0 Orthodonter O1.1 Possible Orthodonter Cells O1.2 Sample Orthodonter Moves O2.0 Ouroboros O2.1 Sample Ouroboros Move P1.0 Pawn P1.1 Pawn Movement P1.2 Special Pawn Movement Situations P1.2.1 Hexagons P1.2.2 Deadends P1.3 Pawn Capturing P1.4 Special Pawn Capturing Situations P1.4.1 Same Rank P1.4.2 Deadends P1.5 Pawn Promtion Q1.0 Queen Q1.1 Sample Queen Move R1.0 Rook R1.1 Sample Rook Move S1.0 Squeen S1.1 Sample Squeen Move W1.0 Wazir W1.1 Sample Wazir Moves W2.0 Wyvern W2.1 Sample Wyvern Move CHAPTER :I: INTRODUCTION ========================= 1.0 OVERVIEW ============= Lotus-39 is a chess game played on a lotus board consisting of 39 squares, called cells. The rules of the game are substantially the same as Regular Chess. Except for one piece, Lotus-39 uses estab- lished chess pieces used in the present or past in Regular Chess, and the movements of the pieces are as analogous to the concepts of Regu- lar Chess as possible. A regular chess set can be used. 2.0 GENERAL INFORMATION: VERSION 0.6 ===================================== Lotus-39 Chess was invented by David Moeser of Cincinnati, Ohio, USA, in June 1998 for submission in the 1998 Chess Variants Contest. This article is being published as of November 30, 1998, along with other articles detailing additional aspects of Lotus Chess. Titles included in this set are: 1. LOTUS-39 CHESS. Rules for playing the game. (See file for Version 1.0) 2. THE LOTUS BOARD: NOTATION & DIRECTIONAL CONCEPTS. Details on these subjects: * Notation for the lotus board. * Vectors and directional concepts. * Orthogonality and superorthogonality. * Patterns and pathways for movement of pieces: rows, ranks, files, diagonals, lotus paths, lotus circles, and other patterns. * Other aspects of the board, such as the color scheme used on actual boards. (See file for Version 1.2) 3. CHESS PIECES IN THE LOTUS ENVIRONMENT. This article, which explains and illustrates the rules for movement of more than two dozen chess pieces as used on the lotus board. Note: At the present time, this file includes details only for pieces used in traditional or Modern Lotus-39. Version 1.0 will have details on other pieces derived from traditional or variants concepts. (Note added by Hans Bodlaender: This 1.0 version of this file is also available from this website. Click on this sentence.) 2.1 CHESS VARIANTS INFORMATION =============================== Interested chessplayers may contact the inventor at the internet e-mail address: erasmus at iglou dot com. NEUE CHESS: THE BOOK, a compilation of more than 50 pages published in Cincinnati chess periodicals on the subject of chess variants, is available from the author for US $5. (U.S.A. addresses only. Correspondents outside the U.S. should contact the author for shipping cost.) The world capital of chess variants is located on the web at: http://www.chessvariants.com/index.html. 3.0 ALGEBRAIC NOTATION ======================= ______ /\ e7 /\ 7 / d7 \/ f7 \ /\ / \ /\ /_c7_\/ \/_g7_\ 6 | c6 | e6 | g6 | |____| |____| /\ c5 /\ /\ g5 /\ 5 / b5 \/ d5 \ / f5 \/ h5 \ /\ / \ /\ / \ /\ /_a5_\/ \/_e5_\/ \/_i5_\ 4 | a4 | c4 | e4 | g4 | i4 | |____| |____| |____| \ a3 /\ /\ e3 /\ /\ i3 / 3 \/ \ / \/ \ / \/ \ b3 /\ d3 / \ f3 /\ h3 / \/_c3_\/ \/_g3_\/ 2 | c2 | e2 | g2 | |____| |____| \ c1 /\ /\ g1 / \/ \ / \/ 1 \ d1 /\ f1 / \/_e1_\/ a b c d e f g h i An easy way to remember the notation system is to note that the central rank is the fourth rank, and the central file is the 'e' file. 3.1 NOTE ABOUT SQUARES ======================= In this article, the word "square" refers ONLY to square-shaped cells. It is NOT to be considered synonymous with "cell." CHAPTER :II: CHESS PIECES ========================== A1.0 ALFIL =========== The predecessor of the modern Bishop, the Alfil was a standard piece in the first thousand years of Regular Chess. As on a regular 8x8 board, the Alfil moves along diagonals, jumping over the adjacent cell in any direction to the next (triangular) cell. On the lotus board the Alfil moves on the triangle cells of diagonals. The Alfil moves ONLY on the triangles, but it can reach all 16 tri- angular cells, or 41% of the board. The Alfil is a (0,2) leaper, leaping over any piece occupying the intermediate cell between the cell the Alfil is on and the triangle the Alfil moves to. The Alfil is NOT a rider; the Alfil moves only one triangle along a diagonal on each move. Compare: Alfilrider; Bishop; Wyvern. In practical use, a "bishop" piece may be used to represent an Alfil. Such usage is historically correct. DIAGRAM A1-1: SAMPLE ALFIL MOVES ================================ ______ /\ o /\ 7 / \/ \ /\ / \ /\ /____\/ \/_A2_\ 6 | | | | |____| |____| /\ o /\ /\ o /\ 5 / \/ \ / \/ \ /\ / \ /\ / \ /\ /_x__\/ \/_x__\/ \/_x__\ 4 | | | | | | |____| |____| |____| \ /\ /\ A1 /\ /\ / 3 \/ \ / \/ \ / \/ \ /\ / \ /\ / \/_x__\/ \/_x__\/ 2 | | | | |____| |____| \ /\ /\ / \/ \ / \/ 1 \ /\ / \/_x__\/ a b c d e f g h i In Diagram A1-1 above, Alfil "A1" on e3 can move to any of six tri- angles (marked "x"). Alfil "A2" on f7 can move to any of three tri- angles (marked "o"). C2.0 COUNSELOR =============== The Counselor is a nonroyal King. In other words, it has the same move as a King, but as a piece is not royal. This is a generic con- cept in the field of chess variants and goes by various names. (If a game is being played where some other piece is already called a Coun- selor, this piece could alternatively be called a "Chief of staff.") For examples of the Counselor's move, see Diagrams K1.1 and K1.2. The Counselor can reach all 39 cells, or 100% of the board. The Coun- selor is a (0,1) rider. This piece was invented in 1998 by David Moeser of Cincinnati, Ohio, USA. C3.0 CROOK =========== The Crook is a stronger version of the Rook, adding true Y-axis files to the Rook's move. Thus the Crook is a rider that can move to any cell along X-axis or Z-axis orthogonal lines, or along Y-axis superorthogonal lines. The Crook is a rider, so it can be blocked by other material occu- pying cells along its lines. The Crook is an Orthodonter-rider plus a Wazir-rider, or in other words, an orthogonal and super-orthogonal line-rider. The Crook is not defined as a Rook plus an Alfilrider be- cause the Crook does not move along the W-axis. The Crook can potentially reach all 39 cells, or 100% of the board, but some of those cells are deadends from which the only way to exit is to go backwards in the direction it came from. The Crook was in- vented in 1998 by David Moeser of Cincinnati, Ohio, USA. Compare: En- hanced-Rook; Orthodonter; Rook; Wazir. In practical use, a "rook" piece may be used to represent a Crook. DIAGRAM C3-1: SAMPLE CROOK MOVE =============================== ______ /\ /\ 7 / x \/ \ /\ / \ /\ /____\/ \/_x__\ 6 | | x | x | |____| |____| /\ /\ /\ x /\ 5 / \/ \ / x \/ x \ /\ / \ /\ / \ /\ /____\/ \/____\/ \/____\ 4 | x | x | x | CROOK | x | |____| |____| |____| \ /\ /\ /\ /\ / 3 \/ \ / \/ x \ / x \/ \ /\ / \ /\ / \/____\/ \/_x__\/ 2 | | x | | |____| |_x__| \ /\ /\ x / \/ x \ / \/ 1 \ /\ / \/____\/ a b c d e f g h i In Diagram C3-1 above, the Crook on g4 can move to any of 18 cells (marked "x"). F1.0 FERZ ========== The predecessor of the modern Queen, the Ferz was a standard piece in the first thousand years of Regular Chess. As on a regular 8x8 board, the Ferz moves to any contiguous square adjoining at a corner the square it's on. On the lotus board the Ferz moves only on the squares of the lotus paths. Unlike the Alfil (which moves on diago- nals), the Ferz does not leap over hexagons (which would be a leap along the Z-file to a non-contiguous square). The square the Ferz moves to must be contiguous. The Ferz moves ONLY on the squares, but it can reach all 19 square cells, or 49% of the board. The Ferz is a (0,2) leaper along a lotus path of squares only. It leaps around any piece occupying the inter- mediate triangle between the square the Ferz is on and the square it moves to. The Ferz is NOT a rider; it moves only one cell along a half-lotus path on each move. Compare: Alfil; General. In practical use, an upside-down "rook" piece, or an extra piece from another set of a different size or design, may be used to repre- sent a Ferz. (Use of a "queen" piece to represent a Ferz would be historically correct, and some players may prefer to do that. How- ever, a "queen" piece is suggested for representing a Lotussa since its movement along lotus rows makes the Lotussa apparently the most powerful piece in the game of traditional Lotus-39.) DIAGRAM F1-1: SAMPLE FERZ MOVES =============================== ______ /\ /\ 7 / \/ \ /\ / \ /\ /____\/ \/____\ 6 | | | x | |____| |____| /\ /\ /\ /\ 5 / \/ x \ / F1 \/ x \ /\ / \ /\ / \ /\ /____\/ \/____\/ \/____\ 4 | | | x | | | |____| |____| |____| \ /\ /\ /\ /\ / 3 \/ \ / \/ \ / \/ \ /\ / \ /\ / \/____\/ \/____\/ 2 | | | o | |____| |____| \ /\ /\ / \/ o \ / F2 \/ 1 \ /\ / \/____\/ a b c d e f g h i In Diagram F1-1 above, Ferz "F1" on f5 can move to any of four squares (marked "x"). Ferz "F2" on f1 can move to any of two squares (marked "o"). F1.2 FERZ: HISTORICAL NOTE =========================== A note about the spelling: According to Murray, the spelling "fers" is essentially a Middle English (and Russian) Europeanization of another, earlier Europeanization, "ferz," which was taken from the Arabic "firz" (firzAn). In general, "fers" connoted a female piece, modeled on the European system of royalty. "The name 'Queen,'" says Murray, "is a characteristically European innovation. ... The name has reacted curiously on the borrowed name 'fers,' and has everywhere al- tered the gender." Murray traces the Arabic "firzAn" to the Middle Persian "farzIn." Before reaching Europe, the game of chess throve for many centuries in the Arabic-speaking Moslem world, where the "firz" was a male advisor (wise man or counselor) to the King, not a female consort. The monumental work, A HISTORY OF CHESS, has been the definitive history of the game in English since its publication by H.J.R. Murray in 1913. In modern times the book has been reissued by Benjamin Press, Box 112, Northampton, Massachusetts 01061, USA. See pages 26 and 423-427. K1.0 KING ========== As on a regular 8x8 board, the King moves one cell in any direc- tion. The King moves to any contiguous cell; that is, to any cell sharing a side or corner with the cell it's on. The King can move onto any cell, so it can reach all 39 cells, or 100% of the board. The King is a (0,1) rider. DIAGRAM K1-1: SAMPLE KING MOVE ============================== ______ /\ /\ 7 / \/ \ /\ / \ /\ /____\/ \/____\ 6 | | | | |____| |____| /\ /\ /\ /\ 5 / \/ x \ / x \/ \ /\ / \ /\ / \ /\ /____\/ \/_x__\/ \/____\ 4 | | x |KING| x | | |____| |____| |____| \ /\ /\ x /\ /\ / 3 \/ \ / x \/ x \ / \/ \ /\ / \ /\ / \/____\/ \/____\/ 2 | | | | |____| |____| \ /\ /\ / \/ \ / \/ 1 \ /\ / \/____\/ a b c d e f g h i In Diagram K1-1 above, the King on e4 can move to any of eight cells (marked "x"). DIAGRAM K1-2: MORE SAMPLE KING MOVES ==================================== ______ /\ o /\ 7 / K3 \/ o \ /\ / \ /\ /_o__\/ \/____\ 6 | o | o | | |____| |____| /\ /\ /\ /\ 5 / \/ \ / \/ \ /\ / \ /\ / \ /\ /____\/ \/____\/ \/____\ 4 | | | x | | | |____| |____| x |____| \ /\ /\ x /\ /\ / 3 \/ \ / x \/ \ / \/ \ /\ / \ K2 /\ x / \/____\/ \/_x__\/ 2 | | x | x | |____| |____| \ /\ /\ / \/ \ / \/ 1 \ /\ / \/____\/ a b c d e f g h i In Diagram K1-2 above, King "K2" on f3 can move to any of 8 cells (marked "x"); King "K3" on d7 can move to any of 5 cells (marked "o"). When a King occupies a hexagon it can move to any of the 12 cells of the surrounding lotus ring. K2.0 KNIGHT ============ As on a regular 8x8 board, the Knight leaps over the ring of cells surrounding the cell it's on, landing on a non-contiguous cell. On the lotus board the Knight moves only on hexagons. Its move can be viewed as moving orthogonally along the Z-axes, leaping over the adja- cent square to the hexagon of any immediately interlocking lotus petal. The Knight moves only on hexagons, so it can reach only 4 cells, or 10% of the 39-cell board. The Knight is a (0,2) leaper along ortho- gonal lines only. DIAGRAM K2-1: SAMPLE KNIGHT MOVE ================================ ______ /\ /\ 7 / \/ \ /\ / \ /\ /____\/ \/____\ 6 | | | | |____| |____| /\ /\ /\ /\ 5 / \/ \ / \/ \ /\ / \ /\ / \ /\ /____\/ \/____\/ \/____\ 4 | | x | | x | | |____| |____| |____| \ /\ /\ /\ /\ / 3 \/ \ / \/ \ / \/ \ /\ / \ /\ / \/____\/ \/____\/ 2 | | KNIGHT | | |____| |____| \ /\ /\ / \/ \ / \/ 1 \ /\ / \/____\/ a b c d e f g h i In Diagram K2-1 above, the Knight on e2 can move to either c4 or g4 (marked "x"). It cannot move to e6 because the lotus petal sur- rounding e6 isn't contiguous (i.e., doesn't interlock) with the lotus petal surrounding the e2 cell. Also, to reach e6 the Knight would not be leaping orthogonally along a Z-axis, and it would not be leaping over only one intermediate cell to reach e6. L1.0 LOTUSSA ============= The Lotussa is a lotus-rider with a scope of three cells along any lotus path (wavy row) which the cell it's on is part of. It can po- tentially reach all cells except the hexagons, or a total of 35 cells (90% of the board). It never moves onto hexagons. The Lotussa was invented in 1998 by David Moeser of Cincinnati, Ohio, USA. It's defined as a lotus-rider with a range of 3-cells. In practical use, a "queen" piece may be used to represent a Lo- tussa. Players should bear in mind, of course, that when so used the piece is NOT a Queen and doesn't have the Queen's move. If this causes confusion, an upside-down "rook" piece or a piece from a set of a different size or design may be used to represent the Lotussa. (See note in Section F1.0.) DIAGRAM L1-1: SAMPLE LOTUSSA MOVE ================================= ______ /\ /\ 7 / \/ \ /\ / \ /\ /____\/ \/____\ 6 | | | | |____| |____| /\ /\ /\ /\ 5 / \/ \ / \/ \ /\ / \ x /\ x / \ /\ /____\/ \/_x__\/ \/____\ 4 | | | x | | | |____| |____| |____| \ /\ /\ LO /\ /\ / 3 \/ \ / x \/ x \ / \/ \ x /\ / \ /\ x / \/_x__\/ \/_x__\/ 2 | x | | x | |____| |____| \ /\ /\ / \/ \ / \/ 1 \ /\ / \/____\/ a b c d e f g h i In Diagram L1-1 above, the Lotussa on e3 can move to any of the 12 cells along lotus pathways (marked "x"). The triangle cells serve as branching points, allowing the Lotussa's line of movement to "fork" at those cells onto different lotus petals. However, since the Lotussa is a rider, it can be blocked by other material occupying a cell along its path. For example, if another piece were on c3, this Lotussa on e3 would be blocked from the cells b3 and c2 and would exert no influ- ence over b3 or c2 whatsoever. Similarly, if another piece were on d3, this Lotussa would exert no power over b3, c3, or c2. P1.0 PAWN ========== Generally speaking, as in Regular Chess the Pawn moves one cell forward (that is, one rank forward) on its file but does NOT capture the same way it moves. As in Regular Chess the Pawn can be blocked from forward movement. And true to the spirit of Regular Chess, there are many complications! P1.1 PAWN MOVEMENT =================== 1. When a Pawn is on a square or triangle of a Y-axis file (a - c - e - g - i), it moves one cell forward along the Y-axis file. That is, it must move "straight ahead" toward the opponent, or super- orthogonally on the Y-axis. 2. From squares in the oblique dimension of the hypothecated 'b', 'd', 'f', and 'h' files, the Pawn moves one cell forward on the Z-axis onto the hexagon. Notice that all such squares are located on the Z-files, so this rule boils down to a prescription that when a Pawn is located on a square cell of a Z-file and the only "forward" movement toward the opponent's side is on the Z-file, then that's the direction the Pawn must move in. 3. From hexagons the Pawn has a choice of moving one cell for- ward on the Y-axis file or one cell forward on the Z-axis file. P1.2 SPECIAL PAWN MOVEMENT SITUATIONS ====================================== 1. HEXAGONS. Up to three Pawns of the same color may occupy a home hexagon in the initial position at the start of the game. This is the only situation in Lotus Chess where more than one piece may occupy a cell. 2. DEADENDS. If a Pawn reaches a cell which is a deadend, so that none of the rules for movement in Section P1.1 can be applied to allow the Pawn to move forward, then that Pawn is allowed to move "forward," one cell per move, along the W-axis until it reaches a Y-axis file or a promotion cell. In this case "forward" is defined as toward the 'e' file (center). Note that this rule authorizes movement but NOT capturing along the W-axis -- unless such capturing is allowed under other rules. Hope- fully, giving specific examples will eliminate any possible confusion: (1) If a White Pawn reaches a5 or i5 (or a3 or i3 for Black), it may move from that deadend cell to b5 or h5, respectively (b3 or h3 for Black). It may also capture on those squares because that would be a normal capturing move, anyway. (2) If a White Pawn reaches b5 or h5 (or b3 or h3 for Black), it may move to c5 or g5, respectively (c3 or g3 for Black). However, it may not capture on those triangle cells. See Section P1.4.1 for rules governing capturing by Pawns reaching b5 or h5 for White (or b3 or h3 for Black). P1.3 PAWN CAPTURING ==================== In general, the Pawn's capturing move is similar to Regular Chess in that it may capture in a forking style on either cell to the left or right on the next rank in a forward direction. Specific rules for applying this principle are as follows: 1. From a square on a Y-axis file, the Pawn may capture left or right to either square adjoining the triangle immediately in front of it on the next rank. In other words, the Pawn may capture on either of the Z-file squares of the next rank (toward the opponent) contiguous with the Pawn's own square. 2. From a "backward"-pointing triangle (i.e., pointing toward the player's own side, superorthogonally) on a Y-axis file, the Pawn may capture to the adjoining hexagon on the next rank. One such tri- angle, on the 'e' file, has two such possible captures (to both left and right); but on the 39-cell board, all other such triangles are in edge situations and only one hexagon is in range for a possible cap- ture (analogous to the situation of the "Rook file" in Regular Chess). 3. From a forward-pointing triangle (i.e., pointing toward the opponent's side, superorthogonally) on a Y-axis file, the Pawn may capture left or right to either adjacent square of the SAME rank. 4. From a Z-axis square, the Pawn may capture left or right to either contiguous square adjoining the frontal or forward corners of the square the Pawn is on. One such square is denoted as being on the next rank, but the other such square is technically on the same rank. 5. From a hexagon, the Pawn may capture left or right to either contiguous square one rank forward on the Z-axes, or left or right to either of the contiguous forward-pointing triangles one rank forward on the adjacent Y-axis files. A Pawn on a hexagon thus has four possible capturing cells! P1.4 SPECIAL PAWN CAPTURING SITUATIONS ======================================= 1. DEADENDS. See Section P1.2.2 for details of pawn movement onto "deadend" cells. If a White Pawn reaches b5 or h5 (or b3 or h3 for Black), it may capture on the contiguous square of the next rank forward (i.e., toward the opponent's side). (For example, a White Pawn on b5 may capture on c6, or a Black Pawn on h3 may capture on g2.) While this may seem an odd rule, in actuality it's easily justi- fied. If the board were bigger, consisting of more lotus petals, such a capturing square would exist and be seen as available for a regular, z-axis-type capture. Also, an analogous capturing situation can be visualized with other squares on the hypothecated 'd' and 'f' files: For example, a White Pawn moving from d3 to d4 can capture on e4; this capturing movement is the same directionally as a White Pawn capturing from b5 to c6. 2. HOME HEXAGON. When an opposing piece captures onto a play- er's home hexagon containing multiple Pawns, it captures all Pawns occupying that hexagon. Note: There are only two pieces in the traditional Lotus-39 game that can make such a capture, and furthermore, it's unlikely to hap- pen. The home hexagon must be empty in order for a player to bring a Knight into the game or to get a Rook into action; by that time the opponent's home hexagon is unlikely to still have multiple Pawns on it. 3. There is no "en passant" capturing. P1.5 PAWN PROMOTION ==================== Pawns promote on the last rank -- that is, on the opponent's (wavy) back rank. Pawns may promote only to pieces that exist in the ini- tial position at the start of the game. In other words, in a game of traditional Lotus-39, Pawns may not promote to Bishops or Queens even tho those are standard pieces in Regular Chess. However, in a game of Modern Lotus-39, Pawns may pro- mote to Crooks, Wyverns, or Counselors (as well as Knights or Lotus- sas, of course), since those pieces are in each player's initial army in that game. R1.0 ROOK ========== As on a regular 8x8 board, the Rook can move to any cell on any orthogonal line that includes the cell the Rook is on. On the lotus board the Rook can move to any cell along X-axis or Z-axis lines. The Rook moves ONLY on squares or hexagons, but potentially it can reach all 19 squares and all four hexagons for a total of 23 cells, or 59% of the board. The Rook is a rider along orthogonal lines, so it can be blocked by other material occupying cells on those lines. The Rook is defined as a wazir-rider or orthogonal row-rider. The Rook never reaches the triangle cells, so it cannot affect pieces occupying triangles. Also, some squares are deadends, from which the only way to exit is to go "backwards" in the direction it came from. Compare: Crook; Enhanced-Rook; Wazir. DIAGRAM R1-1: SAMPLE ROOK MOVE ============================== ______ /\ /\ 7 / \/ \ /\ * / \ /\ /____\/ \/____\ 6 | | | | |____| * |____| /\ /\ /\ /\ 5 / \/ \ / \/ \ /\ / \ /\ * / \ * /\ /____\/ \/____\/ \/____\ 4 | | | | | | |_*__| * |_*__| ROOK |_*__| \ /\ /\ /\ /\ / 3 \/ \ / \/ \ / \/ \ /\ / \ * /\ * / \/____\/ \/____\/ 2 | | | | |____| * |____| \ /\ /\ / \/ * \ / \/ 1 \ /\ / \/____\/ a b c d e f g h i In Diagram R1-1 above, the Rook on g4 can move to any of the 12 cells (marked "x") along the 4th rank or the two Z-files. The Rook is most powerful when stationed on hexagons! The Rook can be consid- ered as mainly a Z-axis rider; it must move to a hexagon in order to exert any power over an X-axis rank. W2.0 WYVERN ============ The Wyvern can be viewed as either an enhanced Alfilrider or as a weakened Bishop. The Wyvern is a rider along all cells of the V-axis and W-axis only. Like a Bishop in Regular Chess, it moves only in "oblique" directions, covering all cells of the "diagonals" with its VW-axis movement. Unlike the Alfilrider and Bishop on the lotus board, the Wyvern does not move in the Y-axis direction. The Wyvern is a VW-axis-rider; as a rider it can be blocked by other material occupying cells on its lines. It can reach all cells except the 7 squares on the X-axis ranks, for a total of 32 cells, or 82% of the board. The Wyvern was invented in 1998 by David Moeser of Cincinnati, Ohio, USA. Compare: Alfilrider; Bishop. In practical use, a "bishop" piece may be used to represent a Wyvern. DIAGRAM W2-1: SAMPLE WYVERN MOVE ================================ ______ /\ /\ 7 / \/ \ /\ / \ /\ /____\/ \/____\ 6 | | | | |____| |____| /\ /\ /\ x /\ 5 / \/ \ / x \/ \ /\ / \ /\ / \ /\ /_x__\/ \/_x__\/ \/____\ 4 | | WYVERN | | | | |____| |____| |____| \ x /\ /\ x /\ /\ / 3 \/ \ / \/ \ / \/ \ /\ / \ x /\ / \/____\/ \/__x_\/ 2 | | | | |____| |____| \ /\ /\ / \/ \ / \/ 1 \ /\ / \/____\/ a b c d e f g h i In Diagram W2-1 above, the Wyvern on c4 can move to any of 8 cells (marked "x"). [Version 0.6, published November 30, 1998.]

Written by David Moeser (c).

This is part of a submission to the contest to design a chess variant on a board with 39 squares.

This version of the description of the pieces of Lotus Chess deals only with the regular pieces. There is also a description, that contains more information, including information on many non-standard pieces.

A hardcopy printout of the four main files dealing with Lotus Chess is available from the author for US $14.95 (includes shipping cost to U.S. addresses only). "Lotus Chess: The Book" is spiral-bound and also contains a full-sized, full-color board for use in playing the game. For address information, contact inventor David Moeser by e-mail at: erasmus at iglou dot com.

WWW page created: December 7, 1998. Last modified: January 4, 1999.