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<!DOCTYPE html>
<!--
/*
* Chess variant: Edgy Chess
*
* Version: 1.0
* Author: Marc Bernard, 2017-08-01
*
* Copyright(c) 2017-2020. All rights reserved.
*
* http://www.edgychess.com/
*/
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<title>Edgy Chess by Edge and Marc Bernard - Rules</title>
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<p class="center"><img class="board3d" alt="3D View of Edgy Chess Setup" src="images/Edgy_Chess_Setup_3d.png" width="500"/></p>
<h1>Rules for Edgy Chess (tl;dr)</h1>
<p class="center">Turn your board 45 degrees and setup the pieces starting with your king in your corner as shown below:</p>
<p class="center"><img class="board2d" alt="2D View of Edgy Chess Setup" src="images/setup.png"/></p>
<p class="center">Pawns move diagonally forward <i>one</i> step at a time (<img src="images/move-black-small.png" alt="Move"/>)
and capture to the side of their path (<img src="images/capture-black-small.png" alt="Capture"/>).<br/>
Pawns are promoted on the opponents non-pawn fields (<img src="images/promote-white-small.png" alt="Promote"/>).<br/><br/>
Castling is allowed but there is <i>no en passant</i>.<br/><br/>
All other rules are like in classic chess.</p>
<h3>Enjoy!</h3>
</div>
<div class="box">
<h1>Overview</h1>
<p><b>Edgy Chess</b> is a variant of Regular Orthodox Classic Western Chess. It uses the same geometry, same type of
pieces, same number of pieces, castling, an in general the same rules as classic chess. It differs from classic chess
in the initial setup of the board as well as the movement and promotion of Pawns. </p>
<p>This all makes a lot of sense when you see the initial board setup with the corner pointing towards you. The beauty
of this variant is that it can be played with any classic chess board and pieces available in the world and is easy to
learn for anyone who knows how to play chess. It's actually easier to learn than classic chess since there's no en
passant rule. The setup also leads to more aggressive play since opponent pieces are on average a bit closer together.</p>
<p>It looks like chess but it is a new game. Same, same, but different.</p>
</div>
<div class="box">
<h1>Rules</h1>
<p><i>Note: Differences to classic chess are shown in italic.</i></p>
<h2>Setup</h2>
<p><b>Edgy Chess</b> is played on a chessboard, a square board divided into 64 squares (eight-by-eight) of alternating color, which
is like the board used in draughts (checkers). No matter what the actual colors of the board, the lighter-colored
squares are called "light" or "white", and the darker-colored squares are called "dark" or "black". Sixteen "white" and
sixteen "black" pieces are placed on the board at the beginning of the game. <i>The board is placed so that a dark
corner square is in front of each player.</i></p>
<p class="center"><img class="board2d" alt="2D View of Edgy Chess Setup" src="images/setup.png"/>
<label>Setup</label></p>
<p>Each player controls sixteen pieces:</p>
<table>
<thead>
<tr>
<td>Name</td><td>Count</td><td>White Symbols</td><td>Black Symbols</td>
</tr>
</thead>
<tbody>
<tr>
<td class="piecename">King</td>
<td>1</td>
<td><img class="piece" alt="White King" src="images/king-white.png" width="34" height="34"/></td>
<td><img class="piece" alt="Black King" src="images/king-black.png" width="34" height="34"/></td>
</tr>
<tr>
<td class="piecename">Queen</td>
<td>1</td>
<td><img class="piece" alt="White Queen" src="images/queen-white.png" width="34" height="34"/></td>
<td><img class="piece" alt="Black Queen" src="images/queen-black.png" width="34" height="34"/></td>
</tr>
<tr>
<td class="piecename">Rook</td>
<td>2</td>
<td><img class="piece" alt="White Rook" src="images/rook-white.png" width="34" height="34"/></td>
<td><img class="piece" alt="Black Rook" src="images/rook-black.png" width="34" height="34"/></td>
</tr>
<tr>
<td class="piecename">Bishop</td>
<td>2</td>
<td><img class="piece" alt="White Bishop" src="images/bishop-white.png" width="34" height="34"/></td>
<td><img class="piece" alt="Black Bishop" src="images/bishop-black.png" width="34" height="34"/></td>
</tr>
<tr>
<td class="piecename">Knight</td>
<td>2</td>
<td><img class="piece" alt="White Knight" src="images/knight-white.png" width="34" height="34"/></td>
<td><img class="piece" alt="Black Knight" src="images/knight-black.png" width="34" height="34"/></td>
</tr>
<tr>
<td class="piecename">Pawn</td>
<td>8</td>
<td><img class="piece" alt="White Pawn" src="images/pawn-white.png" width="34" height="34"/></td>
<td><img class="piece" alt="Black Pawn" src="images/pawn-black.png" width="34" height="34"/></td>
</tr>
</tbody>
</table>
<p>At the beginning of the game, the pieces are arranged as shown in the diagram. <i>The king is placed in the corner
first. Then the queen, a bishop, a knight, and a rook are placed along the left edge. A bishop, a knight, and a rook are
placed along the right edge. The pawns are placed in front of those pieces (see diagram). The phrases to remember this
setup, are "king in the corner" and "black in front". The latter refers to setting up the board so that the square
closest to each player is black.</i></p>
</div>
<div class="box">
<h1>Play of the Game</h1>
<p>The player controlling the white army is named "White"; the player controlling the black pieces is named "Black".
White moves first, then players alternate moves. Making a move is required; it is not legal to skip a move, even when
having to move is detrimental. Play continues until a king is checkmated, a player resigns, or a draw is declared, as
explained below. In addition, if the game is being played under a time control, then players who exceed their time limit
lose the game.</p>
<h2>Movement</h2>
<h3>Basic moves</h3>
<p>Each chess piece has its own method of movement. Moves are made to vacant squares except when capturing an opponent's
piece.</p>
<p>Apart from any movement of the knight and the occasional castling maneuver, pieces cannot jump over each
other. When a piece is captured (or taken), the attacking piece replaces the enemy piece on its square (<i>en passant
does not exist in Edgy Chess</i>). The captured piece is thus removed from the game and may not be returned to play for
the remainder of the game. The king can be put in check but cannot be captured (see below).<p>
<h4>
<img class="piece" alt="King" src="images/king-white.png" width="34" height="34"/>
King
<img class="piece" alt="King" src="images/king-black.png" width="34" height="34"/>
</h4>
<p>The <span class="piecename">king</span> can move exactly one square horizontally, vertically, or diagonally. Only
once per player, per game, is a king allowed to make a special move known as castling (see below).</p>
<p class="center"><img class="board2d" alt="King" src="images/king.png"/>
<label>King movements</label></p>
<br style="clear: both;">
<h4>
<img class="piece" alt="Rook" src="images/rook-white.png" width="34" height="34"/>
<img class="piece" alt="Rook" src="images/rook-black.png" width="34" height="34"/>
Rooks
<img class="piece" alt="Rook" src="images/rook-black.png" width="34" height="34"/>
<img class="piece" alt="Rook" src="images/rook-white.png" width="34" height="34"/>
</h4>
<p>The <span class="piecename">rook</span> moves any number of vacant squares vertically or horizontally. It also is
moved while castling.</p>
<p class="center"><img class="board2d" alt="Rook" src="images/rook.png"/>
<label>Rook movements</label></p>
<br style="clear: both;">
<h4>
<img class="piece" alt="Bishop" src="images/bishop-black.png" width="34" height="34"/>
<img class="piece" alt="Bishop" src="images/bishop-white.png" width="34" height="34"/>
Bishops
<img class="piece" alt="Bishop" src="images/bishop-white.png" width="34" height="34"/>
<img class="piece" alt="Bishop" src="images/bishop-black.png" width="34" height="34"/>
</h4>
<p>The <span class="piecename">bishop</span> moves any number of vacant squares in any diagonal direction.</p>
<p class="center"><img class="board2d" alt="Bishop" src="images/bishop.png"/>
<label>Bishop movements</label></p>
<br style="clear: both;">
<h4>
<img class="piece" alt="Queen" src="images/queen-black.png" width="34" height="34"/>
Queen
<img class="piece" alt="Queen" src="images/queen-white.png" width="34" height="34"/>
</h4>
<p>The <span class="piecename">queen</span> can move any number of vacant squares diagonally, horizontally, or
vertically.</p>
<p class="center"><img class="board2d" alt="Queen" src="images/queen.png"/>
<label>Queen movements</label></p>
<br style="clear: both;">
<h4>
<img class="piece" alt="Knight" src="images/knight-white.png" width="34" height="34"/>
<img class="piece" alt="Knight" src="images/knight-white.png" width="34" height="34"/>
Knights
<img class="piece" alt="Knight" src="images/knight-black.png" width="34" height="34"/>
<img class="piece" alt="Knight" src="images/knight-black.png" width="34" height="34"/>
</h4>
<p>The <span class="piecename">knight</span> moves to the nearest square not on the same rank, file, or diagonal. In
other words, the knight moves two squares horizontally then one square vertically, or one square horizontally then two
squares vertically. Its move is not blocked by other pieces: it jumps to the new location.</p>
<p class="center"><img class="board2d" alt="Knight" src="images/knight.png"/>
<label>Knight movements</label></p>
<br style="clear: both;">
<h4>
<img class="piece" alt="Pawn" src="images/pawn-black.png" width="34" height="34"/>
<img class="piece" alt="Pawn" src="images/pawn-black.png" width="34" height="34"/>
Pawns
<img class="piece" alt="Pawn" src="images/pawn-white.png" width="34" height="34"/>
<img class="piece" alt="Pawn" src="images/pawn-white.png" width="34" height="34"/>
</h4>
<p><span class="piecename">Pawns</span> have the most complex rules of movement:</p>
<ul>
<li>A pawn can move forward <i>diagonally</i> one square, if that square is unoccupied. <i>It's not allowed to move
pawns two squares from the initial position.</i> A pawn cannot move backwards.</li>
<li>Pawns are the only pieces that capture differently from how they move. They can capture an enemy piece on either of
the two adjacent spaces to the <i>space they are on</i> (i.e., the two squares <i>orthogonally</i> in front of them) but
cannot move to these spaces if they are vacant.</li>
<li>The pawn is also involved in a special move called promotion (see below).</li>
<li><i>Note: En passant is not available.</i></li>
</ul>
<p class="center"><img class="board2d" alt="Pawn" src="images/pawn-move.png"/>
<label>Pawn movements</label></p>
<h4>
<img class="piece" alt="King" src="images/king-white.png" width="34" height="34"/>
<img class="piece" alt="Rook" src="images/rook-white.png" width="34" height="34"/>
Castling
<img class="piece" alt="Rook" src="images/rook-black.png" width="34" height="34"/>
<img class="piece" alt="King" src="images/king-black.png" width="34" height="34"/>
</h4>
<p>Castling consists of moving the king two squares towards a rook, then placing the rook on the other side of the king,
adjacent to it. Castling is only permissible if all of the following conditions hold:</p>
<ul>
<li>The king and rook involved in castling must not have previously moved;</li>
<li>There must be no pieces between the king and the rook;</li>
<li>The king may not currently be in check, nor may the king pass through or end up in a square that is under attack by
an enemy piece (though the rook is permitted to be under attack and to pass over an attacked square);</li>
</ul>
<p class="center"><img class="board2d" alt="Starting Positions for Castling" src="images/castle-from.png"/>
<label>Positions of pieces before castling</label></p>
<p class="center"><img class="board2d" alt="End Positions for Castling" src="images/castle-to.png"/>
<label>Positions of king and rook after queenside (white) and kingside (black) castling</label></p>
<h4>
<img class="piece" alt="Pawn" src="images/pawn-black.png" width="34" height="34"/>
<i>En Passant</i>
<img class="piece" alt="Pawn" src="images/pawn-white.png" width="34" height="34"/>
</h4>
<i>En passant is not available in Edgy Chess.</i>
<h4>
<img class="piece" alt="Pawn" src="images/pawn-white.png" width="34" height="34"/>
Pawn Promotion
<img class="piece" alt="Pawn" src="images/pawn-black.png" width="34" height="34"/>
</h4>
<p>If a pawn advances to a <i>promotion field (see diagram)</i>, it is then promoted (converted) to a queen, rook,
bishop, or knight of the same color, the choice being at the discretion of its player (a queen is usually chosen). The
choice is not limited to previously captured pieces. Hence it is theoretically possible for a player to have up to nine
queens or up to ten rooks, bishops, or knights if all their pawns are promoted. If the desired piece is not
available, the player should call the arbiter to provide the piece.</p>
<p class="center"><img class="board2d" alt="Pawn" src="images/pawn-promo.png"/>
<label>Pawn promotion</label></p>
<p>White pawns promote on squares e8-h8-h4 (marked with white diamonds); black pawns on a5-a1-d1 (marked with black
diamonds). Note that the pawns that start on a6 and h3 cannot promote without moving toward the center of the board via
capturing.</p>
<h2>Check</h2>
<p>A king is in check when it is under attack by one or more enemy pieces. A piece unable to move because it would place
its own king in check (it is pinned against its own king) may still deliver check to the opposing player.</p>
<p class="center"><img class="board2d" alt="Check" src="images/check.png"/>
<label>Black's king is in check. It can get out of check by moving to an unattacked square. Black can also parry
the check by moving the bishop to e5 or the knight to f4 to block the check, or by capturing the white bishop with the knight.</label></p>
<p>A player may not make any move which places or leaves his king in check. The possible ways to get out of check are:</p>
<ul>
<li>Move the king to a square where it is not threatened.</li>
<li>Capture the threatening piece (possibly with the king).</li>
<li>Block the check by placing a piece between the king and the opponent's threatening piece.</li>
</ul>
</div>
<div class="box">
<h1>End of the Game</h1>
<h2>Checkmate</h2>
<p>If a player's king is placed in check and there is no legal move that player can make to escape check, then the king
is said to be checkmated, the game ends, and that player loses. Unlike other pieces, the king is never actually captured
or removed from the board because checkmate ends the game.</p>
<p class="center"><img class="board2d" alt="Checkmate" src="images/checkmate.png"/>
<label>White is checkmated; Black wins</label></p>
<p>The diagram shows a typical checkmate position. The white king is threatened by the black queen; every square to
which the king could move is also threatened; it cannot capture the queen, because it would then be threatened by the
rook.</p>
<h2>Draws</h2>
<p>The game ends in a draw if any of these conditions occur:</p>
<ul>
<li>The game is automatically a draw if the player to move is not in check but has no legal move. This situation is
called a stalemate. An example of such a position is shown in the diagram to the right.</li>
<li>The game is immediately drawn when there is no possibility of checkmate for either side with any series of legal
moves. This draw is often due to insufficient material, including the endgames
<ul>
<li>king against king;</li>
<li>king against king and bishop;</li>
<li>king against king and knight;</li>
<li>king and bishop against king and bishop, with both bishops on diagonals of the same color.</li>
</ul>
</li>
<li>Both players agree to a draw after one of the players makes such an offer.</li>
</ul>
<p class="center"><img class="board2d" alt="Draw" src="images/draw.png"/>
<label>Black to move is in stalemate, since his king has no legal move, and is not in check. The game is drawn.</label></p>
<p>The player having the move may claim a draw by declaring that one of the following conditions exists, or by declaring
an intention to make a move which will bring about one of these conditions:</p>
<ul>
<li>Fifty-move rule: There has been no capture or pawn move in the last fifty moves by each player.</li>
<li>Threefold repetition: The same board position has occurred three times with the same player to move and all pieces
having the same rights to move, including the right to castle or capture en passant.</li>
</ul>
<p>If the claim is proven true, the game is drawn.</p>
<p>At one time, if a player was able to check the opposing king continually (perpetual check) and the player indicated
their intention to do so, the game was drawn. This rule is no longer in effect; however, players will usually agree to a
draw in such a situation, since either the rule on threefold repetition or the fifty-move rule will eventually be
applicable.</p>
</div>
<div class="box">
<h1>Notation</h1>
<p>Since <b>Edgy Chess</b> is using the same board, pieces, and movements as classic chess, all types of
<a href="http://en.wikipedia.org/wiki/Chess_notation" target="_blank">Chess Notation</a> may be used.</p>
<p class="center"><img class="classicboard2d" alt="Edgy Chess Setup" src="images/notation-init.png"/>
<label>Alternative graphic for Edgy Chess setup</label></p>
<p>On this website, we use the player view for showing Edgy Chess boards and pieces. However, as an alternative
graphical presentation of an Edgy Chess game, one can certainly use the traditional graphics for chess.</p>
<p class="center"><img class="classicboard2d" alt="Game of Edgy Chess" src="images/notation-game.png"/>
<label>Graphic of Edgy Chess game</label></p>
</div>
<div class="box">
<h1>Attribution</h1>
<p>Some of the text above was extracted from Wikipedia, under <a href="http://creativecommons.org/licenses/by-sa/3.0/"
target="_blank">Creative Commons Attribution-ShareAlike 3.0 License</a> and adapted to the rules of <b>Edgy Chess</b>.
For more details and references, please access the original articles about the
<a href="http://en.wikipedia.org/wiki/Rules_of_chess" target="_blank">Rules of Chess</a> and
<a href="http://en.wikipedia.org/wiki/Legan_chess" target="_blank">Legan Chess</a>.</p>
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