variants/Baroque/complete_rules.html

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   3   <title>Baroque Rules</title>
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   9 <div class="full-rules">
  10 <h1>Baroque Rules</h1>
  11
  12 <div>
  13   <h4>Pieces names</h4>
  14   <p>Pieces names refer to the way they capture, which is described later.</p>
  15   <ul>
  16     <li>Pawn : Pawn or Pincer</li>
  17     <li>Rook : Coordinator</li>
  18     <li>Knight : Long Leaper</li>
  19     <li>Bishop : Chameleon</li>
  20     <li>Queen : Withdrawer</li>
  21     <li>King : King (same behavior as in standard chess)</li>
  22   </ul>
  23   <p>
  24     There is also a new piece : the immobilizer,
  25     represented by an upside-down rook.
  26   </p>
  27   <figure>
  28     <div class="diag"
  29          data-fen='8/8/4m3/8/8/8/3M4/8 w 0'>
  30     </div>
  31     <figcaption>Immobilizers on d2 and e6.</figcaption>
  32   </figure>
  33 </div>
  34
  35 <div>
  36   <h3>Non-capturing moves</h3>
  37   <p>
  38     Pawns move as orthodox rooks, and the king moves as usual,
  39     one square in any direction.
  40     All other pieces move like an orthodox queen.
  41   </p>
  42   <p>
  43     When a piece is adjacent to an enemy immobilizer, it cannot move unless
  44     the enemy immobilizer is adjacent to a friendly immobilizer or chameleon
  45     (cancelling the powers of the opponent's immobilizer).
  46   </p>
  47   <p>
  48     Note : this corresponds to the "pure rules" described on
  49     <a href="http://www.inference.org.uk/mackay/ultima/ultima.html">
  50       this page
  51     </a>
  52     , which slightly differ from the initial rules.
  53     The aim is to get rid of the weird suicide rule by weakening the
  54     immobilizers lock. In particular, in the original rules two adjacent
  55     immobilizer are stuck forever until one is captured. Note that it's still
  56     the case if all chameleons disappeared.
  57   </p>
  58 </div>
  59
  60 <div>
  61   <h3>Capturing moves</h3>
  62   <p>
  63     Easy case first: the king captures as usual, by moving onto an adjacent
  64     square occupied by an enemy piece. But this is the only piece following
  65     orthodox rules, and also the only one which captures by moving onto an
  66     occupied square. All other pieces capture passively: they land on a free
  67     square and captured units are determined by some characteristics of the
  68     movement.
  69   </p>
  70   <p>Note: the immobilizer does not capture.</p>
  71
  72   <h4>Pawns/Pincers</h4>
  73   <p>
  74     If at the end of its movement a pawn is horizontally or vertically adjacent
  75     to an enemy piece, which itself is next to a friendly piece (in the same
  76     direction), the "pinced" unit is removed from the board.
  77   </p>
  78   <figure>
  79     <div class="diag"
  80          data-fen='7k/5ppp/2N5/2n5/3rB3/8/PPP5/K7 w 0'>
  81     </div>
  82     <figcaption>1.Pc2c4 captures both coordinator and long leaper.</figcaption>
  83   </figure>
  84
  85   <h4>Coordinators (rooks)</h4>
  86   <p>
  87     Imagine that rook and king of the same color are two corners of a rectangle
  88     (this works if these two pieces are unaligned).
  89     If at the end of a rook move an enemy piece stands in any of the two
  90     remaining corners, it is captured.
  91   </p>
  92   <figure>
  93     <div class="diag"
  94          data-fen='8/2b4K/2q5/3p1N1p/8/8/2R5/k7 w 0'>
  95     </div>
  96     <figcaption>1.Rc5 captures on c7 and h5.</figcaption>
  97   </figure>
  98
  99   <h4>Long leapers (knights)</h4>
 100   <p>
 101     A knight captures exactly as a queen in international draughts game: by
 102     jumping over its enemies, as many times as it can/want but always in the
 103     same direction. In this respect it is less powerful than a draughts' queen:
 104     on the following diagram c8 or f6 cannot be captured.
 105     However, the knight does not have to maximize the number of captured units
 106     (as is the case in draughts).
 107   </p>
 108   <figure>
 109     <div class="diag"
 110          data-fen='2n4k/3r4/5b2/3p4/1m6/3b4/3N4/K7 w 0'
 111          data-marks='d4,d6,d8,a5'>
 112     </div>
 113     <figcaption>All marked squares captures are playable from d2.</figcaption>
 114   </figure>
 115
 116   <h4>Withdrawer (queen)</h4>
 117   <p>
 118     The queen captures by moving away from an adjacent enemy piece, in the
 119     opposite direction (without jumping, the path must be free).
 120   </p>
 121   <figure>
 122     <div class="diag"
 123       data-fen="7k/8/8/3Qr3/8/8/8/K7 w 0"
 124       data-marks="a5,b5,c5">
 125     </div>
 126     <figcaption>1.Qa5, 1.Qb5 or 1.Qc5 captures the black rook.</figcaption>
 127   </figure>
 128
 129   <h4>Chameleon (bishop)</h4>
 130   <p>The chameleon captures pieces in the way they would capture. So, it</p>
 131   <ul>
 132     <li>pinces pawns (if moving like a pawn),</li>
 133     <li>withdraws from withdrawers,</li>
 134     <li>leaps over long leapers,</li>
 135     <li>coordinates coordinators.</li>
 136   </ul>
 137   <p>...and these captures can be combined.</p>
 138   <p>
 139     Remark: the move indicated on the diagram doesn't capture the black pincer
 140     on e5, since it is a diagonal move (not like a pawn).
 141   </p>
 142   <figure>
 143     <div class="diag"
 144       data-fen="7k/8/8/r3pP2/2n5/8/B7/K7 w 0"
 145       data-marks="a5,c4">
 146     </div>
 147     <figcaption>1.Bd5 captures the two marked pieces.</figcaption>
 148   </figure>
 149   <p>
 150     Besides, chameleon immobilizes immobilizers (but cannot capture them since
 151     they do not capture).
 152   </p>
 153   <p>
 154     A chameleon captures the king in the same way the king captures, which
 155     means that a chameleon adjacent to a king gives check.
 156   </p>
 157 </div>
 158
 159 <div>
 160   <h3>End of the game</h3>
 161   <p>
 162     The game ends by checkmate or stalemate as in standard chess. Note however
 163     that checks are more difficult to see, because of the exotic capturing
 164     rules. For example, on the following diagram the white king cannot move to
 165     e5 because then the black pawn could capture by moving next to it.
 166   </p>
 167   <figure>
 168     <div class="diag"
 169          data-fen="7k/8/8/p4r/4K3/8/8/8 w 0"
 170          data-marks="e5">
 171     </div>
 172     <figcaption>1.Ke5 is impossible</figcaption>
 173   </figure>
 174 </div>
 175
 176 <div>
 177   <h3>More information</h3>
 178   <p>
 179     The
 180     <a href="https://en.wikipedia.org/wiki/Baroque_chess">Wikipedia page</a>
 181     is a good starting point.
 182   </p>
 183 </div>
 184
 185 </div>
 186
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