client/client_OLD/views/rules/Baroque/en.pug

   1 p.boxed
   2     | Most pieces look the same but behave very differently.
   3     | They generally move like an orthodox queen,
   4     | but capturing rules are complex.
   5
   6 p
   7     | Note: 'Baroque' is the initial name thought by the author,
   8     | but 'Ultima' is also largely adopted.
   9     a(href="https://www.chessvariants.com/people.dir/abbott.html")
  10         | He prefers 'Baroque'
  11     | , and I think me too.
  12
  13 h3 Specifications
  14
  15 ul
  16     li Chessboard: standard.
  17     li Material: "standard".
  18     li Non-capturing moves: often like queen.
  19     li Special moves: none.
  20     li Captures: very special.
  21     li End of game: standard; see below.
  22
  23 h4 Pieces names
  24
  25 p Pieces names refer to the way they capture, which is described later.
  26 ul
  27     li Pawn : pawn or pincer
  28     li Rook : coordinator
  29     li Knight : long leaper
  30     li Bishop : chameleon
  31     li Queen : withdrawer
  32     li King : king (same behavior as in standard chess)
  33 p.
  34     Besides, a new piece is introduced: the immobilizer, written by the letter 'm'
  35     in FEN diagrams and PGN games. It is represented by an upside-down rook:
  36
  37 figure.diagram-container
  38     .diagram
  39         | fen:8/8/4m3/8/8/8/3M4/8:
  40     figcaption Immobilizers on d2 and e6.
  41
  42 h3 Non-capturing moves
  43
  44 p.
  45     Pawns move as orthodox rooks, and the king moves as usual,
  46     one square in any direction.
  47     All other pieces move like an orthodox queen.
  48
  49 p.
  50     When a piece is adjacent to an enemy immobilizer, it cannot move unless
  51     the enemy immobilizer is adjacent to a friendly immobilizer or chameleon
  52     (cancelling the powers of the opponent's immobilizer).
  53 p
  54     | Note : this corresponds to the "pure rules" described on
  55     a(href="http://www.inference.org.uk/mackay/ultima/ultima.html") this page
  56     | , which slightly differ from the initial rules.
  57     | The aim is to get rid of the weird suicide rule by weakening the immobilizers lock.
  58     | In particular, in the original rules two adjacent immobilizer are stuck forever
  59     | until one is captured. Note that it's still the case if all chameleons disappeared.
  60
  61 h3 Capturing moves
  62
  63 p.
  64     Easy case first: the king captures as usual, by moving onto an adjacent square
  65     occupied by an enemy piece. But this is the only piece following orthodox rules,
  66     and also the only one which captures by moving onto an occupied square.
  67     All other pieces capture passively: they land on a free square and captured
  68     units are determined by some characteristics of the movement.
  69
  70 p Note 1: the immobilizer does not capture.
  71
  72 p.
  73     Note 2: for passive captures, a 'X' is added at the end of the move notation,
  74     to indicate that something was taken (replaying the game is necessary to know where).
  75
  76 h4 Pawns/Pincers
  77
  78 p.
  79     If at the end of its movement a pawn is horizontally or vertically adjacent to an
  80     enemy piece, which itself is next to a friendly piece (in the same direction),
  81     the "pinced" unit is removed from the board.
  82
  83 figure.diagram-container
  84     .diagram
  85         | fen:7k/5ppp/2N5/2n5/3rB3/8/PPP5/K7:
  86     figcaption 1.Pc2c4 captures both coordinator and long leaper.
  87
  88 h4 Coordinators (rooks)
  89
  90 p.
  91     Imagine that rook and king of the same color are two corners of a rectangle
  92     (this works if these two pieces are unaligned).
  93     If at the end of a rook move an enemy piece stands in any of the two remaining
  94     corners, it is captured.
  95
  96 figure.diagram-container
  97     .diagram
  98         | fen:8/2b4K/2q5/3p1N1p/8/8/2R5/k7:
  99     figcaption 1.Rc5 captures on c7 and h5.
 100
 101 h4 Long leapers (knights)
 102
 103 p.
 104     A knight captures exactly as a queen in international draughts game: by jumping
 105     over its enemies, as many times as it can/want but always in the same direction.
 106     In this respect it is less powerful than a draughts' queen:
 107     on the following diagram c8 or f6 cannot be captured.
 108     However, the knight does not have to maximize the number of captured units
 109     (as is the case in draughts).
 110
 111 figure.diagram-container
 112     .diagram
 113         | fen:2n4k/3r4/5b2/3p4/1m6/3b4/3N4/K7 d4,d6,d8,a5:
 114     figcaption All marked squares captures are playable from d2.
 115
 116 h4 Withdrawer (queen)
 117
 118 p.
 119     The queen captures by moving away from an adjacent enemy piece, in the opposite
 120     direction (without jumping, the path must be free).
 121
 122 figure.diagram-container
 123     .diagram
 124         | fen:7k/8/8/3Qr3/8/8/8/K7 a5,b5,c5:
 125     figcaption 1.Qa5, 1.Qb5 or 1.Qc5 captures the black rook.
 126
 127 h4 Chameleon (bishop)
 128
 129 p The chameleon captures pieces in the way they would capture. So, it
 130 ul
 131     li pinces pawns (if moving like a pawn),
 132     li withdraws from withdrawers,
 133     li leaps over long leapers,
 134     li coordinates coordinators.
 135 p ...and these captures can be combined.
 136
 137 p.
 138     Remark: the move indicated on the diagram doesn't capture the black pincer
 139     on e5, since it is a diagonal move (not like a pawn).
 140
 141 figure.diagram-container
 142     .diagram
 143         | fen:7k/8/8/r3pP2/2n5/8/B7/K7 a5,c4:
 144     figcaption 1.Bd5 captures the two marked pieces.
 145
 146 p.
 147     Besides, chameleon immobilizes immobilizers (but cannot capture them since they
 148     do not capture).
 149
 150 p.
 151     A chameleon captures the king in the same way the king captures, which means that
 152     a chameleon adjacent to a king gives check.
 153
 154 h3 End of the game
 155
 156 p.
 157     Checkmate or stalemate as in standard chess. Note however that checks are more
 158     difficult to see, because of the exotic capturing rules. For example, on the
 159     following diagram the white king cannot move to e5 because then
 160     the black pawn could capture by moving next to it.
 161
 162 figure.diagram-container
 163     .diagram
 164         | fen:7k/8/8/p4r/4K3/8/8/8 e5:
 165     figcaption 1.Ke5 is impossible
 166
 167 h3 More information
 168
 169 p.
 170     | A good starting point is the
 171     a(href="https://en.wikipedia.org/wiki/Baroque_chess") Wikipedia page
 172     | , which also gives pointers to other interesting pages (including
 173     | chessvariants.com, as usual).