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Templates

The game uses two main templates to represent the board state and display pieces.

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casilla Template

Defines the structure of each square on the chess board. 
(deftemplate casilla
  "Define la estructura de las casillas de un tablero de ajedrez"

  ;El campo fila contendrá el número de fila de la casilla
  (slot fila (type NUMBER))

  ;El campo columna contendrá el número de fila de la casilla
  (slot columna (type NUMBER))

  ;El campo valor contendrá el identificador de una casilla
  (multislot valor (type NUMBER))
)

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Template Slots

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fila
NUMBER
required
Row number of the square (1-8)
​
columna
NUMBER
required
Column number of the square (1-8)
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valor
NUMBER multislot
required
Identifier for the square’s content:
  • 0 - White square (empty)
  • 1 - Black square (empty)
  • 4 - Square with mouse
  • 5 1 - Square with cat #1
  • 5 2 - Square with cat #2
  • 5 3 - Square with cat #3
  • 5 4 - Square with cat #4
The valor slot uses a multislot to store both the piece type (5 for cat) and the cat’s ID number.

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pieza Template

Defines the visual representation of pieces for console display. 
(deftemplate pieza
  "Estructura de las piezas a imprimir por pantalla.
   Cada casilla internanmente consta de un espacio de 3x3 por ello se usan 3 partes"

  ;Campo para enlazar el valor de casilla con la pieza a imprimir por pantalla
  (slot valor)

  ;Contiene la primer parte a imprimir de una pieza
  (slot parte1)

  ;Contiene la segunda parte a imprimir de una pieza
  (slot parte2)

  ;Contiene la tercera parte a imprimir de una pieza
  (slot parte3)
)

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Template Slots

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valor
NUMBER
required
Links to the casilla valor field (0, 1, 4, or 5)
​
parte1
STRING
required
First line of the ASCII art representation (7 characters wide)
​
parte2
STRING
required
Second line of the ASCII art representation (7 characters wide)
​
parte3
STRING
required
Third line of the ASCII art representation (7 characters wide)

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Initial Facts

The hechos-iniciales deffacts establishes the initial game state. 
(deffacts hechos-iniciales
  "Declaracion de hechos iniciales"

  ;Hecho de control para ingresar el tablero sin piezas.
  (ingresar-tablero)

  ;Hecho para controlar la impresion del tablero.
  (imprime 1 1)

  ;Hecho para definir que parte de la regla se debe imprimir.
  (parteImprimir 1)

  ;Hecho de control para actualizar la impresion del tablero.
  (actualizar-tablero)

  ; Visual representations for each piece type...
)

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Control Facts

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ingresar-tablero
fact
Triggers the rule to initialize the blank board (all 64 squares)
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imprime
fact (row col)
Controls which square is currently being printed. Starts at (1 1)
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parteImprimir
fact (part)
Indicates which part (1-3) of the piece ASCII art to print
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actualizar-tablero
fact
Triggers the board rendering rule

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Piece Visual Definitions

Each piece type has an associated visual representation:

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White Square (valor 0)

(pieza
  (valor 0)
  (parte1 "       ")
  (parte2 "       ")
  (parte3 "       ")
)

​
Black Square (valor 1)

(pieza
  (valor 1)
  (parte1 " . . . ")
  (parte2 " . . . ")
  (parte3 " . . . ")
)

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Mouse (valor 4)

(pieza
  (valor 4)
  (parte1 "(_)_(_)")
  (parte2 " (o o) ")
  (parte3 "==\\o/==")
)
Visual: 
(_)_(_)
 (o o) 
==\o/==

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Cat (valor 5)

(pieza
  (valor 5)
  (parte1 " /\\_/\\ ")
  (parte2 "( o.o )")
  (parte3 " > ^ < ")
)
Visual: 
 /\_/\ 
( o.o )
 > ^ <

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Board Representation

The board is an 8x8 checkerboard where:
  • Rows: Numbered 1-8 (bottom to top)
  • Columns: Numbered 1-8 (left to right)
  • Only black squares are playable (like checkers)
  • Initial Setup:
    • Mouse starts at row 1, column 4
    • Four cats start at row 8 on black squares (columns 1, 3, 5, 7)
The game uses a standard chess board layout where only the dark squares are used, similar to checkers.

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