prob. finished the pseudocode in main.c

src/chess.h

@@ -18,9 +18,35 @@
 #define BOARD_HORIZONTAL 8
 #define BOARD_VERTICAL 8
 
-// just a simple type abstraction
+// type abstractions
 typedef int board_t[BOARD_HORIZONTAL][BOARD_VERTICAL];
 
+typedef enum {
+    NONE,
+    PAWN,
+    ROOK,
+    KNIGHT,
+    BISHOP,
+    QUEEN,
+    KING
+} piece_e;
+
+typedef struct {
+    int x;
+    int y;
+} pos_t;
+
+typedef enum { WHITE, BLACK } player_e;
+
+typedef struct {
+    // what
+    // where from
+    // where to
+    piece_e piece;
+    pos_t from;
+    pos_t to;
+} move_t;
+
 // the default arrangment of pieces on the board
 #define BOARD_DEFAULT_CONFIG \
 {\
@@ -33,6 +59,11 @@ typedef int board_t[BOARD_HORIZONTAL][BOARD_VERTICAL];
     {2,3,4,5,6,4,3,2}\
 }
 
+typedef enum {
+    CHECKMATE,
+    STALEMATE
+} end_condition_e;
+
 // initializes the board with the default configuration of pieces
 bool init_board(board_t *board);