diff --git a/puzzle.h b/puzzle.h
new file mode 100644
index 0000000000000000000000000000000000000000..ebd3004a87177edbc066395ccc5bd8c7298d0f43
--- /dev/null
+++ b/puzzle.h
@@ -0,0 +1,43 @@
+#ifndef PUZZLE_H
+#define PUZZLE_H// PUZZLE_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#define GRID_ROWS 8
+#define GRID_COLS 8
+#define BIT(row, col) (1ULL << ((row) * 8 + (col)))
+
+/* --- PIECES --- */
+#define PIECE_1   (BIT(0,0) | BIT(0,1) | BIT(0,2) | BIT(1,1) | BIT(2,1))
+#define PIECE_2   (BIT(0,1) | BIT(0,2) | BIT(1,0) | BIT(1,1))
+#define PIECE_3   (BIT(0,1) | BIT(0,2) | BIT(1,0) | BIT(1,1) | BIT(1,2))
+#define PIECE_4   (BIT(0,0) | BIT(0,1) | BIT(0,2) | BIT(1,0) | BIT(2,0))
+#define PIECE_5   (BIT(0,0) | BIT(0,1) | BIT(1,0) | BIT(2,0) | BIT(2,1))
+#define PIECE_6   (BIT(0,0) | BIT(1,0) | BIT(2,0) | BIT(3,0) | BIT(3,1))
+#define PIECE_7   (BIT(0,0) | BIT(1,0) | BIT(2,0) | BIT(2,1))
+#define PIECE_8   (BIT(0,0) | BIT(0,1) | BIT(1,1) | BIT(2,1) | BIT(2,2))
+#define PIECE_9   (BIT(0,0) | BIT(0,1) | BIT(1,1) | BIT(1,2) | BIT(1,3))
+#define PIECE_10  (BIT(0,0) | BIT(0,1) | BIT(0,2) | BIT(0,3))
+
+typedef struct {
+    int largeur;
+    int hauteur;
+} Dimensions;
+
+typedef struct {
+    uint64_t plateau_de_depart;
+    uint64_t* catalogue;
+    int id_piece_depart;
+} ThreadArgs;
+
+/* --- Prototypes des fonctions --- */
+uint64_t genererGrilleDeJeu(void);
+Dimensions calculer_dimensions(uint64_t piece);
+uint64_t normaliser(uint64_t piece);
+uint64_t rotation_90(uint64_t piece);
+uint64_t miroir_horizontal(uint64_t piece);
+bool trouverPremiereCaseVide(uint64_t plateau, int *r, int *c);
+void placeAutoPiecerec(uint64_t plateau, uint64_t* catalogue, uint16_t pieces_utilisees, int* nb_solutions, int piece_forcee);
+
+#endif