diff --git a/puzzle.c b/puzzle.c
index 17ac4764148b868ffcbf98ca05af6dfac1a39ed4..2a79bd664d49f2036778e95cc4dc706e503af06c 100644
--- a/puzzle.c
+++ b/puzzle.c
@@ -37,3 +37,54 @@ Dimensions calculer_dimensions(uint64_t piece) {
     dim.hauteur = max_row - min_row + 1;
     return dim;
 }
+
+//Normaliser (ramener la pièce en haut à gauche)
+uint64_t normaliser(uint64_t piece) {
+    if (piece == 0) return 0;
+    int min_r = 8, min_c = 8;
+
+    for (int r = 0; r < 8; r++) {
+        for (int c = 0; c < 8; c++) {
+            if (piece & BIT(r, c)) {
+                if (r < min_r) min_r = r;
+                if (c < min_c) min_c = c;
+            }
+        }
+    }
+
+    uint64_t res = 0;
+    for (int r = 0; r < 8; r++) {
+        for (int c = 0; c < 8; c++) {
+            if (piece & BIT(r, c)) {
+                res |= BIT(r - min_r, c - min_c);
+            }
+        }
+    }
+    return res;
+}
+
+//Rotation 90°
+uint64_t rotation_90(uint64_t piece) {
+    uint64_t res = 0;
+    for (int r = 0; r < 8; r++) {
+        for (int c = 0; c < 8; c++) {
+            if (piece & BIT(r, c)) {
+                res |= BIT(c, 7 - r);
+            }
+        }
+    }
+    return normaliser(res);
+}
+
+//Miroir
+uint64_t miroir_horizontal(uint64_t piece) {
+    uint64_t res = 0;
+    for (int r = 0; r < 8; r++) {
+        for (int c = 0; c < 8; c++) {
+            if (piece & BIT(r, c)) {
+                res |= BIT(r, 7 - c);
+            }
+        }
+    }
+    return normaliser(res); 
+}