diff --git a/Makefile b/Makefile
index 80de5a6..867ffa6 100644
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,7 @@ SRCS = $(SRCDIR)/main.c \
 	   $(SRCDIR)/utils/utils.c \
 	   $(SRCDIR)/utils/init.c \
 	   $(SRCDIR)/utils/debug.c \
+	   $(SRCDIR)/parsing/check_map.c \
 
 INCS = $(INCDIR)/parsing.h \
 	   $(INCDIR)/cub.h \
diff --git a/cub3d b/cub3d
index 660c7d5..e85885a 100755
Binary files a/cub3d and b/cub3d differ
diff --git a/includes/cub.h b/includes/cub.h
index 9375c66..cfafdc9 100644
--- a/includes/cub.h
+++ b/includes/cub.h
@@ -18,7 +18,8 @@ typedef struct s_data
 //////utils/////
 //utils
 void    ft_error(char *message);
-void free_char_array(char **array);
+void    free_char_array(char **array);
+int     ft_arrlen(char **arr);
 //init
 int init_data(t_data *data, char *path);
 void free_data(t_data *data);
diff --git a/includes/messages.h b/includes/messages.h
index 97b4559..dc6648b 100644
--- a/includes/messages.h
+++ b/includes/messages.h
@@ -20,7 +20,12 @@
 #define ERROR_INIT_PARS "Initialization of the parsing structure failed."
 #define ERROR_EMPTY "You have provided an empty file."
 #define ERROR_COL "The RGB values provided are not valid."
-
+#define ERROR_NULL_P "Player not found or multiple players."
+#define ERROR_BAD_CHAR "Invalid character in map."
+#define ERROR_POS "Player position not found."
+#define ERROR_ALLOC "Allocation failed."
+#define ERROR_PLAYER "Player not found or multiple players."
+#define ERROR_CHAR "Invalid character in map."
+#define ERROR_NOT_CLOSE "Map is not closed by walls."
 #define DEBUG "test"
-
 #endif
\ No newline at end of file
diff --git a/includes/parsing.h b/includes/parsing.h
index c1c46a6..9714ac9 100644
--- a/includes/parsing.h
+++ b/includes/parsing.h
@@ -36,6 +36,7 @@ typedef struct s_data_parsing
      char **raw_map;
      int    fd_map;
      int    fd_map_dup;
+     int    player[3];
 }    t_data_parsing;
 
 //parsing
@@ -69,4 +70,7 @@ int get_rgb_values(char *line, int rgb[3]);
 //check_colors
 int check_colors(t_textures *texture);
 int is_rgb(int  color[3]);
+
+// check_mao
+int validate_map(char **map, int *player);
 #endif
\ No newline at end of file
diff --git a/libft/libft.a b/libft/libft.a
index e187b83..e7c4b91 100644
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diff --git a/libft/obj/ft_atoi.o b/libft/obj/ft_atoi.o
index ca72c3c..3049d5c 100644
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diff --git a/libft/obj/ft_atoll.o b/libft/obj/ft_atoll.o
index 37c372c..a13c20a 100644
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diff --git a/libft/obj/ft_bzero.o b/libft/obj/ft_bzero.o
index be086ff..cba45f1 100644
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diff --git a/libft/obj/ft_calloc.o b/libft/obj/ft_calloc.o
index de633bf..ee13491 100644
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diff --git a/libft/obj/ft_isalnum.o b/libft/obj/ft_isalnum.o
index 121d636..6f856ee 100644
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diff --git a/libft/obj/ft_isalpha.o b/libft/obj/ft_isalpha.o
index ae2efe8..249afe4 100644
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diff --git a/libft/obj/ft_isascii.o b/libft/obj/ft_isascii.o
index 6119c28..e28cafb 100644
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diff --git a/libft/obj/ft_isdigit.o b/libft/obj/ft_isdigit.o
index bf0722d..87e05b9 100644
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diff --git a/libft/obj/ft_isprint.o b/libft/obj/ft_isprint.o
index c72f58e..1e8a716 100644
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diff --git a/libft/obj/ft_itoa.o b/libft/obj/ft_itoa.o
index 8c24108..57025c2 100644
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diff --git a/libft/obj/ft_lstadd_back_bonus.o b/libft/obj/ft_lstadd_back_bonus.o
index 67c1f2e..a97b101 100644
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diff --git a/libft/obj/ft_lstadd_front_bonus.o b/libft/obj/ft_lstadd_front_bonus.o
index 30a9e4f..f28ae9e 100644
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diff --git a/libft/obj/ft_lstclear_bonus.o b/libft/obj/ft_lstclear_bonus.o
index 32ee2ef..6f6d6c7 100644
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diff --git a/libft/obj/ft_lstdelone_bonus.o b/libft/obj/ft_lstdelone_bonus.o
index 953015a..fff510e 100644
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diff --git a/libft/obj/ft_lstiter_bonus.o b/libft/obj/ft_lstiter_bonus.o
index 9933fd3..a51bda5 100644
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diff --git a/libft/obj/ft_lstlast_bonus.o b/libft/obj/ft_lstlast_bonus.o
index e3f8e88..c9569a9 100644
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diff --git a/libft/obj/ft_lstmap_bonus.o b/libft/obj/ft_lstmap_bonus.o
index 5f758e0..4d7d2bb 100644
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diff --git a/libft/obj/ft_lstnew_bonus.o b/libft/obj/ft_lstnew_bonus.o
index 299d50d..5374b3d 100644
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diff --git a/libft/obj/ft_lstsize_bonus.o b/libft/obj/ft_lstsize_bonus.o
index 5032c79..d7eb61a 100644
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diff --git a/libft/obj/ft_memchr.o b/libft/obj/ft_memchr.o
index c3f003f..7df2b12 100644
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diff --git a/libft/obj/ft_memcmp.o b/libft/obj/ft_memcmp.o
index 6275aad..eeaea53 100644
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diff --git a/libft/obj/ft_memcpy.o b/libft/obj/ft_memcpy.o
index 795ca66..78b03bb 100644
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diff --git a/libft/obj/ft_memmove.o b/libft/obj/ft_memmove.o
index f2a2d83..6cb3598 100644
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diff --git a/libft/obj/ft_memset.o b/libft/obj/ft_memset.o
index 25fbb68..72099e8 100644
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diff --git a/libft/obj/ft_putchar_fd.o b/libft/obj/ft_putchar_fd.o
index 7f16461..611135a 100644
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index 70dfe77..34af8ad 100644
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index 8bbdd52..bf1faac 100644
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diff --git a/libft/obj/ft_straddchar.o b/libft/obj/ft_straddchar.o
index 457b929..7086024 100644
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diff --git a/libft/obj/ft_strdup.o b/libft/obj/ft_strdup.o
index f9669a9..1e68a64 100644
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diff --git a/libft/obj/ft_striteri.o b/libft/obj/ft_striteri.o
index 1341711..354eef1 100644
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diff --git a/libft/obj/ft_strjoin.o b/libft/obj/ft_strjoin.o
index f67b4ef..f784d14 100644
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diff --git a/libft/obj/ft_strlcat.o b/libft/obj/ft_strlcat.o
index 94339c9..20ccf96 100644
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diff --git a/libft/obj/ft_strlen.o b/libft/obj/ft_strlen.o
index 2b75faf..05d939b 100644
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diff --git a/libft/obj/ft_strmapi.o b/libft/obj/ft_strmapi.o
index 87c09a4..8387053 100644
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index fb4b9f4..2d114f2 100644
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diff --git a/libft/obj/ft_strnstr.o b/libft/obj/ft_strnstr.o
index b13c723..1e89f1b 100644
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diff --git a/libft/obj/ft_strrchr.o b/libft/obj/ft_strrchr.o
index 482fbe3..e963234 100644
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diff --git a/libft/obj/ft_strtrim.o b/libft/obj/ft_strtrim.o
index 09ca38f..eb359fd 100644
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diff --git a/libft/obj/ft_substr.o b/libft/obj/ft_substr.o
index e8b22b9..b00a21e 100644
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diff --git a/libft/obj/ft_tolower.o b/libft/obj/ft_tolower.o
index 874f0c6..497a66a 100644
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diff --git a/srcs/parsing/check_map.c b/srcs/parsing/check_map.c
new file mode 100644
index 0000000..1f45fd2
--- /dev/null
+++ b/srcs/parsing/check_map.c
@@ -0,0 +1,157 @@
+#include "cub.h"
+
+int has_playable_neighbor(int x, int y, char **map)
+{
+    if (map[y] && map[y][x + 1] && 
+        (map[y][x + 1] == '0' || map[y][x + 1] == 'N' || 
+         map[y][x + 1] == 'S' || map[y][x + 1] == 'E' || 
+         map[y][x + 1] == 'W'))
+        return (1);
+    if (x > 0 && map[y][x - 1] && 
+        (map[y][x - 1] == '0' || map[y][x - 1] == 'N' || 
+         map[y][x - 1] == 'S' || map[y][x - 1] == 'E' || 
+         map[y][x - 1] == 'W'))
+        return (1);
+    if (map[y + 1] && map[y + 1][x] && 
+        (map[y + 1][x] == '0' || map[y + 1][x] == 'N' || 
+         map[y + 1][x] == 'S' || map[y + 1][x] == 'E' || 
+         map[y + 1][x] == 'W'))
+        return (1);
+    if (y > 0 && map[y - 1] && map[y - 1][x] && 
+        (map[y - 1][x] == '0' || map[y - 1][x] == 'N' || 
+         map[y - 1][x] == 'S' || map[y - 1][x] == 'E' || 
+         map[y - 1][x] == 'W'))
+        return (1);
+    return (0);
+}
+
+int check_isolated_walls(char **map)
+{
+    int i = 0;
+    int j;
+    
+    while (map[i])
+    {
+        j = 0;
+        while (map[i][j])
+        {
+            if (map[i][j] == '1')
+            {
+                if (!has_playable_neighbor(j, i, map))
+                    return (0);  // '1' isolé détecté
+            }
+            j++;
+        }
+        i++;
+    }
+    return (1);  // Pas de '1' isolé
+}
+
+int check_map_char(char **map)
+{
+    int i = 0;
+    int j;
+    int p = 0;
+    
+    while (map[i])
+    {
+        j = 0;
+        while (map[i][j])
+        {
+            if (map[i][j] == '1' || map[i][j] == '0' ||
+                map[i][j] == ' ' || map[i][j] == '\n')
+                j++;
+            else if (map[i][j] == 'S' || map[i][j] == 'N' ||
+                     map[i][j] == 'E' || map[i][j] == 'W')
+            {
+                j++;
+                p++;
+            }
+            else
+                return (2);
+        }
+        i++;
+    }
+    if (p != 1)
+        return (1);
+    return (0);
+}
+
+void find_player_pos(char **map, int *player)
+{
+    int i = 0;
+    int j;
+    
+    while (map[i])
+    {
+        j = 0;
+        while (map[i][j])
+        {
+            if (map[i][j] == 'S' || map[i][j] == 'N' ||
+                map[i][j] == 'E' || map[i][j] == 'W')
+            {
+                player[0] = j;
+                player[1] = i;
+                player[2] = map[i][j];
+                return;
+            }
+            j++;
+        }
+        i++;
+    }
+}
+
+int is_closed_at(int x, int y, char **map)
+{
+    if (!map[y] || !map[y][x] || map[y][x] == '\0')
+        return (0);
+    if (map[y][x] == ' ')
+        return (0);
+    return (1);
+}
+
+int check_walls(char **map)
+{
+    int i = 0;
+    int j;
+    
+    while (map[i])
+    {
+        j = 0;
+        while (map[i][j])
+        {
+            if (map[i][j] == '0' || map[i][j] == 'N' ||
+                map[i][j] == 'S' || map[i][j] == 'E' || map[i][j] == 'W')
+            {
+                if (!is_closed_at(j + 1, i, map) ||
+                    !is_closed_at(j - 1, i, map) ||
+                    !is_closed_at(j, i + 1, map) ||
+                    !is_closed_at(j, i - 1, map))
+                    return (0);
+            }
+            j++;
+        }
+        i++;
+    }
+    return (1);
+}
+
+int validate_map(char **map, int *player)
+{
+    int result;
+    
+    result = check_map_char(map);
+    if (result == 1)
+        return (ft_error(ERROR_PLAYER), 1);
+    if (result == 2)
+        return (ft_error(ERROR_CHAR), 1);
+    
+    find_player_pos(map, player);
+    
+    if (!check_walls(map))
+        return (ft_error(ERROR_NOT_CLOSE), 1);
+    // if (!check_isolated_walls(map))
+    //     return (ft_error("Isolated wall detected"), 1);
+    return (0);
+}
+
diff --git a/srcs/parsing/parsing.c b/srcs/parsing/parsing.c
index 65ebb8f..9d2287a 100644
--- a/srcs/parsing/parsing.c
+++ b/srcs/parsing/parsing.c
@@ -20,5 +20,7 @@ int parsing(t_data *data)
     close(data->parsing.fd_map_dup);
     if (check_colors(data->texture) == 1)
         return (1);
+    if (validate_map(data->parsing.raw_map, data->parsing.player) == 0)
+        return (1);
     return (0);
-}
\ No newline at end of file
+}
diff --git a/srcs/utils/init.c b/srcs/utils/init.c
index 5316358..bae7a86 100644
--- a/srcs/utils/init.c
+++ b/srcs/utils/init.c
@@ -32,4 +32,3 @@ void free_data(t_data *data)
     if (data->texture)
         free(data->texture);
 }
-
diff --git a/srcs/utils/utils.c b/srcs/utils/utils.c
index 5f30607..8254fc6 100644
--- a/srcs/utils/utils.c
+++ b/srcs/utils/utils.c
@@ -34,4 +34,12 @@ void free_char_array(char **array)
     while (array[i])
         free(array[i++]);
     free(array);
+}
+
+int ft_arrlen(char **arr)
+{
+    int i;
+    while(arr[i])
+        i++;
+    return (i);
 }
\ No newline at end of file
diff --git a/test.cub b/test.cub
index 71edc13..e9e371b 100644
--- a/test.cub
+++ b/test.cub
@@ -18,16 +18,17 @@ NO textures/test/north.xpm
                         WE           textures/test/west.xpm
 
 C                   200,200,200
-        11111
+F                   200,200,200
+ 11
+ 1001
+10S01
 10001
-10S01                
+10101
 10001
-10001
-10001
-11001               
+10001  
 10001
 10001
 10001
 10001
 10001
-11111
+ 11