diff --git a/zeta_C/completed/10469.c b/zeta_C/completed/10469.c
new file mode 100644
index 0000000..0bbb46d
--- /dev/null
+++ b/zeta_C/completed/10469.c
@@ -0,0 +1,54 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct {
+    int x, y;
+} Point;
+
+int main() {
+    Point queens[64];
+    int length = 0;
+    char temp[8];
+    Point temp_pos;
+    bool flag = true;
+    for (int i = 0; i < 8; i++) {
+        scanf("%s", temp);
+        for (int j = 0; j < 8; j++) {
+            if (temp[j] == '*') {
+                queens[length].x = i;
+                queens[length].y = j;
+                length++;
+            }
+        }
+    }
+
+    if (length != 8) flag = false;
+
+    Point a, b;
+
+    for (int i = 0; i < length; i++) {
+        if (flag == false) {
+            break;
+        }
+        a = queens[i];
+
+        for (int j = 0; j < i; j++) {
+            b = queens[j];
+            if (a.x == b.x) {
+                flag = false;
+                break;
+            } else if (a.y == b.y) {
+                flag = false;
+                break;
+            } else if (abs(a.x - b.x) == abs(a.y - b.y)) {
+                flag = false;
+                break;
+            }
+        }
+    }
+
+    flag ? printf("valid\n") : printf("invalid\n");
+
+    return 0;
+}
\ No newline at end of file