diff --git a/python_prototype/backtrack.py b/python_prototype/backtrack.py
index 32467cc..131edb6 100755
--- a/python_prototype/backtrack.py
+++ b/python_prototype/backtrack.py
@@ -7,7 +7,7 @@ from time import sleep
 # PADDING = int(os.popen('tput cols').read()) // 3 # '// 2 - 6' for exact middle for n=4
 PADDING = 5
 DEBUG = False
-ITER = -1
+# ITER = -1
 
 def get_board_dim(board: list) -> int:
     return int(len(board) ** 0.5)
@@ -88,16 +88,16 @@ def check_constraint(slice: list, constraint: int) -> bool:
         return True
 
 def is_valid_state(board: list, border: list, next_candidate_index: int) -> bool:
-    global ITER
+    # global ITER
 
     row = get_row(board, next_candidate_index)
     column = get_col(board, next_candidate_index)
     constraints = get_constraints(board, border, next_candidate_index)
-    ITER += 1
-    if ITER % 100000 == 0:
-        os.system('clear')
-        print_board(board, border)
-        print(f'{ITER=}')
+    # ITER += 1
+    # if ITER % 100000 == 0:
+    #     os.system('clear')
+    #     print_board(board, border)
+    #     print(f'{ITER=}')
     satisfies_constraints = all([
         check_constraint(column,       constraints[0]),
         check_constraint(row,          constraints[2]),
@@ -176,6 +176,6 @@ if __name__ == '__main__':
     # main('3 2 2 1 1 2 1 1 4 2 1 2 1 2 2 2') # henri's problem
     # main('2 1 2 3 3 2 3 1 3 2 2 1 3 3 2 3 4 2 1 2') # 5 x 5
     # main('1 2 2 4 3 5 4 4 2 2 2 1 1 2 3 4 2 4 5 3 3 2 2 1') # 6 x 6
-    # main('6 3 1 3 3 3 2 1 2 3 3 3 3 3 3 7 3 4 3 2 1 2 1 2 2 3 3 4') # 7 x 7
+    main('6 3 1 3 3 3 2 1 2 3 3 3 3 3 3 7 3 4 3 2 1 2 1 2 2 3 3 4') # 7 x 7
     # main('7 4 2 3 3 2 1 1 2 2 2 3 4 6 6 5 4 2 3 2 1 1 2 2 4 2 4 4') # 7 x 7
-    main('4 3 4 1 5 4 3 2 2 4 2 4 1 3 5 4 3 3 5 2 3 1 3 2 2 1 2 3 2 4 3 3') # 8 x 8
+    # main('4 3 4 1 5 4 3 2 2 4 2 4 1 3 5 4 3 3 5 2 3 1 3 2 2 1 2 3 2 4 3 3') # 8 x 8