diff --git a/masterchess/chess.py b/masterchess/chess.py
index 63f5aab..35ba524 100644
--- a/masterchess/chess.py
+++ b/masterchess/chess.py
@@ -79,6 +79,74 @@ class Pieces(object):
 
         self.set_position(position or (0, 0))
 
+    def _se_positions(self, max_size):
+        """
+            Retrieve the south east positions of as given position
+        """
+        ne_positions = []
+
+        x, y = self.position
+        rg = range(max_size)
+        while True:
+            x += 1
+            y -= 1
+            if x not in rg or y not in rg:
+                break
+            ne_positions.append((x, y))
+
+        return ne_positions
+
+    def _ne_positions(self, max_size):
+        """
+            Retrieve the north east positions of as given position
+        """
+        ne_positions = []
+
+        x, y = self.position
+        rg = range(max_size)
+        while True:
+            x += 1
+            y += 1
+            if x not in rg or y not in rg:
+                break
+            ne_positions.append((x, y))
+
+        return ne_positions
+
+    def _nw_positions(self, max_size):
+        """
+            Retrieve the south weast positions of as given position
+        """
+        ne_positions = []
+
+        x, y = self.position
+        rg = range(max_size)
+        while True:
+            x -= 1
+            y += 1
+            if x not in rg or y not in rg:
+                break
+            ne_positions.append((x, y))
+
+        return ne_positions
+
+    def _sw_positions(self, max_size):
+        """
+            Retrieve the south weast positions of as given position
+        """
+        ne_positions = []
+
+        x, y = self.position
+        rg = range(max_size)
+        while True:
+            x -= 1
+            y -= 1
+            if x not in rg or y not in rg:
+                break
+            ne_positions.append((x, y))
+
+        return ne_positions
+
     def set_position(self, position):
         """
         Set the x,y position of the piece on the board.
@@ -113,7 +181,14 @@ class Bishop(Pieces):
         Arguments:
         max_size -- integer that defines de boundary limits of the board.
         """
-        pass
+        zone = []
+
+        zone += self._se_positions(max_size)
+        zone += self._ne_positions(max_size)
+        zone += self._nw_positions(max_size)
+        zone += self._sw_positions(max_size)
+
+        return zone
 
 
 class Kinight(Pieces):

Implement threatening zone for bishops
diff --git a/tests/tests.py b/tests/tests.py
index c70e5aa..a6db443 100644
--- a/tests/tests.py
+++ b/tests/tests.py
@@ -1,4 +1,3 @@
-# coding: utf-8
 import unittest
 
 from masterchess import chess
@@ -164,6 +163,92 @@ class TestsChessMasterPiece(unittest.TestCase):
             sorted(pawn.threatening_zone(8)), sorted(expected)
         )
 
+    def test_se_positions(self):
+
+        piece = chess.Pieces((3, 4))
+
+        expected = [
+            (4, 3),
+            (5, 2),
+            (6, 1),
+            (7, 0),
+        ]
+
+        self.assertEqual(
+            sorted(piece._se_positions(8)), sorted(expected)
+        )
+
+    def test_ne_positions(self):
+
+        piece = chess.Pieces((3, 4))
+
+        expected = [
+            (4, 5),
+            (5, 6),
+            (6, 7)
+        ]
+
+        self.assertEqual(
+            sorted(piece._ne_positions(8)), sorted(expected)
+        )
+
+    def test_nw_positions(self):
+
+        piece = chess.Pieces((3, 4))
+
+        expected = [
+            (2, 5),
+            (1, 6),
+            (0, 7)
+        ]
+
+        self.assertEqual(
+            sorted(piece._nw_positions(8)), sorted(expected)
+        )
+
+    def test_sw_positions(self):
+
+        piece = chess.Pieces((3, 4))
+
+        expected = [
+            (2, 3),
+            (1, 2),
+            (0, 1)
+        ]
+
+        self.assertEqual(
+            sorted(piece._sw_positions(8)), sorted(expected)
+        )
+
+
+    def test_bishop_threatening_zone(self):
+        """
+        Testing bishop moves when the piece is able to threatening other pieces
+        in all directions.
+        """
+
+        bishop = chess.Bishop((3, 4))
+
+        expected = [
+            (0, 1),
+            (0, 7),
+            (1, 2),
+            (1, 6),
+            (2, 3),
+            (2, 5),
+            (4, 3),
+            (4, 5),
+            (5, 2),
+            (5, 6),
+            (6, 1),
+            (6, 7),
+            (7, 0)
+        ]
+
+        self.assertEqual(
+            sorted(bishop.threatening_zone(8)), sorted(expected)
+        )
+
 
 class TestsChessMasterBoard(unittest.TestCase):
 

pip install -e .[dev]
parse_log_pytest
pytest
pytest
3.9
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
-e git+https://github.com/fabiobatalha/chess_master.git@dabbee5c27437b805262f12e0181aceae7066bcb#egg=chessmaster
coverage==7.8.0
exceptiongroup @ file:///croot/exceptiongroup_1706031385326/work
iniconfig @ file:///home/linux1/recipes/ci/iniconfig_1610983019677/work
nose==1.3.7
packaging @ file:///croot/packaging_1734472117206/work
pluggy @ file:///croot/pluggy_1733169602837/work
pytest @ file:///croot/pytest_1738938843180/work
tomli @ file:///opt/conda/conda-bld/tomli_1657175507142/work

name: chess_master
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - exceptiongroup=1.2.0=py39h06a4308_0
  - iniconfig=1.1.1=pyhd3eb1b0_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.4.4=h6a678d5_1
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=3.0.16=h5eee18b_0
  - packaging=24.2=py39h06a4308_0
  - pip=25.0=py39h06a4308_0
  - pluggy=1.5.0=py39h06a4308_0
  - pytest=8.3.4=py39h06a4308_0
  - python=3.9.21=he870216_1
  - readline=8.2=h5eee18b_0
  - setuptools=75.8.0=py39h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - tomli=2.0.1=py39h06a4308_0
  - tzdata=2025a=h04d1e81_0
  - wheel=0.45.1=py39h06a4308_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - coverage==7.8.0
      - nose==1.3.7
prefix: /opt/conda/envs/chess_master

tests/tests.py::TestsChessMasterPiece::test_bishop_threatening_zone tests/tests.py::TestsChessMasterPiece::test_ne_positions tests/tests.py::TestsChessMasterPiece::test_nw_positions tests/tests.py::TestsChessMasterPiece::test_se_positions tests/tests.py::TestsChessMasterPiece::test_sw_positions
tests/tests.py::TestsChessMasterPiece::test_instanciation_piece tests/tests.py::TestsChessMasterPiece::test_instanciation_preset_position tests/tests.py::TestsChessMasterPiece::test_pawn_threatening_x_boundary_left tests/tests.py::TestsChessMasterPiece::test_pawn_threatening_x_boundary_right tests/tests.py::TestsChessMasterPiece::test_pawn_threatening_zone tests/tests.py::TestsChessMasterPiece::test_pawn_threatening_zone_y_boundary tests/tests.py::TestsChessMasterPiece::test_pawn_threatening_zone_y_boundary_last_move tests/tests.py::TestsChessMasterPiece::test_set_invalid_position_1 tests/tests.py::TestsChessMasterPiece::test_set_invalid_position_2 tests/tests.py::TestsChessMasterPiece::test_set_invalid_position_3 tests/tests.py::TestsChessMasterPiece::test_set_invalid_position_4 tests/tests.py::TestsChessMasterPiece::test_set_invalid_position_5 tests/tests.py::TestsChessMasterPiece::test_set_invalid_position_6 tests/tests.py::TestsChessMasterPiece::test_set_invalid_position_7 tests/tests.py::TestsChessMasterPiece::test_set_invalid_position_8 tests/tests.py::TestsChessMasterPiece::test_set_position tests/tests.py::TestsChessMasterBoard::test_instanciating_board_size_3 tests/tests.py::TestsChessMasterBoard::test_instanciating_board_size_7 tests/tests.py::TestsChessMasterBoard::test_instanciating_board_wrong_size tests/tests.py::TestsChessMasterBoard::test_put_1_piece tests/tests.py::TestsChessMasterBoard::test_put_2_pieces tests/tests.py::TestsChessMasterBoard::test_put_piece_in_occupied_square
masterchess/chess.py
masterchess/chess.py