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diff --git a/Test_case/level_3/6.json b/Test_case/level_3/6.json
new file mode 100644
index 0000000000000000000000000000000000000000..26a7232c5fa2d55b0ba17959e3b754df721bd70f
--- /dev/null
+++ b/Test_case/level_3/6.json
@@ -0,0 +1,32 @@
+{
+ "upper": [
+ [
+ "p",
+ -1,
+ 1
+ ],
+ [
+ "s",
+ 2,
+ 1
+ ]
+ ],
+ "lower": [
+ [
+ "r",
+ 2,
+ 2
+ ],
+ [
+ "r",
+ 3,
+ 1
+ ],
+ [
+ "r",
+ 4,
+ 0
+ ]
+ ],
+ "block": []
+}
\ No newline at end of file
diff --git a/Test_case/level_3/7.json b/Test_case/level_3/7.json
new file mode 100644
index 0000000000000000000000000000000000000000..b3ff22fd4cfa513fd082e0a0fc9b35176e7d3d6b
--- /dev/null
+++ b/Test_case/level_3/7.json
@@ -0,0 +1,33 @@
+{
+ "upper": [
+ [
+ "p",
+ -1,
+ 1
+ ],
+ [
+ "s",
+ 2,
+ 1
+ ]
+ ],
+ "lower": [
+ [
+ "r",
+ 2,
+ 2
+ ],
+ [
+ "r",
+ 4,
+ 0
+ ]
+ ],
+ "block": [
+ [
+ "",
+ 3,
+ 1
+ ]
+ ]
+}
\ No newline at end of file
diff --git a/Test_case/level_3/8.json b/Test_case/level_3/8.json
new file mode 100644
index 0000000000000000000000000000000000000000..0b5b5e00f3fc05e7b8448bab2dece004a08c5673
--- /dev/null
+++ b/Test_case/level_3/8.json
@@ -0,0 +1,48 @@
+{
+ "upper": [
+ [
+ "s",
+ 2,
+ 1
+ ],
+ [
+ "p",
+ 4,
+ -4
+ ]
+ ],
+ "lower": [
+ [
+ "r",
+ -2,
+ 4
+ ],
+ [
+ "r",
+ 4,
+ 0
+ ]
+ ],
+ "block": [
+ [
+ "",
+ -1,
+ 1
+ ],
+ [
+ "",
+ 0,
+ 1
+ ],
+ [
+ "",
+ 1,
+ 1
+ ],
+ [
+ "",
+ 3,
+ 1
+ ]
+ ]
+}
\ No newline at end of file
diff --git a/Test_case/level_3/9.json b/Test_case/level_3/9.json
new file mode 100644
index 0000000000000000000000000000000000000000..905b5878e773f29483f389555832bf97c51f0258
--- /dev/null
+++ b/Test_case/level_3/9.json
@@ -0,0 +1,58 @@
+{
+ "upper": [
+ [
+ "p",
+ 2,
+ -3
+ ],
+ [
+ "s",
+ 2,
+ 1
+ ]
+ ],
+ "lower": [
+ [
+ "r",
+ -2,
+ 4
+ ],
+ [
+ "r",
+ 4,
+ 0
+ ]
+ ],
+ "block": [
+ [
+ "",
+ -3,
+ 1
+ ],
+ [
+ "",
+ -2,
+ 1
+ ],
+ [
+ "",
+ -1,
+ 1
+ ],
+ [
+ "",
+ 0,
+ 1
+ ],
+ [
+ "",
+ 1,
+ 1
+ ],
+ [
+ "",
+ 3,
+ 1
+ ]
+ ]
+}
\ No newline at end of file
diff --git a/Test_case/level_4/1.json b/Test_case/level_4/1.json
new file mode 100644
index 0000000000000000000000000000000000000000..7863e69b2783bec2cb71870b1640f97ade19cb00
--- /dev/null
+++ b/Test_case/level_4/1.json
@@ -0,0 +1,27 @@
+{
+ "upper": [
+ [
+ "r",
+ 2,
+ -4
+ ],
+ [
+ "p",
+ 2,
+ -3
+ ],
+ [
+ "p",
+ 3,
+ -4
+ ]
+ ],
+ "lower": [
+ [
+ "s",
+ 4,
+ 0
+ ]
+ ],
+ "block": []
+}
\ No newline at end of file
diff --git a/Test_case/level_4/2.json b/Test_case/level_4/2.json
new file mode 100644
index 0000000000000000000000000000000000000000..6899b9b605765614165fc4a6d541afbdc37c2595
--- /dev/null
+++ b/Test_case/level_4/2.json
@@ -0,0 +1,33 @@
+{
+ "upper": [
+ [
+ "r",
+ 2,
+ -4
+ ],
+ [
+ "s",
+ 2,
+ -3
+ ],
+ [
+ "p",
+ 3,
+ -4
+ ]
+ ],
+ "lower": [
+ [
+ "s",
+ 4,
+ 0
+ ]
+ ],
+ "block": [
+ [
+ "",
+ 3,
+ -3
+ ]
+ ]
+}
\ No newline at end of file
diff --git a/Test_case/level_4/3.json b/Test_case/level_4/3.json
new file mode 100644
index 0000000000000000000000000000000000000000..838eb349fc047afce8609ed4af4c0439e443b5ba
--- /dev/null
+++ b/Test_case/level_4/3.json
@@ -0,0 +1,37 @@
+{
+ "upper": [
+ [
+ "s",
+ 0,
+ -1
+ ],
+ [
+ "r",
+ 0,
+ 0
+ ],
+ [
+ "p",
+ 0,
+ 1
+ ]
+ ],
+ "lower": [
+ [
+ "s",
+ -4,
+ 0
+ ],
+ [
+ "p",
+ -4,
+ 2
+ ],
+ [
+ "r",
+ -4,
+ 4
+ ]
+ ],
+ "block": []
+}
\ No newline at end of file
diff --git a/Test_case/level_4/4.json b/Test_case/level_4/4.json
new file mode 100644
index 0000000000000000000000000000000000000000..862f4f826036aae0883047708e39b56d6209c1ba
--- /dev/null
+++ b/Test_case/level_4/4.json
@@ -0,0 +1,37 @@
+{
+ "upper": [
+ [
+ "s",
+ -4,
+ 2
+ ],
+ [
+ "p",
+ 0,
+ 0
+ ],
+ [
+ "p",
+ 4,
+ 0
+ ]
+ ],
+ "lower": [
+ [
+ "s",
+ -4,
+ 0
+ ],
+ [
+ "p",
+ -4,
+ 1
+ ],
+ [
+ "r",
+ -4,
+ 4
+ ]
+ ],
+ "block": []
+}
\ No newline at end of file
diff --git a/Test_case/level_4/5.json b/Test_case/level_4/5.json
new file mode 100644
index 0000000000000000000000000000000000000000..3fbb4379715f099cbbc6a8844ede1a82241fbf46
--- /dev/null
+++ b/Test_case/level_4/5.json
@@ -0,0 +1,68 @@
+{
+ "upper": [
+ [
+ "s",
+ -4,
+ 2
+ ],
+ [
+ "s",
+ 0,
+ 0
+ ],
+ [
+ "p",
+ 4,
+ 0
+ ]
+ ],
+ "lower": [
+ [
+ "s",
+ -4,
+ 0
+ ],
+ [
+ "p",
+ -4,
+ 1
+ ],
+ [
+ "r",
+ -4,
+ 4
+ ],
+ [
+ "s",
+ -3,
+ 4
+ ],
+ [
+ "s",
+ 0,
+ -4
+ ],
+ [
+ "s",
+ 0,
+ 4
+ ],
+ [
+ "s",
+ 4,
+ -4
+ ],
+ [
+ "s",
+ 4,
+ -1
+ ]
+ ],
+ "block": [
+ [
+ "",
+ 0,
+ -1
+ ]
+ ]
+}
\ No newline at end of file
diff --git a/search/method.py b/search/method.py
new file mode 100644
index 0000000000000000000000000000000000000000..f17fa2eab4b4efcda915e63d9a303f23ef0add59
--- /dev/null
+++ b/search/method.py
@@ -0,0 +1,92 @@
+
+from src.search.util import print_board
+import json
+
+"""
+Read from JSON file:
+ -> load each piece into board's dictionary.
+ -> ensure format token to distinguish between upper and lower.
+ -> handling file IO exception
+"""
+def to_board(file):
+ TYPE = 0
+ X_COORD = 1
+ Y_COORD = 2
+
+ if not isinstance(file, str):
+ print("Pass invalid argument to to_board()~!!!")
+ exit(-1)
+ try:
+ # open the file handle by json module
+ FILE = open(file)
+ game = json.load(FILE)
+
+ board = {}
+ # iterate through the entity who is not empty in order to add it type and coordinate to dictionary.
+ for entity in game.keys():
+
+ if game[entity]:
+
+ for token in game[entity]:
+ if entity == 'upper':
+ board[(int(token[X_COORD]), int(token[Y_COORD]))] = token[TYPE].upper()
+ else:
+ board[(int(token[X_COORD]), int(token[Y_COORD]))] = token[TYPE]
+
+ FILE.close()
+ return board
+
+ except IOError:
+ print("There is an issue when try to open file")
+ exit(-1)
+
+
+"""
+taken from https://www.redblobgames.com/grids/hexagons/
+under section: double coordinates for doublewidth
+->
+"""
+def distance_between(Upper_token, Lower_token):
+ dx = abs(Upper_token[0] - Lower_token[0])
+ dy = abs(Upper_token[1] - Lower_token[1])
+
+ return dx + max(0, (dy - dx) / 2)
+
+
+"""
+movement logic
+"""
+row = 1
+collumn = 2
+
+def move_left(coordinate):
+ if coordinate:
+ coordinate[collumn] -= 1
+
+def move_right(coordinate):
+ if coordinate:
+ coordinate[collumn] += 1
+
+def move_up_left(coordinate):
+ if coordinate:
+ coordinate[collumn] -= 1
+ coordinate[row] += 1
+
+def move_up_right(coordinate):
+ if coordinate:
+ coordinate[row] += 1
+
+
+def move_down_left(coordinate):
+ if coordinate:
+ coordinate[row] -= 1
+
+def move_down_right(coordinate):
+ if coordinate:
+ coordinate[row] -= 1
+ coordinate[collumn] += 1
+
+
+def transfer_move_to_board(, coordinate, new_coordinate):
+ if not board[new_coordinate]
+print(distance_between([-3, 0], [1, 0]))