+static const byte is_blank[GAME_TILE_MAX] =
+{
+ [Xblank] = 1,
+ [Xsplash_e] = 1,
+ [Xsplash_w] = 1,
+ [Xfake_acid_1] = 1,
+ [Xfake_acid_2] = 1,
+ [Xfake_acid_3] = 1,
+ [Xfake_acid_4] = 1,
+ [Xfake_acid_5] = 1,
+ [Xfake_acid_6] = 1,
+ [Xfake_acid_7] = 1,
+ [Xfake_acid_8] = 1
+};
+
+static const byte is_blank_or_acid[GAME_TILE_MAX] =
+{
+ [Xblank] = 1,
+ [Xsplash_e] = 1,
+ [Xsplash_w] = 1,
+ [Xfake_acid_1] = 1,
+ [Xfake_acid_2] = 1,
+ [Xfake_acid_3] = 1,
+ [Xfake_acid_4] = 1,
+ [Xfake_acid_5] = 1,
+ [Xfake_acid_6] = 1,
+ [Xfake_acid_7] = 1,
+ [Xfake_acid_8] = 1,
+ [Xacid_1] = 1,
+ [Xacid_2] = 1,
+ [Xacid_3] = 1,
+ [Xacid_4] = 1,
+ [Xacid_5] = 1,
+ [Xacid_6] = 1,
+ [Xacid_7] = 1,
+ [Xacid_8] = 1
+};
+
+static const byte is_player[GAME_TILE_MAX] =
+{
+ [Zplayer] = 1,
+ [Xfake_acid_1_player] = 1,
+ [Xfake_acid_2_player] = 1,
+ [Xfake_acid_3_player] = 1,
+ [Xfake_acid_4_player] = 1,
+ [Xfake_acid_5_player] = 1,
+ [Xfake_acid_6_player] = 1,
+ [Xfake_acid_7_player] = 1,
+ [Xfake_acid_8_player] = 1
+};
+
+static const byte add_player[GAME_TILE_MAX] =
+{
+ [Xblank] = Zplayer,
+ [Xsplash_e] = Zplayer,
+ [Xsplash_w] = Zplayer,
+ [Xfake_acid_1] = Xfake_acid_1_player,
+ [Xfake_acid_2] = Xfake_acid_2_player,
+ [Xfake_acid_3] = Xfake_acid_3_player,
+ [Xfake_acid_4] = Xfake_acid_4_player,
+ [Xfake_acid_5] = Xfake_acid_5_player,
+ [Xfake_acid_6] = Xfake_acid_6_player,
+ [Xfake_acid_7] = Xfake_acid_7_player,
+ [Xfake_acid_8] = Xfake_acid_8_player
+};
+
+static const byte remove_player[GAME_TILE_MAX] =
+{
+ [Zplayer] = Xblank,
+ [Xfake_acid_1_player] = Xfake_acid_1,
+ [Xfake_acid_2_player] = Xfake_acid_2,
+ [Xfake_acid_3_player] = Xfake_acid_3,
+ [Xfake_acid_4_player] = Xfake_acid_4,
+ [Xfake_acid_5_player] = Xfake_acid_5,
+ [Xfake_acid_6_player] = Xfake_acid_6,
+ [Xfake_acid_7_player] = Xfake_acid_7,
+ [Xfake_acid_8_player] = Xfake_acid_8
+};
+
+static const byte is_amoeba[GAME_TILE_MAX] =
+{
+ [Xfake_amoeba] = 1,
+ [Yfake_amoeba] = 1,
+ [Xamoeba_1] = 1,
+ [Xamoeba_2] = 1,
+ [Xamoeba_3] = 1,
+ [Xamoeba_4] = 1,
+ [Xamoeba_5] = 1,
+ [Xamoeba_6] = 1,
+ [Xamoeba_7] = 1,
+ [Xamoeba_8] = 1
+};
+
+static byte is_android_blank[GAME_TILE_MAX] =
+{
+ [Xblank] = 1,
+ [Xsplash_e] = 1,
+ [Xsplash_w] = 1,
+ [Xfake_acid_1] = 1,
+ [Xfake_acid_2] = 1,
+ [Xfake_acid_3] = 1,
+ [Xfake_acid_4] = 1,
+ [Xfake_acid_5] = 1,
+ [Xfake_acid_6] = 1,
+ [Xfake_acid_7] = 1,
+ [Xfake_acid_8] = 1
+};
+
+static const byte is_android_walkable[GAME_TILE_MAX] =
+{
+ [Xblank] = 1,
+ [Xsplash_e] = 1,
+ [Xsplash_w] = 1,
+ [Xfake_acid_1] = 1,
+ [Xfake_acid_2] = 1,
+ [Xfake_acid_3] = 1,
+ [Xfake_acid_4] = 1,
+ [Xfake_acid_5] = 1,
+ [Xfake_acid_6] = 1,
+ [Xfake_acid_7] = 1,
+ [Xfake_acid_8] = 1,
+ [Xplant] = 1
+};
+