diff --git a/processor/logic/GameBoard.cpp b/processor/logic/GameBoard.cpp
index 514e130..d962c6c 100644
--- a/processor/logic/GameBoard.cpp
+++ b/processor/logic/GameBoard.cpp
@@ -30,7 +30,7 @@ bool GameBoard::attack(const PlayerMove& o) {
 	if (sc_tile.unit <= 1)
 		return false;
 
-	auto moving_unit = o.half ? sc_tile.unit : sc_tile.unit / 2;
+	auto moving_unit = o.half ? sc_tile.unit - 1 : sc_tile.unit / 2;
 	sc_tile.unit -= moving_unit;
 	auto isfriend = isTeammate(o.player, tt_tile.owner);
 	auto delta
diff --git a/processor/logic/PlayerMove.cpp b/processor/logic/PlayerMove.cpp
index 551de55..513cad7 100644
--- a/processor/logic/PlayerMove.cpp
+++ b/processor/logic/PlayerMove.cpp
@@ -3,14 +3,14 @@
 #include "pc/commcode.h"
 
 bool PlayerMove::isValid(pos_t w, pos_t h) const {
-	if (x < 0 || x >= h || y < 0 || y >= w)
+	if (x >= h || y >= w)
 		return false;
 
 	if ((int)dir >= 4)
 		return false;
 
 	auto xx = tx(), yy = ty();
-	if (xx < 0 || xx >= h || yy < 0 || yy >= w)
+	if (xx >= h || yy >= w)
 		return false;
 
 	return true;
diff --git a/processor/logic/terrain.cpp b/processor/logic/terrain.cpp
index deea5a2..6c3ca59 100644
--- a/processor/logic/terrain.cpp
+++ b/processor/logic/terrain.cpp
@@ -37,35 +37,35 @@ void upmin(T& x, const T& y) {
 bool findCut(pos_t w, pos_t h, vector<vector<VertexType>>& vertex_type) {
 	int idx = 0;
 	vector<vector<int>> dfn(h, vector<int>(w)), low = dfn;
-	function<void(int, int, int, int, bool)> tarjan
-		= [&](int x, int y, int fx, int fy, bool rt) {
-			  dfn[x][y] = low[x][y] = ++idx;
-			  int ch = 0;
-			  for (int i = 0; i < 4; i++) {
-				  const int xx = x + direction_dx[i], yy = y + direction_dy[i];
-				  if (xx < 0 || xx >= h || yy < 0 || yy >= w)
-					  continue;
+	function<void(pos_t, pos_t, pos_t, pos_t, bool)> tarjan =
+		[&](pos_t x, pos_t y, pos_t fx, pos_t fy, bool rt) {
+			dfn[x][y] = low[x][y] = ++idx;
+			int ch = 0;
+			for (int i = 0; i < 4; i++) {
+				const pos_t xx = x + direction_dx[i], yy = y + direction_dy[i];
+				if (xx >= h || yy >= w)
+					continue;
 
-				  if (vertex_type[xx][yy] == VertexType::Capital)
-					  vertex_type[x][y] = VertexType::Cut;
+				if (vertex_type[xx][yy] == VertexType::Capital)
+					vertex_type[x][y] = VertexType::Cut;
 
-				  if (ban(vertex_type[xx][yy]) || (xx == fx && yy == fy))
-					  continue;
+				if (ban(vertex_type[xx][yy]) || (xx == fx && yy == fy))
+					continue;
 
-				  if (!dfn[xx][yy]) {
-					  ch++;
-					  tarjan(xx, yy, x, y, 0);
-					  upmin(low[x][y], low[xx][yy]);
-					  if (!rt && low[xx][yy] >= dfn[x][y])
-						  vertex_type[x][y] = VertexType::Cut;
-				  } else {
-					  upmin(low[x][y], dfn[xx][yy]);
-				  }
-			  }
+				if (!dfn[xx][yy]) {
+					ch++;
+					tarjan(xx, yy, x, y, 0);
+					upmin(low[x][y], low[xx][yy]);
+					if (!rt && low[xx][yy] >= dfn[x][y])
+						vertex_type[x][y] = VertexType::Cut;
+				} else {
+					upmin(low[x][y], dfn[xx][yy]);
+				}
+			}
 
-			  if (rt && ch >= 2)
-				  vertex_type[x][y] = VertexType::Cut;
-		  };
+			if (rt && ch >= 2)
+				vertex_type[x][y] = VertexType::Cut;
+		};
 
 	bool flag = false;
 	for (pos_t i = 0; i < h; i++) {
@@ -169,9 +169,9 @@ GameBoard ImportedTerrain::makeGameBoard(const InitInfo& init_info) {
 		for (pos_t y = 0; y < w; y++) {
 			if (g.at(x, y).type == TileType::Capital) {
 				for (int i = 0; i < 4; i++) {
-					const int xx = x + direction_dx[i],
-							  yy = y + direction_dy[i];
-					if (xx < 0 || xx >= h || yy < 0 || yy >= w)
+					const pos_t xx = x + direction_dx[i],
+								yy = y + direction_dy[i];
+					if (xx >= h || yy >= w)
 						continue;
 					if (g.at(xx, yy).type == TileType::Capital)
 						throw BadCapitalAssign();
diff --git a/processor/pc/pctypes.cpp b/processor/pc/pctypes.cpp
index cd42537..946f484 100644
--- a/processor/pc/pctypes.cpp
+++ b/processor/pc/pctypes.cpp
@@ -5,3 +5,5 @@ PlayerRanking::PlayerRanking() : player(neutral_player)
 
 TeamRanking::TeamRanking() : team(neutral_team), land(0), unit(0) {}
 
+Tile::Tile() : owner(neutral_player), unit(0) {}
+
diff --git a/processor/pc/pctypes.h b/processor/pc/pctypes.h
index 834eeb9..a68d992 100644
--- a/processor/pc/pctypes.h
+++ b/processor/pc/pctypes.h
@@ -56,6 +56,8 @@ struct Tile {
 	TileType type;
 	std::int32_t unit;
 
+	Tile();
+
 	OGPC_DECLARE_ASTUPLE(owner, type, unit)
 };