diff --git a/main.cpp b/main.cpp
index 1fd3bf7..5ea87b8 100644
--- a/main.cpp
+++ b/main.cpp
@@ -69,7 +69,11 @@ Moves serialize(const string &s) {
             string err = "Invalid player: " + player;
             throw invalid_argument(err);
         }
-        result.moves.push_back({player[0], x, y});
+        Move move;
+        move.player = player[0];
+        move.moveX = x;
+        move.moveY = y;
+        result.moves.push_back(move);
     }
 
     return result;
@@ -140,7 +144,10 @@ void bubbleSort(pair<char, int> *a) {
 void printScores(int *points) {
     pair<char, int> *arr = static_cast<pair<char, int> *>(alloc(26 * sizeof(pair<char, int>)));
     for (int i = 0; i < 26; i++) {
-        arr[i] = {static_cast<char>(i + 'a'), points[i]};
+        pair<char, int> p;
+        p.first = static_cast<char>(i + 'a');
+        p.second = points[i];
+        arr[i] = p;
     }
 
     bubbleSort(arr);
@@ -159,8 +166,7 @@ void printScores(int *points) {
 }
 
 bool isValidMove(int x, int y) {
-    // TODO: simplify this
-    return !(x & 1 != y & 1 && !(x & 1));
+    return (x & 1) != (y & 1);
 }
 
 void addPoint(
@@ -252,7 +258,9 @@ void solve(Moves moves, char **board) {
         points[i] = -1;
     }
 
-    for (Move &move: moves.moves) {
+    for (int i = 0; i < moves.moves.size(); i++) {
+        Move move = moves.moves[i];
+
         int moveX = move.moveX;
         int moveY = move.moveY;
         char player = move.player;
@@ -290,55 +298,6 @@ void solve(Moves moves, char **board) {
     dealloc(points);
 }
 
-/*
-void solve(Moves moves, char **board) {
-    /*
-     TODO: use custom arr for points over map
-     *int *points = static_cast<int *>(alloc(26));
-    for (int i = 0; i < 26; i++) {
-        points[i] = 0;
-    }#1#
-    map<char, int> points;
-
-    for (const auto &move: moves.moves) {
-        int moveX = move.moveX;
-        int moveY = move.moveY;
-        char player = move.player;
-
-        board[moveX][moveY] = toLowerCase(player);
-
-        if (moveX % 2 == 0 && moveY % 2 == 1) {
-            if (moveX > 0 && board[moveX - 1][moveY] == '|' && board[moveX - 1][moveY - 1] == '-' && board[moveX - 1][moveY + 1] == '-') {
-                points[player]++;
-            }
-            if (moveX < moves.x - 1 && board[moveX + 1][moveY] == '|' && board[moveX + 1][moveY - 1] == '-' && board[moveX + 1][moveY + 1] == '-') {
-                points[player]++;
-            }
-        } else if (moveX % 2 == 1 && moveY % 2 == 0) {
-            if (moveY > 0 && board[moveX][moveY - 1] == '-' && board[moveX - 1][moveY - 1] == '|' && board[moveX + 1][moveY - 1] == '|') {
-                points[player]++;
-            }
-            if (moveY < moves.y - 1 && board[moveX][moveY + 1] == '-' && board[moveX - 1][moveY + 1] == '|' && board[moveX + 1][moveY + 1] == '|') {
-                points[player]++;
-            }
-        }
-    }
-
-    vector<pair<char, int> > ranking(points.begin(), points.end());
-    sort(ranking.begin(), ranking.end(), [](const pair<char, int> &a, const pair<char, int> &b) {
-        return a.second < b.second;
-    });
-
-    for (const auto &rank: ranking) {
-        pt rank.first << ": " << rank.second << " boxes" << nl;
-    }
-    printBoard(board, moves.x, moves.y);
-
-
-    // dealloc(points);
-}
-*/
-
 int init(char *fileName) {
     // --- IO START ---
     FILE *inp = fopen(fileName, "r");
@@ -381,6 +340,7 @@ int init(char *fileName) {
 int main(int argc, char **argv) {
     if (argc < 2) {
         pter "No input file provided" << nl;
+        pter "Usage: dotsandboxes /path/to/input.txt" << nl;
         return 1;
     }