diff --git a/dev.js b/dev.js
index 7ed7e12..27dc4cd 100644
--- a/dev.js
+++ b/dev.js
@@ -34,7 +34,7 @@ function showlocalNetAddress(PORT) {
     networkInterfaces?.['Wi-Fi']?.[1]?.address ||
     networkInterfaces?.Ethernet?.[1]?.address ||
     null;
-  
+
   if (localNetAddress) {
     console.log(`network : ${localNetAddress}:${PORT}/`);
   } else {
@@ -42,11 +42,11 @@ function showlocalNetAddress(PORT) {
   }
 }
 
-async function start () {
+async function start() {
   try {
     await app.listen({ port: PORT, host: '::' });
   } catch (err) {
     app.log.error(err);
     process.exit(1);
   }
-};
+}
diff --git a/lib/TicTacToe.js b/lib/TicTacToe.js
index 24e98aa..d23eb97 100644
--- a/lib/TicTacToe.js
+++ b/lib/TicTacToe.js
@@ -21,7 +21,7 @@ function randomInteger(min, max) {
 }
 
 function intSum(min, max) {
-  return ((max - min) + 1) * (min + max) / 2;
+  return ((max - min + 1) * (min + max)) / 2;
 }
 
 /** A single thread, blocking, **tic-tac-toe** class game representation that
@@ -236,9 +236,10 @@ class TicTacToe {
 
     // check diag \
     for (let i = 0; i < this.grid; ++i) {
-      let samePiece = 1, prevPiece = null;
+      let samePiece = 1,
+        prevPiece = null;
       for (let j = 0; j < i + 1; ++j) {
-        const CURRENT_INDEX = (this.grid - i) + ((this.grid + 1) * j) - 1;
+        const CURRENT_INDEX = this.grid - i + (this.grid + 1) * j - 1;
         if (prevPiece === this.board[CURRENT_INDEX] && this.board[CURRENT_INDEX] !== NA) {
           samePiece++;
           if (samePiece === this.pieceWinCount) {
@@ -253,9 +254,10 @@ class TicTacToe {
     }
 
     for (let i = 1; i < this.grid; ++i) {
-      let samePiece = 1, prevPiece = null;
+      let samePiece = 1,
+        prevPiece = null;
       for (let j = 0; this.grid - i - j > 0; ++j) {
-        const CURRENT_INDEX = (i * this.grid) + ((this.grid + 1) * j);
+        const CURRENT_INDEX = i * this.grid + (this.grid + 1) * j;
         if (prevPiece === this.board[CURRENT_INDEX] && this.board[CURRENT_INDEX] !== NA) {
           samePiece++;
           if (samePiece === this.pieceWinCount) {
@@ -271,9 +273,10 @@ class TicTacToe {
 
     // check diag /
     for (let i = 0; i < this.grid; ++i) {
-      let samePiece = 1, prevPiece = null;
+      let samePiece = 1,
+        prevPiece = null;
       for (let j = 0; j < i + 1; ++j) {
-        const CURRENT_INDEX = i + (j * this.grid) - j;
+        const CURRENT_INDEX = i + j * this.grid - j;
         if (prevPiece === this.board[CURRENT_INDEX] && this.board[CURRENT_INDEX] !== NA) {
           samePiece++;
           if (samePiece === this.pieceWinCount) {
@@ -288,9 +291,10 @@ class TicTacToe {
     }
 
     for (let i = 1; i < this.grid; ++i) {
-      let samePiece = 1, prevPiece = null;
+      let samePiece = 1,
+        prevPiece = null;
       for (let j = 0; this.grid - i - j > 0; ++j) {
-        const CURRENT_INDEX = ((this.grid * (i + 1)) - 1) + ((this.grid - 1) * j);
+        const CURRENT_INDEX = this.grid * (i + 1) - 1 + (this.grid - 1) * j;
         if (prevPiece === this.board[CURRENT_INDEX] && this.board[CURRENT_INDEX] !== NA) {
           samePiece++;
           if (samePiece === this.pieceWinCount) {
diff --git a/lib/script.js b/lib/script.js
index a31017e..4b15e66 100644
--- a/lib/script.js
+++ b/lib/script.js
@@ -79,9 +79,9 @@ SELECT_GRID.addEventListener('change', () => {
 
   setNewGame(
     'The depth has been optimized in relation to the grid value to ' +
-    'improve the calculation speed. You can adjust the depth value, ' +
-    'but keep in mind that higher values for "depth and grid" will ' +
-    'will take more time to calculate or might even crash the page.'
+      'improve the calculation speed. You can adjust the depth value, ' +
+      'but keep in mind that higher values for "depth and grid" will ' +
+      'will take more time to calculate or might even crash the page.'
   );
 });
 
@@ -127,7 +127,7 @@ function generateCells() {
     for (let j = 0; j < Game.grid; ++j) {
       const square = document.createElement('span');
       square.className = 'cell';
-      square.style.animationDelay = `${(i * 0.1) + (j * 0.1) + 0.1}s`;
+      square.style.animationDelay = `${i * 0.1 + j * 0.1 + 0.1}s`;
 
       square.addEventListener('click', () => makeMove(i, j));
 
diff --git a/readme.md b/readme.md
index 7162b56..50f11db 100644
--- a/readme.md
+++ b/readme.md
@@ -24,4 +24,3 @@ node dev
 ```
 
 Then open `localhost:3000` in your browser.
-
diff --git a/tests.js b/tests.js
index 1e8cdc1..6afe777 100644
--- a/tests.js
+++ b/tests.js
@@ -6,53 +6,15 @@ let failedTests = 0;
 
 const fbfWinners = [NA, P1, P2, P1, P2, P1, P2, P1, P2];
 const fbfBoardStates = [
-  [
-    P2, NA, NA, P2,
-    NA, P1, NA, NA,
-    NA, NA, P2, NA,
-    P1, NA, NA, P1
-  ],
-  [
-    NA, NA, P1, NA,
-    NA, P1, NA, NA,
-    P1, NA, NA, NA,
-    NA, NA, NA, NA
-  ],[
-    NA, NA, NA, NA,
-    NA, NA, NA, P2,
-    NA, NA, P2, NA,
-    NA, P2, NA, NA
-  ],[
-    NA, P1, NA, NA,
-    NA, NA, P1, NA,
-    NA, NA, NA, P1,
-    NA, NA, NA, NA
-  ],[
-    NA, NA, NA, NA,
-    P2, NA, NA, NA,
-    NA, P2, NA, NA,
-    NA, NA, P2, NA
-  ],[
-    NA, NA, NA, NA,
-    NA, NA, P1, NA,
-    NA, P1, NA, NA,
-    P1, NA, NA, NA
-  ],[
-    NA, NA, NA, NA,
-    NA, P2, NA, NA,
-    NA, NA, P2, NA,
-    NA, NA, NA, P2
-  ],[
-    NA, NA, NA, P1,
-    NA, NA, P1, NA,
-    NA, P1, NA, NA,
-    NA, NA, NA, NA
-  ],[
-    P2, NA, NA, NA,
-    NA, P2, NA, NA,
-    NA, NA, P2, NA,
-    NA, NA, NA, NA
-  ],
+  [P2, NA, NA, P2, NA, P1, NA, NA, NA, NA, P2, NA, P1, NA, NA, P1],
+  [NA, NA, P1, NA, NA, P1, NA, NA, P1, NA, NA, NA, NA, NA, NA, NA],
+  [NA, NA, NA, NA, NA, NA, NA, P2, NA, NA, P2, NA, NA, P2, NA, NA],
+  [NA, P1, NA, NA, NA, NA, P1, NA, NA, NA, NA, P1, NA, NA, NA, NA],
+  [NA, NA, NA, NA, P2, NA, NA, NA, NA, P2, NA, NA, NA, NA, P2, NA],
+  [NA, NA, NA, NA, NA, NA, P1, NA, NA, P1, NA, NA, P1, NA, NA, NA],
+  [NA, NA, NA, NA, NA, P2, NA, NA, NA, NA, P2, NA, NA, NA, NA, P2],
+  [NA, NA, NA, P1, NA, NA, P1, NA, NA, P1, NA, NA, NA, NA, NA, NA],
+  [P2, NA, NA, NA, NA, P2, NA, NA, NA, NA, P2, NA, NA, NA, NA, NA],
 ];
 
 console.log('============ 4x4 - piece 3 win state tests ============ ');