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@@ -273,7 +273,7 @@ <h1 id="heuristics">Heuristics</h1>
 </table>
 <p>The evaluation features are used in several classes.</p>
 <h2 id="evaluation-function">Evaluation Function</h2>
-<p><a href="https://github.com/chesslablab/php-chess/blob/main/tests/unit/EvalArrayTest.php">Chess\EvalArray</a> allows to transform a FEN position to decimal numbers between -1 and +1. -1 is the best possible evaluation for Black and +1 the best possible evaluation for White. Both forces being set to 0 means they're balanced.</p>
+<p><a href="https://github.com/chesslablab/php-chess/blob/main/tests/unit/EvalArrayTest.php">Chess\EvalArray</a> allows to transform a FEN position to numbers between -1 and +1. -1 is the best possible evaluation for Black and +1 the best possible evaluation for White. Both forces being set to 0 means they're balanced.</p>
 <pre><code class="language-php">use Chess\EvalArray;
 use Chess\FenToBoardFactory;
 use Chess\Function\CompleteFunction;
@@ -367,7 +367,24 @@ <h2 id="evaluation-function">Evaluation Function</h2>
 
 )
 </code></pre>
-<p>The relative value of a position in FEN format without considering checkmate can be obtained by adding the above values.</p>
+<p>As chess champion William Steinitz pointed out, a strong position can be created by accumulating small advantages. The relative value of the position without considering checkmate is obtained by counting the advantages in the evaluation array.</p>
+<pre><code class="language-php">use Chess\EvalArray;
+use Chess\FenToBoardFactory;
+use Chess\Function\CompleteFunction;
+
+$fen = 'rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -';
+
+$board = FenToBoardFactory::create($fen);
+
+$normd = EvalArray::normalization(new CompleteFunction(), $board);
+$count = EvalArray::count($normd);
+
+echo $count;
+</code></pre>
+<pre><code class="language-text">1
+</code></pre>
+<p>In this example, one evaluation feature is favoring White.</p>
+<p>An alternative way to look at it is to add up the values ​​in the evaluation array.</p>
 <pre><code class="language-php">use Chess\EvalArray;
 use Chess\FenToBoardFactory;
 use Chess\Function\CompleteFunction;
@@ -382,7 +399,7 @@ <h2 id="evaluation-function">Evaluation Function</h2>
 </code></pre>
 <pre><code class="language-text">0.24
 </code></pre>
-<p>In this example, White is slightly better than Black because the value obtained is a positive number.</p>
+<p>White is slightly better than Black because the value obtained is a positive number.</p>
 <p>This is an estimate that suggests who may be better without considering checkmate. Please note that a heuristic evaluation is not the same thing as a chess calculation. Heuristic evaluations are often correct but may fail because they are based on probabilities.</p>
 <h2 id="oscillations-by-name-in-the-time-domain">Oscillations by Name in the Time Domain</h2>
 <p><a href="https://github.com/chesslablab/php-chess/blob/main/tests/unit/SanHeuristicsTest.php">Chess\SanHeuristics</a> returns the continuous oscillations of an evaluation feature in the time domain.</p>

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@@ -288,5 +288,5 @@ <h4 class="modal-title" id="keyboardModalLabel">Keyboard Shortcuts</h4>
 
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