diff --git a/highcharts-api/highcharts/14-synchronized-pies/index.html b/highcharts-api/highcharts/14-synchronized-pies/index.html
index 6c800fd..dcda198 100644
--- a/highcharts-api/highcharts/14-synchronized-pies/index.html
+++ b/highcharts-api/highcharts/14-synchronized-pies/index.html
@@ -7,6 +7,7 @@
   <meta name="viewport" content="width=device-width, initial-scale=1">
 
   <script src="https://code.highcharts.com/highcharts.js"></script>
+  <script src="https://code.highcharts.com/modules/accessibility.js"></script>
 
 </head>
 
@@ -14,4 +15,4 @@
   <div id="container"></div>
 </body>
 
-<script src="main.js"></script>
\ No newline at end of file
+<script src="main.js"></script>
diff --git a/highcharts-api/highcharts/14-synchronized-pies/main.js b/highcharts-api/highcharts/14-synchronized-pies/main.js
index e69de29..dbe9240 100644
--- a/highcharts-api/highcharts/14-synchronized-pies/main.js
+++ b/highcharts-api/highcharts/14-synchronized-pies/main.js
@@ -0,0 +1,132 @@
+const data = [
+  { name: 'Commerce', y: 52 },
+  { name: 'Engineering', y: 20 },
+  { name: 'Financial Services', y: 15 },
+  { name: 'Logistics, Aviation & Shipping', y: 5 },
+  { name: 'Seafood & Marine', y: 7 },
+  { name: 'Corporate Services & others', y: 1 }
+];
+
+Highcharts.Pointer.prototype.reset = function() {
+    return undefined;
+};
+
+Highcharts.chart('container', {
+    chart: {
+        type: 'pie',
+        events: {
+            load: function() {
+                const chart = this;
+                const { series } = chart;
+                const legendItems = chart.legend.allItems;
+
+                chart.customTooltips = [ chart.tooltip ];
+                series.slice(1).forEach(s => {
+                    const tooltip = new Highcharts.Tooltip(chart, {
+                        ...chart.options.tooltip,
+                        animation: false
+                    });
+                    tooltip.pointer = chart.tooltip.pointer;
+                    chart.customTooltips.push(tooltip);
+                });
+
+                legendItems?.forEach(legendItem => {
+                    const legendGroup = legendItem.legendItem?.group;
+                    if (!legendGroup?.element) return;
+                    const legendItemElement = legendGroup.element;
+
+                    legendItemElement.addEventListener('mouseover', (e) => {
+                        if (!legendItem.visible) return;
+
+                        const activePoints = series.flatMap(s => {
+                            const point = s.points[legendItem.index];
+                            point.onMouseOver();
+                            return point;
+                        });
+
+                        activePoints.forEach((p, i) =>
+                            chart.customTooltips[i].refresh(p));
+                    });
+
+                    legendItemElement.addEventListener('mouseout', () => {
+                        series.forEach(s => {
+                            s.points.forEach(point => {
+                                if (legendItem.index !== point.index) {
+                                    point.onMouseOut();
+                                    point.setState('normal');
+                                }
+                            });
+                        });
+
+                        chart.customTooltips.forEach(t => t.hide(0));
+                    });
+                });
+            }
+        }
+    },
+    tooltip: {
+        animation: false
+    },
+    plotOptions: {
+        pie: {
+            dataLabels: {
+                enabled: false
+            },
+            showInLegend: true,
+            point: {
+                events: {
+                    mouseOver: function() {
+                        const point = this;
+                        const { chart } = this.series;
+                        const activePoints = [point];
+
+                        chart.series.forEach(s => {
+                            if (point.series.index !== s.index) {
+                                s.points[point.index].setState('hover');
+                                activePoints.push(s.points[point.index]);
+                            }
+                        });
+
+                        activePoints.forEach((p, i) =>
+                            chart.customTooltips[i].refresh(p));
+                    },
+                    mouseOut: function() {
+                        const point = this;
+                        const { chart } = this.series;
+
+                        chart.customTooltips.forEach(t => t.hide(0));
+                    }
+                }
+            }
+        }
+    },
+    series: [
+    {
+        data,
+        center: ['25%', '50%'],
+        point: {
+            events: {
+                legendItemClick: function() {
+                    const { point } = this;
+                    const { chart } = this.series;
+
+                    chart.series.forEach(s => {
+                        if (point.series.index === s.index) return;
+                        const nextPoint = s.points[point.index];
+                        nextPoint.setVisible(point.visible, false);
+                        if (!point.visible) nextPoint.setState('inactive');
+                    });
+
+                    chart.customTooltips.forEach(t => t.hide(0));
+                    chart.redraw();
+                }
+            }
+        }
+    },
+    {
+        data,
+        center: ['75%', '50%'],
+        showInLegend: false
+    },
+  ]
+});