implemented "acht-damen algorithmus", seperated javascript from html, made a simple check function.

conflict still has some errors (damen despawn somethimes) and css is very simple.

app/routes/main_routes.py

@@ -1,5 +1,6 @@
-from flask import Blueprint, render_template
+from flask import Blueprint, jsonify, render_template, request
 from flask_login  import login_required, current_user
+import random
 
 main_bp = Blueprint("main", __name__)
 
@@ -11,3 +12,64 @@ def home():
 @login_required
 def dashboard():
     return render_template('dashboard.html', user=current_user)
+
+@main_bp.route("/check", methods=["POST"])
+def check():
+    data = request.json
+    board = data["board"]
+    row = data["row"]
+    col = data["col"]
+
+    for r in range(len(board)):
+        c = board[r]
+
+        if c == -1 or r == row:
+            continue
+
+        # gleiche Spalte
+        if c == col:
+            return jsonify({"valid": False})
+
+        # gleiche Diagonale
+        if abs(c - col) == abs(r - row):
+            return jsonify({"valid": False})
+
+    return jsonify({"valid": True})
+
+
+@main_bp.route("/solve")
+def solve():
+    n = 8
+    solutions = []
+    board = [-1] * n
+
+    def is_safe(row, col):
+        for r in range(row):
+            c = board[r]
+            if c == col or abs(c - col) == abs(r - row):
+                return False
+        return True
+
+    def backtrack(row):
+        if row == n:
+            solutions.append(board[:])
+            return
+
+        for col in range(n):
+            if is_safe(row, col):
+                board[row] = col
+                backtrack(row + 1)
+                board[row] = -1
+
+    backtrack(0)
+    return jsonify(solutions)
+
+@main_bp.route("/solve_rooks")
+def solve_rooks_route():
+    return jsonify(solve_rooks(8))
+
+def solve_rooks(n=8):
+    solution = list(range(n))
+    random.shuffle(solution)
+    return solution
+

app/static/css/dashboard.css

@@ -0,0 +1,155 @@
+body {
+    margin: 0;
+    font-family: Arial, sans-serif;
+    background: #f5f7fa;
+}
+
+/* 🔝 Navbar */
+.navbar {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    background: #1e293b;
+    color: white;
+    padding: 15px 30px;
+}
+
+.navbar a {
+    color: white;
+    margin-left: 15px;
+    text-decoration: none;
+}
+
+.navbar a:hover {
+    text-decoration: underline;
+}
+
+/* 📦 Layout */
+.container {
+    max-width: 900px;
+    margin: 30px auto;
+    padding: 10px;
+}
+
+/* 📇 Cards */
+.card {
+    background: white;
+    padding: 20px;
+    margin-bottom: 25px;
+    border-radius: 12px;
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
+}
+
+.game-card {
+    text-align: center;
+}
+
+/* ♟️ Board */
+.board-grid {
+    display: grid;
+    grid-template-columns: 30px repeat(8, 60px);
+    grid-template-rows: 30px repeat(8, 60px);
+    margin: 20px auto;
+    width: max-content;
+    border: 6px solid #1e293b;
+    border-radius: 10px;
+    overflow: hidden;
+}
+
+.label {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-weight: bold;
+    background: #aec8eb;
+    color: #1e293b;
+}
+
+
+
+.cell {
+    width: 60px;
+    height: 60px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 30px;
+    cursor: pointer;
+    transition: 0.2s;
+}
+
+.cell:hover {
+    transform: scale(1.05);
+}
+
+.white {
+    background: #e2e8f0;
+}
+
+.black {
+    background: #475569;
+    color: white;
+}
+
+.invalid {
+    background: #ef4444 !important;
+}
+
+/* 🎛️ Buttons */
+.controls {
+    margin-top: 15px;
+}
+
+.btn {
+    padding: 10px 15px;
+    margin: 5px;
+    border: none;
+    border-radius: 8px;
+    background: #3b82f6;
+    color: white;
+    cursor: pointer;
+}
+
+.btn:hover {
+    background: #2563eb;
+}
+
+.btn.secondary {
+    background: #64748b;
+}
+
+.btn.secondary:hover {
+    background: #475569;
+}
+
+.btn.danger {
+    background: #ef4444;
+}
+
+.btn.danger:hover {
+    background: #dc2626;
+}
+
+#queenList {
+    list-style: none;
+    padding: 0;
+}
+
+#queenList li {
+    padding: 5px;
+    background: #f1f5f9;
+    margin: 4px 0;
+    border-radius: 6px;
+}
+
+.mode-switch {
+    margin-bottom: 15px;
+}
+
+.mode-switch .btn {
+    margin: 5px;
+}
+
+.btn.active {
+    background: #22c55e;
+}

app/static/css/login.css

@@ -21,40 +21,11 @@ body {
     display: grid;
     place-items: center;
     font-family: "Geist Sans", system-ui, sans-serif;
+
+    background: linear-gradient(135deg, #c6dff4, #7c8384);
 }
 
-/* MAGNET EFFECT */
-.magnetic {
-    padding: 10px 20px;
-    border: none;
-    background: #4facfe;
-    color: white;
-    border-radius: 6px;
-    cursor: pointer;
-    font-size: 16px;
 
-    transition: transform 0.2s ease;
-}
-
-.magnetic:hover {
-    background: #2d8cf0;
-}
-
-/* Reset */
-* {
-    box-sizing: border-box;
-    margin: 0;
-    padding: 0;
-    font-family: Arial, Helvetica, sans-serif;
-}
-
-/* Page setup */
-body {
-    min-height: 100vh;
-    background: var(--primary-bg-color);
-}
-
-/* Navbar */
 nav {
     width: 100%;
     background: var(--nav-bg-color);
@@ -93,17 +64,38 @@ main h1 {
     margin-bottom: 20px;
 }
 
+main {
+    animation: fadeIn 0.8s ease;
+}
+
+@keyframes fadeIn {
+    from {
+        opacity: 0;
+        transform: translateY(15px);
+    }
+
+    to {
+        opacity: 1;
+        transform: translateY(0);
+    }
+}
+
+
 /* Form box */
 form {
-    background: var(--secondary-bg-color);
-    padding: 30px;
-    border-radius: 8px;
-    width: 300px;
+    background: rgba(255, 255, 255, 0.15);
+    backdrop-filter: blur(12px);
+    padding: 35px;
+    border-radius: 12px;
+    width: 320px;
     display: flex;
     flex-direction: column;
-    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
+
+    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
+    border: 1px solid rgba(255, 255, 255, 0.2);
 }
 
+
 /* Labels */
 label {
     margin-top: 10px;
@@ -112,30 +104,48 @@ label {
 }
 
 /* Inputs */
-input {
-    padding: 10px;
-    border: 1px solid #ccc;
-    border-radius: 6px;
+form {
+    background: rgba(255, 255, 255, 0.15);
+    backdrop-filter: blur(12px);
+    padding: 35px;
+    border-radius: 12px;
+    width: 320px;
+    display: flex;
+    flex-direction: column;
+
+    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
+    border: 1px solid rgba(255, 255, 255, 0.2);
 }
 
+
 /* Button */
-.button {
+button {
     margin-top: 20px;
-    padding: 10px;
+    padding: 12px;
     border: none;
-    background: #4facfe;
-    color: white;
-    border-radius: 6px;
+    background: linear-gradient(135deg, #e9eff5, #daebf0);
+    color: rgb(0, 0, 0);
+    border-radius: 8px;
     cursor: pointer;
     font-size: 16px;
+
+    transition: all 0.2s ease;
 }
 
 button:hover {
-    background: #2d8cf0;
+    transform: translateY(-2px);
+    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
 }
 
+button:active {
+    transform: scale(0.97);
+}
+
+
 /* Error message */
 .error {
     color: red;
     margin-bottom: 15px;
 }
+
+/* button anim */

app/static/js/dashboard.js

@@ -0,0 +1,199 @@
+let mode = "queens"; // oder "rooks"
+
+function setMode(newMode) {
+    mode = newMode;
+    resetBoard();
+
+    document.getElementById("btnQueens").classList.remove("active");
+    document.getElementById("btnRooks").classList.remove("active");
+
+    if (mode === "queens") {
+        document.getElementById("btnQueens").classList.add("active");
+    } else {
+        document.getElementById("btnRooks").classList.add("active");
+    }
+
+    drawBoard();
+}
+
+let board = Array(8).fill(-1);
+const boardDiv = document.getElementById("board");
+
+function getConflicts() {
+    let conflicts = [];
+
+    for (let r1 = 0; r1 < 8; r1++) {
+        if (board[r1] === -1) continue;
+
+        for (let r2 = r1 + 1; r2 < 8; r2++) {
+            if (board[r2] === -1) continue;
+
+            let c1 = board[r1];
+            let c2 = board[r2];
+
+            // 🔴 Türme: nur gleiche Spalte
+            if (mode === "rooks") {
+                if (c1 === c2) {
+                    conflicts.push([r1, c1]);
+                    conflicts.push([r2, c2]);
+                }
+            }
+
+            // 🔴 Damen: Spalte + Diagonale
+            else if (mode === "queens") {
+                if (
+                    c1 === c2 ||
+                    Math.abs(c1 - c2) === Math.abs(r1 - r2)
+                ) {
+                    conflicts.push([r1, c1]);
+                    conflicts.push([r2, c2]);
+                }
+            }
+        }
+    }
+
+    return conflicts;
+}
+
+function checkSolution() {
+    const status = document.getElementById("statusMessage");
+
+    const allPlaced = board.every(col => col !== -1);
+
+    if (!allPlaced) {
+        status.textContent = "❗ Noch nicht alle Figuren platziert.";
+        status.style.color = "orange";
+        return;
+    }
+
+    const conflicts = getConflicts();
+
+    if (conflicts.length > 0) {
+        status.textContent = "❌ Es gibt Konflikte!";
+        status.style.color = "red";
+        return;
+    }
+
+    status.textContent = "🎉 Perfekt gelöst!";
+    status.style.color = "green";
+}
+
+function drawBoard() {
+    boardDiv.innerHTML = "";
+    boardDiv.className = "board-grid";
+
+    const conflicts = getConflicts();
+    const letters = ["A", "B", "C", "D", "E", "F", "G", "H"];
+
+    for (let row = -1; row < 8; row++) {
+        for (let col = -1; col < 8; col++) {
+
+            const cell = document.createElement("div");
+
+            // 🔹 Ecke oben links
+            if (row === -1 && col === -1) {
+                cell.classList.add("label");
+            }
+
+            // 🔹 Buchstaben (oben)
+            else if (row === -1) {
+                cell.textContent = letters[col];
+                cell.classList.add("label");
+            }
+
+            // 🔹 Zahlen (links)
+            else if (col === -1) {
+                cell.textContent = 8 - row;
+                cell.classList.add("label");
+            }
+
+            // 🔹 echtes Spielfeld
+            else {
+                cell.classList.add("cell");
+
+                if ((row + col) % 2 === 0) {
+                    cell.classList.add("white");
+                } else {
+                    cell.classList.add("black");
+                }
+
+                if (board[row] === col) {
+                    cell.textContent = (mode === "queens") ? "♛" : "♜";
+
+                    if (conflicts.some(([r, c]) => r === row && c === col)) {
+                        cell.classList.add("invalid");
+                    }
+                }
+
+                cell.onclick = () => placeQueen(row, col);
+            }
+
+            boardDiv.appendChild(cell);
+        }
+    }
+
+    updateQueenList();
+}
+
+function placeQueen(row, col) {
+    if (board[row] === col) {
+        board[row] = -1;
+    } else {
+        board[row] = col;
+    }
+    drawBoard();
+    updateQueenList();
+}
+
+async function solve() {
+
+    if (mode === "rooks") {
+        const res = await fetch("/solve_rooks");
+        const solution = await res.json();
+
+        board = solution;
+        drawBoard();
+        return;
+    }
+
+    // Damen (wie vorher)
+    const res = await fetch("/solve");
+    const solution = await res.json();
+
+    board = Array.isArray(solution[0]) ? solution[0] : solution;
+    drawBoard();
+}
+
+
+function resetBoard() {
+    const status = document.getElementById("statusMessage");
+    board = Array(8).fill(-1);
+    drawBoard();
+    updateQueenList();
+    status.textContent = "";
+}
+
+drawBoard();
+
+function updateQueenList() {
+    const list = document.getElementById("queenList");
+    list.innerHTML = "";
+
+    const letters = ["A", "B", "C", "D", "E", "F", "G", "H"];
+
+    let count = 1;
+
+    for (let row = 0; row < 8; row++) {
+        if (board[row] !== -1) {
+            let col = board[row];
+
+            let pos = letters[col] + (8 - row);
+
+            const li = document.createElement("li");
+            li.textContent = `${mode === "queens" ? "Dame" : "Turm"} ${count}: ${pos}`;
+
+            list.appendChild(li);
+            count++;
+        }
+    }
+}

app/static/js/login.js

@@ -1,14 +1,32 @@
-const button = document.querySelector(".magnetic")
+const button = document.querySelector(".magnetic");
 
 button.addEventListener("mousemove", (e) => {
-    const rect = button.getBoundingClientRect()
+    const rect = button.getBoundingClientRect();
+    const x = e.clientX - rect.left - rect.width / 2;
+    const y = e.clientY - rect.top - rect.height / 2;
 
-    const x = e.clientX - rect.left - rect.width / 2
-    const y = e.clientY - rect.top - rect.height / 2
-
-    button.style.transform = `translate(${x * 0.3}px, ${y * 0.3}px)`
-})
+    button.style.transform = `translate(${x * 0.2}px, ${y * 0.2}px)`;
+});
 
 button.addEventListener("mouseleave", () => {
-    button.style.transform = "translate(0,0)"
-})
+    button.style.transform = "translate(0,0)";
+});
+
+const inputs = document.querySelectorAll("input");
+
+inputs.forEach(input => {
+    input.addEventListener("input", () => {
+        input.style.boxShadow = "0 0 8px rgba(79,172,254,0.6)";
+
+        setTimeout(() => {
+            input.style.boxShadow = "";
+        }, 300);
+    });
+});
+
+const form = document.querySelector("form");
+
+form.addEventListener("submit", () => {
+    button.innerText = "Logging in...";
+    button.style.opacity = "0.7";
+});

app/templates/dashboard.html

@@ -1,51 +1,78 @@
 <!DOCTYPE html>
-
-<html lang="en">
+<html lang="de">
 
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Dashboard</title>
+
+    <link rel="stylesheet" href="../static/css/dashboard.css">
 </head>
 
 <body>
 
-    <nav>
-        <a href="{{ url_for('main.dashboard') }}">Dashboard</a>
-        <a href="{{ url_for('login.logout') }}">Logout</a>
+    <!-- 🔝 Navbar -->
+    <nav class="navbar">
+        <div class="nav-left">♛ 8-Queens App</div>
+        <div class="nav-right">
+            <a href="{{ url_for('main.dashboard') }}">Dashboard</a>
+            <a href="{{ url_for('login.logout') }}">Logout</a>
+        </div>
     </nav>
 
+    <!-- 📦 Container -->
     <div class="container">
 
-        ```
-        <h1>Dashboard</h1>
+        <!-- 👤 User Card -->
+        <div class="card">
+            <h2>👋 Willkommen, {{ current_user.username }}</h2>
 
-        <p>Welcome back <strong>{{ current_user.username }}</strong> 👋</p>
+            <div class="user-info">
+                <p><strong>ID:</strong> {{ current_user.id }}</p>
+                <p><strong>Username:</strong> {{ current_user.username }}</p>
 
-        <div class="user-info">
-            <h3>Your Account</h3>
+                {% if current_user.email %}
+                <p><strong>Email:</strong> {{ current_user.email }}</p>
+                {% else %}
+                <p><strong>Email:</strong> Not set</p>
+                {% endif %}
 
-            <p><strong>User ID:</strong> {{ current_user.id }}</p>
-            <p><strong>Username:</strong> {{ current_user.username }}</p>
+                <p><strong>Erstellt:</strong> {{ current_user.created_at }}</p>
+            </div>
 
-            {% if current_user.email %}
-            <p><strong>Email:</strong> {{ current_user.email }}</p>
-            {% else %}
-            <p><strong>Email:</strong> Not set</p>
-            {% endif %}
-
-            <p><strong>Account created:</strong> {{ current_user.created_at }}</p>
-        </div>
-
-        <div class="logout">
             <form action="{{ url_for('login.logout') }}" method="post">
-                <button type="submit">Logout</button>
+                <button class="btn danger" type="submit">Logout</button>
             </form>
         </div>
-        ```
 
+        <div class="mode-switch">
+            <button class="btn active" onclick="setMode('queens')" id="btnQueens">♛ Damen</button>
+            <button class="btn secondary" onclick="setMode('rooks')" id="btnRooks">♜ Türme</button>
+        </div>
+
+
+        <!-- ♟️ Game Card -->
+        <div class="card game-card">
+            <h2>♟️ 8-Damen Spiel</h2>
+
+            <p id="statusMessage"></p>
+            <div class="board" id="board"></div>
+
+            <div class="controls">
+                <button class="btn" onclick="solve()">Solve</button>
+                <button class="btn" onclick="checkSolution()">Check</button>
+                <button class="btn secondary" onclick="resetBoard()">Reset</button>
+            </div>
+        </div>
+
+        <div class="card">
+            <h3>📋 Damen Positionen</h3>
+            <ul id="queenList"></ul>
+        </div>
     </div>
 
+    <script src="../static/js/dashboard.js"></script>
+
 </body>
 
 </html>

app/templates/index.html

@@ -21,7 +21,7 @@
 
             <nav>
                 <a href="/">Home</a>
-                <a href="/solver">Solver</a>
+                <a href="/dashboard">Solver</a>
 
                 {% if session.get('user_id') %}
                 <a href="/dashboard">Dashboard</a>

app/templates/login.html

@@ -14,7 +14,7 @@
     <nav>
         <ul>
             <li><a href="{{ url_for('login.login') }}"><span>Login</span></a></li>
-            <li><a href="{{ url_for('login.register') }}"><span></span>Create account</span></a></li>
+            <li><a href="{{ url_for('login.register') }}"><span>Create account</span></a></li>
         </ul>
     </nav>