// ==UserScript==
// @name Automated moves
// @namespace Violentmonkey Scripts
// @match https://chess.ytdraws.win/*
// @grant none
// @version 1.0
// @author -
// @description 14/04/2025, 16:54:06
// @license CC0
// ==/UserScript==
let basicBotInterval = null;
// --- Helper Functions (Existing + New) ---
/**
* Calculates Manhattan distance between two points.
* @param {number} x1
* @param {number} y1
* * @param {number} x2
* @param {number} y2
* @returns {number}
*/
function manhattanDistance(x1, y1, x2, y2) {
return Math.abs(x1 - x2) + Math.abs(y1 - y2);
}
/**
* Finds all coordinates of the player's pieces of a specific type.
* @param {number} pieceType - The type of piece (1-6).
* @returns {Array<Array<number>>} An array of [x, y] coordinates.
*/
function findMyPiecesOfType(pieceType) {
const pieces = [];
if (typeof selfId === 'undefined' || selfId === -1) return pieces;
for (let x = 0; x < boardW; x++) {
for (let y = 0; y < boardH; y++) {
if (board[x][y] === pieceType && teams[x][y] === selfId) {
pieces.push([x, y]);
}
}
}
return pieces;
}
/**
* Finds all coordinates of the player's King(s).
* @returns {Array<Array<number>>} An array of [x, y] coordinates.
*/
function findMyKings() {
return findMyPiecesOfType(6); // 6 is King
}
/**
* Checks if the player only has King(s) left.
* @returns {boolean} True if only Kings remain, false otherwise.
*/
function isOnlyKingLeft() {
if (typeof selfId === 'undefined' || selfId === -1) return false;
for (let x = 0; x < boardW; x++) {
for (let y = 0; y < boardH; y++) {
// If we find a piece belonging to us that is NOT a King (type 6)
if (teams[x][y] === selfId && board[x][y] !== 6 && board[x][y] !== 0) {
return false; // Found a non-king piece
}
}
}
return true; // No non-king pieces found
}
/**
* Checks if a specific square is attacked by any enemy piece.
* (Same as before - potentially inefficient)
* @param {number} targetX - The x-coordinate of the square to check.
* @param {number} targetY - The y-coordinate of the square to check.
* @returns {boolean} True if the square is under attack, false otherwise.
*/
function isSquareAttacked(targetX, targetY) {
if (typeof selfId === 'undefined' || selfId === -1) return false;
if (typeof generateLegalMoves === 'undefined') return false; // Safety check
for (let x = 0; x < boardW; x++) {
for (let y = 0; y < boardH; y++) {
if (board[x][y] !== 0 && teams[x][y] !== selfId && teams[x][y] !== 0) {
try {
const enemyMoves = generateLegalMoves(x, y, board, teams);
for (const move of enemyMoves) {
if (move[0] === targetX && move[1] === targetY) {
return true;
}
}
} catch (e) {
// console.error(`Error generating moves for enemy at ${x},${y} when checking attack on ${targetX},${targetY}:`, e);
}
}
}
}
return false;
}
/**
* Finds the coordinates of the nearest neutral (Team 0) piece.
* @param {number} fromX - The starting X coordinate.
* @param {number} fromY - The starting Y coordinate.
* @returns {Array<number> | null} Coordinates [x, y] of the nearest neutral piece, or null if none found.
*/
function findNearestNeutralPiece(fromX, fromY) {
let nearestPos = null;
let minDistance = Infinity;
for (let x = 0; x < boardW; x++) {
for (let y = 0; y < boardH; y++) {
// Team 0 is assumed to be neutral/white/unclaimed
if (teams[x][y] === 0 && board[x][y] !== 0) {
const dist = manhattanDistance(fromX, fromY, x, y);
if (dist < minDistance) {
minDistance = dist;
nearestPos = [x, y];
}
}
}
}
return nearestPos;
}
/**
* Checks if a player's piece is "idle" (not attacking anything and not under attack).
* @param {number} pieceX The piece's X coordinate.
* @param {number} pieceY The piece's Y coordinate.
* @param {Array<Array<number>>} legalMoves The pre-calculated legal moves for this piece.
* @returns {boolean} True if the piece is idle, false otherwise.
*/
function isPieceIdle(pieceX, pieceY, legalMoves) {
// 1. Check if under attack
if (isSquareAttacked(pieceX, pieceY)) {
return false;
}
// 2. Check if any legal move is a capture
for (const move of legalMoves) {
const [toX, toY] = move;
// Is the destination occupied by an enemy (not empty, not ours, not neutral)?
if (board[toX][toY] !== 0 && teams[toX][toY] !== selfId && teams[toX][toY] !== 0) {
return false; // This piece can attack
}
}
// If not attacked and cannot attack, it's idle
return true;
}
/**
* Finds the best move from a list of legal moves towards a target coordinate.
* Handles Knights (type 2) separately to mitigate looping issues.
* "Best" minimizes Manhattan distance, with tie-breaking for Knights.
* @param {number} pieceType The type (1-6) of the moving piece.
* @param {number} currentX The current X of the moving piece.
* @param {number} currentY The current Y of the moving piece.
* @param {Array<Array<number>>} legalMoves List of [toX, toY] moves.
* @param {number} targetX Target X coordinate.
* @param {number} targetY Target Y coordinate.
* @returns {Array<number> | null} The best move [toX, toY] or null if no suitable legal moves.
*/
function findBestMoveTowards(pieceType, currentX, currentY, legalMoves, targetX, targetY) {
let bestMove = null;
let minDistance = Infinity;
let madeProgress = false; // Did any move reduce distance?
const currentTargetDist = manhattanDistance(currentX, currentY, targetX, targetY);
// --- Knight-Specific Logic (Type 2) ---
if (pieceType === 2) {
let potentialMoves = [];
for (const move of legalMoves) {
const [toX, toY] = move;
// Skip moves onto own pieces
if (teams[toX]?.[toY] === selfId) continue;
const newDist = manhattanDistance(toX, toY, targetX, targetY);
potentialMoves.push({ move: move, dist: newDist });
}
// Sort potential moves: prioritize smaller distance, then break ties
potentialMoves.sort((a, b) => {
if (a.dist !== b.dist) {
return a.dist - b.dist; // Closer is better
} else {
// Tie-breaker: Prioritize move that reduces the LARGER axis difference more
const [ax, ay] = a.move;
const [bx, by] = b.move;
const aDiffX = Math.abs(ax - targetX);
const aDiffY = Math.abs(ay - targetY);
const bDiffX = Math.abs(bx - targetX);
const bDiffY = Math.abs(by - targetY);
const currentDiffX = Math.abs(currentX - targetX);
const currentDiffY = Math.abs(currentY - targetY);
if (currentDiffX > currentDiffY) { // Further in X direction
return aDiffX - bDiffX; // Smaller X difference is better
} else if (currentDiffY > currentDiffX) { // Further in Y direction
return aDiffY - bDiffY; // Smaller Y difference is better
} else {
return 0; // No preference if equidistant on axes
}
}
});
// Return the best valid move found
if (potentialMoves.length > 0) {
bestMove = potentialMoves[0].move;
// Basic loop avoidance: if best move doesn't decrease distance, maybe pick 2nd best if it does?
if(potentialMoves.length > 1 && potentialMoves[0].dist >= currentTargetDist && potentialMoves[1].dist < currentTargetDist) {
bestMove = potentialMoves[1].move;
// console.log(`Knight: Avoiding non-progress move, taking 2nd best.`);
}
}
return bestMove;
} else {
// --- Standard Logic (Non-Knights) ---
for (const move of legalMoves) {
const [toX, toY] = move;
// Skip moves onto own pieces
if (teams[toX]?.[toY] === selfId) continue;
const dist = manhattanDistance(toX, toY, targetX, targetY);
if (dist < minDistance) {
minDistance = dist;
bestMove = move;
if (dist < currentTargetDist) madeProgress = true;
}
}
// If the best move doesn't actually get closer, maybe reconsider?
// For non-knights, usually direct path is fine, but this could be added if needed.
// If best move doesn't make progress, but other moves *do*, prefer one that does?
if(bestMove && !madeProgress) {
let progressMove = null;
let progressMinDist = Infinity;
for (const move of legalMoves) {
const [toX, toY] = move;
if (teams[toX]?.[toY] === selfId) continue;
const dist = manhattanDistance(toX, toY, targetX, targetY);
if (dist < currentTargetDist && dist < progressMinDist) { // Found a move that makes progress
progressMinDist = dist;
progressMove = move;
}
}
if(progressMove) {
// console.log(`Non-Knight: Prioritizing progress move over non-progress best move.`);
bestMove = progressMove;
}
}
return bestMove;
}
}
/**
* Checks if moving a high-value piece (Rook/Queen) to a square is acceptably safe.
* Currently just checks if the destination square is attacked.
* @param {number} toX Destination X.
* @param {number} toY Destination Y.
* @returns {boolean} True if the move is considered safe enough, false otherwise.
*/
function isHunterMoveSafe(toX, toY) {
// For now, "safe enough" means the destination isn't directly attacked.
// Could be expanded (e.g., allow if capturing equally valuable piece).
return !isSquareAttacked(toX, toY);
}
/**
* Counts the number of Rooks (4) and Queens (5) the player controls.
* @returns {number} The total count of Rooks and Queens.
*/
function countMyHunterPieces() {
let count = 0;
if (typeof selfId === 'undefined' || selfId === -1) return 0;
for (let x = 0; x < boardW; x++) {
for (let y = 0; y < boardH; y++) {
if (teams[x][y] === selfId && (board[x][y] === 4 || board[x][y] === 5)) {
count++;
}
}
}
return count;
}
/**
* Finds the coordinates of the nearest enemy King (piece type 6).
* @param {number} fromX - The starting X coordinate.
* @param {number} fromY - The starting Y coordinate.
* @returns {Array<number> | null} Coordinates [x, y] of the nearest enemy king, or null if none found.
*/
function findNearestEnemyKing(fromX, fromY) {
let nearestPos = null;
let minDistance = Infinity;
for (let x = 0; x < boardW; x++) {
for (let y = 0; y < boardH; y++) {
// Check for King (6) that is NOT ours and NOT neutral (0)
if (board[x][y] === 6 && teams[x][y] !== selfId && teams[x][y] !== 0) {
const dist = manhattanDistance(fromX, fromY, x, y);
if (dist < minDistance) {
minDistance = dist;
nearestPos = [x, y];
}
}
}
}
return nearestPos;
}
/**
* Finds the coordinates of the nearest *prioritized* neutral (Team 0) piece.
* Priority: Queens/Rooks > Other Pieces. Distance breaks ties within priority.
* @param {number} fromX - The starting X coordinate.
* @param {number} fromY - The starting Y coordinate.
* @returns {Array<number> | null} Coordinates [x, y] of the best neutral target, or null if none found.
*/
function findPrioritizedNearestNeutralPiece(fromX, fromY) {
let bestHighPriorityTarget = { pos: null, dist: Infinity }; // Rooks (4), Queens (5)
let bestLowPriorityTarget = { pos: null, dist: Infinity }; // Others (1, 2, 3, 6)
for (let x = 0; x < boardW; x++) {
for (let y = 0; y < boardH; y++) {
// Team 0 is assumed to be neutral/white/unclaimed
if (teams[x][y] === 0 && board[x][y] !== 0) {
const pieceType = board[x][y];
const dist = manhattanDistance(fromX, fromY, x, y);
// Check if it's a high-priority target (Rook or Queen)
if (pieceType === 4 || pieceType === 5) {
if (dist < bestHighPriorityTarget.dist) {
bestHighPriorityTarget.dist = dist;
bestHighPriorityTarget.pos = [x, y];
}
} else { // Low priority target
if (dist < bestLowPriorityTarget.dist) {
bestLowPriorityTarget.dist = dist;
bestLowPriorityTarget.pos = [x, y];
}
}
}
}
}
// Return the high-priority target if found, otherwise the low-priority one
if (bestHighPriorityTarget.pos) {
// console.log(`Prioritized Neutral Target: High Prio [${bestHighPriorityTarget.pos}] at dist ${bestHighPriorityTarget.dist}`);
return bestHighPriorityTarget.pos;
} else if (bestLowPriorityTarget.pos) {
// console.log(`Prioritized Neutral Target: Low Prio [${bestLowPriorityTarget.pos}] at dist ${bestLowPriorityTarget.dist}`);
return bestLowPriorityTarget.pos;
}
return null; // No neutral pieces found
}
/**
* The main logic function for the bot, run periodically.
*/
function basicBotTurnLogic() {
// --- Pre-computation Checks ---
if (gameOver || typeof selfId === 'undefined' || selfId === -1 || typeof board === 'undefined' || typeof teams === 'undefined' || typeof generateLegalMoves === 'undefined' || typeof send === 'undefined' || typeof boardW === 'undefined' || typeof curMoveCooldown === 'undefined') {
return; // Not ready
}
if (curMoveCooldown > 220) {
return; // On cooldown
}
let actionTakenThisTurn = false; // Flag to prevent multiple actions
const pieceMovesCache = {}; // Cache moves for potential reuse
// --- Priority 1: King Safety ---
const myKings = findMyKings();
for (const kingPos of myKings) {
const [kingX, kingY] = kingPos;
if (isSquareAttacked(kingX, kingY)) {
console.log(`BasicBot: King at ${kingX},${kingY} is under attack! Finding safe move.`);
try {
const kingMoves = generateLegalMoves(kingX, kingY, board, teams);
let safeMove = null;
let desperationMove = null;
for (const move of kingMoves) { // Find best escape
const [toX, toY] = move;
if (teams[toX]?.[toY] === selfId) continue;
if (!isSquareAttacked(toX, toY)) { safeMove = move; break; }
else if (!desperationMove) { desperationMove = move; }
}
if (safeMove) { // Execute safe move
console.log(`BasicBot: Moving King from ${kingX},${kingY} to SAFE square ${safeMove[0]},${safeMove[1]}.`);
send(new Uint16Array([kingX, kingY, safeMove[0], safeMove[1]]));
actionTakenThisTurn = true;
} else if (desperationMove) { // Execute desperation move
console.warn(`BasicBot: No safe escape! Moving King from ${kingX},${kingY} to potentially UNSAFE square ${desperationMove[0]},${desperationMove[1]}.`);
send(new Uint16Array([kingX, kingY, desperationMove[0], desperationMove[1]]));
actionTakenThisTurn = true;
} else { console.error(`BasicBot: King at ${kingX},${kingY} attacked, NO legal moves!`); }
} catch (e) { console.error(`BasicBot: Error processing King escape @ ${kingX},${kingY}:`, e); }
if (actionTakenThisTurn) return; // End turn
}
}
// --- Priority 2: Standard Capture Opportunity ---
if (actionTakenThisTurn) return;
for (let x = 0; x < boardW; x++) {
for (let y = 0; y < boardH; y++) {
if (teams[x]?.[y] === selfId && board[x][y] !== 0 && board[x][y] !== 6) { // Our piece, not King
const pieceType = board[x][y];
try {
const legalMoves = pieceMovesCache[`${x},${y}`] || generateLegalMoves(x, y, board, teams);
if (!pieceMovesCache[`${x},${y}`]) pieceMovesCache[`${x},${y}`] = legalMoves;
for (const move of legalMoves) {
const [toX, toY] = move;
const targetPiece = board[toX]?.[toY];
const targetTeam = teams[toX]?.[toY];
// Is it a capture of an enemy piece?
if (targetPiece !== 0 && targetTeam !== selfId && targetTeam !== 0) {
// ** Hunter Safety Check for Capture **
if (pieceType === 4 || pieceType === 5) { // Is the capturing piece a Rook or Queen?
if (!isHunterMoveSafe(toX, toY)) {
console.log(`BasicBot: Hunter (${pieceType}) at ${x},${y} avoiding UNSAFE capture at ${toX},${toY}.`);
continue; // Skip this specific capture attempt
}
}
// If safe (or not a hunter), proceed with capture
console.log(`BasicBot: Capture! Moving ${pieceType} from ${x},${y} to ${toX},${toY}`);
send(new Uint16Array([x, y, toX, toY]));
actionTakenThisTurn = true;
break; // Exit inner loop (capture found)
}
}
} catch (e) { /* Handle error */ }
}
if (actionTakenThisTurn) break; // Exit outer loop
}
if (actionTakenThisTurn) break; // Exit loops if standard capture made
}
if (actionTakenThisTurn) return;
// --- Priority 3: Lone King Moves Towards Prioritized Neutral (If Safe) ---
if (actionTakenThisTurn) return;
const onlyKingLeft = isOnlyKingLeft();
if (onlyKingLeft && myKings.length > 0) {
const [kingX, kingY] = myKings[0];
if (!isSquareAttacked(kingX, kingY)) { // Only if King is currently safe
const nearestNeutral = findPrioritizedNearestNeutralPiece(kingX, kingY);
if (nearestNeutral) {
const [targetX, targetY] = nearestNeutral;
const targetType = board[targetX]?.[targetY] || '?';
try {
const kingMoves = pieceMovesCache[`${kingX},${kingY}`] || generateLegalMoves(kingX, kingY, board, teams);
// Use the modified findBestMoveTowards (though King is not type 2)
const bestMove = findBestMoveTowards(6, kingX, kingY, kingMoves, targetX, targetY);
if (bestMove) {
const [toX, toY] = bestMove;
if (!isSquareAttacked(toX, toY)) { // Check destination safety
console.log(`BasicBot: Lone King moving from ${kingX},${kingY} to SAFE square ${toX},${toY} towards neutral type ${targetType}.`);
send(new Uint16Array([kingX, kingY, toX, toY]));
actionTakenThisTurn = true;
} else { /* console.log(`BasicBot: Lone King best move to ${toX},${toY} is UNSAFE. Holding.`); */ }
}
} catch (e) { console.error(`BasicBot: Error processing Lone King move towards neutral:`, e); }
}
}
}
if (actionTakenThisTurn) return;
// --- Priority 4: Idle Pieces Move Towards Prioritized Neutral ---
if (actionTakenThisTurn) return;
if (onlyKingLeft) return; // Don't run if only king left
for (let x = 0; x < boardW; x++) {
for (let y = 0; y < boardH; y++) {
if (teams[x]?.[y] === selfId && board[x][y] !== 0 && board[x][y] !== 6) { // Our piece, not King
const pieceType = board[x][y];
try {
const legalMoves = pieceMovesCache[`${x},${y}`] || generateLegalMoves(x, y, board, teams);
if (!pieceMovesCache[`${x},${y}`]) pieceMovesCache[`${x},${y}`] = legalMoves;
if (isPieceIdle(x, y, legalMoves)) { // Check if idle first
const nearestNeutral = findPrioritizedNearestNeutralPiece(x, y);
if (nearestNeutral) {
const [targetX, targetY] = nearestNeutral;
const targetType = board[targetX]?.[targetY] || '?';
// Use the modified findBestMoveTowards
const bestMove = findBestMoveTowards(pieceType, x, y, legalMoves, targetX, targetY);
if (bestMove) {
const [toX, toY] = bestMove;
// ** Hunter Safety Check for Idle Move **
if (pieceType === 4 || pieceType === 5) { // Is the moving piece a Rook or Queen?
if (!isHunterMoveSafe(toX, toY)) {
console.log(`BasicBot: Hunter (${pieceType}) at ${x},${y} avoiding move to UNSAFE idle target square ${toX},${toY}.`);
continue; // Skip moving this piece this turn, maybe another idle piece can move.
}
}
// If safe (or not a hunter), proceed with move
console.log(`BasicBot: Moving idle piece ${pieceType} from ${x},${y} to ${toX},${toY} towards neutral type ${targetType}.`);
send(new Uint16Array([x, y, toX, toY]));
actionTakenThisTurn = true;
break; // Exit inner loop (idle piece moved)
}
}
}
} catch (e) { /* Handle error */ }
}
if (actionTakenThisTurn) break; // Exit outer loop
}
if (actionTakenThisTurn) break; // Exit loops if idle piece moved
}
// if (!actionTakenThisTurn) console.log("BasicBot: No actions taken this cycle.");
}
// --- startBasicBot and stopBasicBot functions remain the same ---
/**
* Starts the bot's periodic execution.
*/
function startBasicBot(intervalMs = 300) {
if (basicBotInterval) { console.log("BasicBot: Already running."); return; }
if (typeof selfId === 'undefined' || selfId === -1) {
console.warn("BasicBot: Cannot start, game not fully initialized (selfId unknown). Try again shortly.");
setTimeout(() => startBasicBot(intervalMs), 2000); return;
}
console.log(`BasicBot: Starting bot with ${intervalMs}ms interval. R/Q safety enabled.`);
if (basicBotInterval) clearInterval(basicBotInterval);
basicBotInterval = setInterval(basicBotTurnLogic, intervalMs);
}
/**
* Stops the bot's periodic execution.
*/
function stopBasicBot() {
if (basicBotInterval) { console.log("BasicBot: Stopping bot."); clearInterval(basicBotInterval); basicBotInterval = null; }
else { console.log("BasicBot: Bot is not running."); }
}
startBasicBot()
