♟️🅰️1️⃣⬛

#a1 square #chess #chess notation #chessboard #rook corner #bottom left

🅰️1️⃣⬜

#algebraic notation #square coordinate #specific square #a1 square #corner square #square name

♟️⚘️(a1)❓¹

#chess notation #a1 square #algebraic notation #chess position #non-standard notation #hypothetical move