How to Get Every Secret Achievement on Chess.com (Quick Guide)

♟️ In-Game Tactical Achievements
Castle Victory: Deliver a checkmate move by castling (\(O-O\#\) or \(O-O-O\#\)) against a human opponent.
Killer King: Deliver a checkmate by moving your King, which must open up a discovered checkmate from another piece.
Full House: Win a completed live chess game without losing a single one of your minor or major pieces.
Nick of Time: Win a game with less than 1.0 second remaining on your game clock (easiest to hit naturally in fast Bullet chess).
Chess Marathon: Complete a single live match that lasts for more than 100 total moves.
Quick Knockout: Successfully checkmate your opponent in under 10 total moves during a live match. [1, 2, 3, 5, 6]

💻 Platform & Community Achievements
Searching for Bobby Fischer: Go to the Chess.com Master Games Database, type "Bobby Fischer" into the player search bar, and hit search.
Juggler: Have 20 or more separate Daily Chess games active and running at the exact same time.
Full Day: Spend a cumulative, total lifetime score of 24 hours actively solving puzzles.
Good Habit: Solve at least one tactics puzzle every day for 7 consecutive days.
Pen Pal: Accept or have active friends from at least 10 different countries around the world.
Good Read: Write a personal post on your Chess.com Blog that receives over 100 unique views. [1, 2, 3, 4, 5, 6]

🎄 Limited-Time Holiday Achievements
These 5 hidden achievements are locked throughout the year and can only be obtained during the Christmas holiday event (typically December 3 to January 6) by defeating the special holiday AI bots: [1, 2]
Precious Snowflake: Defeat the Powder the Snowman bot.
Nutcracker: Defeat the Eve the Elf bot.
Full Stocking: Defeat the Santa bot.
Jingle Bell: Defeat the Dash the Reindeer bot.
Holly Berry: Defeat the Mrs. Claus bot.