Puzzle archive
Every puzzle from every year of Advent of Chess.
2025
24 puzzles from December 2025.
- 1Reach this position in 5 movesDifficulty: Medium
- 2Helpmate in 2Difficulty: Easy
- 3SerieshelpmateDifficulty: Easy
- 4Add King and mateDifficulty: Medium
- 5Selfmate in 2Difficulty: Easy
- 6Find the mateDifficulty: Medium
- 7Helpmate in 2!Difficulty: Easy
- 8Find the pieces behind the numbersDifficulty: Easy
- 9Retract White's last move, then mate in 2!Difficulty: Easy
- 10Checkless HelpmateDifficulty: Easy
- 11Place the piecesDifficulty: Hard
- 12Construct a game that ends with 6. BxRc4#Difficulty: Brutal
- 13Black makes 20 consecutive moves, then White mates in 1Difficulty: Easy
- 14Rotate the positionDifficulty: Easy
- 15Selfmate in 4 movesDifficulty: Hard
- 16Proof gameDifficulty: Medium
- 17HelpstalemateDifficulty: Medium
- 18Helpmate in 5Difficulty: Medium
- 19Mate in 2Difficulty: Easy
- 20RetractorDifficulty: Hard
- 21Get to this position in 10.5 movesDifficulty: Hard
- 22Black plays 37 moves in a row, then White mates in 1Difficulty: Medium
- 23What were the last 7 moves?Difficulty: Brutal
- 24Tacu's EnigmaDifficulty: Holy hell