Here is the full list of all 64 Dark Chess achievements.
First draw
Restart the same campaign level 10 times
Get your piece converted
Lose a piece in unnatural way
Using a Knight simultaneously attack the enemy King and Queen
Deliver chekmate after moving a Knight
Promote the Pawn to anything but the Queen
Beat more than one Queen in the game
Make fist move after being AFK (for 2 mins)
For this checkmate to be possible, the squares in front of the king must be blocked by its own pieces.
Lose 5 games in a row
First lose
Get your King captured from the fog
Play more than our Tester (more than 7 games)
Win the game when all the pawns are lost
Win 5 games in a row
Block your bishop with your own pieces
Deliver checkmate after moving a Pawn
First win
Win game in less than 2 minutes
Make first move E2-E4
Finished Tutorial
Go back in time during the match
Capture 1000 pieces
Capture enemy King without winning the game
Castle the King under check
Solve all Puzzles in Campaign
Finish campaign faster than 2 hours
Finish the Campaign in one run
Finish the Campaign on 3 difficulty levels
Finish the 1st part of Campaign
Finish the 2st part of Campaign
Watched the credits till the end
Perform an en passant capture
Make more than 40 moves in the Campaign Finale
Defeat enemy King with fire
Playing vs Gengis Khan capture all Knights in 1 minute
Have 4 Queens on your side
Capture the enemy king with your own king
Kill enemy King with plague
Sacrifice queen twice in a game
Lose the game after 100 moves
Lose all cursed pieces at once
Lose by timer
Lose the game in one move
Deliver checkmate where the King is blocked on both sides by his own Rooks
Boden's Mate is a pattern in which two bishops checkmate the king via intersecting diagonals.
Checkmate enemy king with two rooks
No dialogue skipped through the Campaign
Capture the King with the Pawn
Have four pawns of the same colour on the same column
Promote 5 Pawns in one game
Create a battery of 2 rooks and a queen in the same line
Complete Shaka's labyrinth loosing only one King
Skip all dialogues
Win the game after 100 moves
Win by Scholar's mate
Checkmate in 2 moves
Win Dark Chess match in 4 moves
Win the game with 1 second remaining on the clock
Win PvP game by timer
Beat an opponent with an ELO rating of 50 points higher than yours
Beat an opponent with an ELO rating higher than yours
Win game without losing a Pawn