Math
Nerdle
Guess the equation with number hints
equation
Math
Mathler
Find the hidden calculation that equals the target number
calculation
Math
Daily Chess Puzzle
Solve a daily chess puzzle
chesspuzzlestrategy
Math
Matle
Wordle for chess; reveal hidden squares in a checkmate position
chesspuzzlestrategy
Math
Sudoku
Solve a daily sudoku
logicnumbers
Math
Elementle
Work your way to the correct element by using the atomic number, group, period, and other facts!
sciencechemistry
Math
Numberle
Guess the hidden number with numerical hints
numberslogic
Math
Primel
Guess the 5-digit prime number
numbers
Math
Sudoku Shift
A shape-shifting Sudoku challenge--progress from 4x4 to 9x9 in one sitting.
sudokulogic
Math
Crossnumber
A unique mini-crossword puzzle where all the answers are numbers.
crosswordcrossnumberpuzzle
Math
Royal Family
Fill a 5×5 grid with all 6 chess pieces—one per cage—so no piece attacks another.
logicchesspuzzle