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1k

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The Unknown Prison of Unknown Size

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Variant of lion and 100 zebras

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Clear board in Othello (Generalisation)

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Clear board in Othello

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Generalisation of Nim

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Meeting of hands on a clock

mathematics visual time

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Five logicians with one or two hats [7,8,9]

logical-deduction meta-knowledge

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630

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Maximize 'chains' in a Sudoku

optimization sudoku

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Agent 001's faulty delivery box

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608

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Clarifications on the unexpected hanging paradox

logical-deduction puzzle-creation explanation

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37

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Sudoku net that is always solvable

optimization sudoku

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669

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Product of sum of divisors of two numbers

mathematics number-theory

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0

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Packing circles in a rectangle [closed]

mathematics optimization packing

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Is progress possible by a duo in an infinite maze?

mazes

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19

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How many boxes are conductors?

mathematics visual optimization physics circuitry

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Is progress possible in an infinite maze?

mazes

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Tic Tac Toe Recursive

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Connect 4 Recursive

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What is a Smooth Word™?

pattern lateral-thinking word-property

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The origin of the blue eyes puzzle

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25 square puzzle

game pencil-and-paper-games

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mathematics geometry

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Create an impossible knight transformation

chess optimization reachability knight-moves

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3

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Largest word-square puzzle [duplicate]

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mathematics optimization physics

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100 Questions

Largest cages Killer Sudoku

The Unknown Prison of Unknown Size

Variant of lion and 100 zebras

Clear board in Othello (Generalisation)

Clear board in Othello

Generalisation of Nim

Meeting of hands on a clock

Five logicians with one or two hats [7,8,9]

Maximize 'chains' in a Sudoku

Agent 001's faulty delivery box

Clarifications on the unexpected hanging paradox

36-length snake in a 6x6 grid

Sudoku net that is always solvable

Product of sum of divisors of two numbers

Packing circles in a rectangle [closed]

Is progress possible by a duo in an infinite maze?

How many boxes are conductors?

Is progress possible in an infinite maze?

Tic Tac Toe Recursive

Connect 4 Recursive

What is a Smooth Word™?

The origin of the blue eyes puzzle

25 square puzzle

Icosikaitrigons

Create an impossible knight transformation

Largest word-square puzzle [duplicate]

5 logicians with 1 or 2 hats (Part II) [8,9,10]

$n$ couples crossing a river

Deceptive dice game

Use a circuit to multiply two resistances