Chomp

Force the computer to take the poisoned top-left square.

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How to play

Force the computer to take the poisoned top-left square.

  • Choose any remaining square of the rectangular chocolate bar.
  • That square and every square at or below its row and at or to its right are removed.
  • The player who is forced to choose the poisoned top-left square loses.

Strategy tips

  • Avoid the poisoned square while any safe bite remains.
  • Try to leave a shape whose rows and columns balance each other.
  • Compare how much boundary each bite removes, not only its area.

Complete guide

Rules, scoring, and strategy

Chomp is played on a rectangular chocolate bar whose top-left square is poisoned. A bite removes its chosen square and the entire rectangle extending down and right; whoever takes the poisoned square loses.

A bite changes a whole corner

Selecting row r and column c removes every remaining square whose row is at least r and column is at least c. The surviving rows therefore always form a nonincreasing staircase.

The poison rule

The top-left square is legal but losing. Choosing it ends the round immediately and awards the win to the other player. Every other bite is safe for that turn.

Shape matters more than area

Removing many squares may leave a simple winning reply, while a smaller bite may preserve an awkward boundary. Compare the row widths and look for balanced or mirrored shapes.

Work backward from the corner

Late positions often contain one full top row and a short column. Identify which bites would force the opponent closer to the poison, then avoid handing over a shape with only one safe choice.

Questions players ask

Which square is poisoned?

The top-left square is poisoned in this implementation.

What exactly does one bite remove?

It removes the selected square plus every present square below it and to its right.

Can a player pass?

No. A player must choose a remaining square, even when only the poisoned square remains.