Conkers are the shiny brown seeds of the horse chestnut tree, and they’re also the name of a traditional children’s game in Britain and Ireland where those seeds are used as “weapons” on strings to smash an opponent’s conker.

Quick Scoop

What conkers are

  • They are the hard, glossy brown seeds found inside the prickly green cases of the horse chestnut tree, usually falling in early autumn.
  • People often use the word conker for the seed itself, the game played with it, and sometimes even loosely for the tree.
  • They look a bit like edible chestnuts, but they are not the same species and are not considered safe to eat.

The basic game of conkers

  • Two players each thread a conker onto a string (often an old shoelace) by making a small hole through the seed.
  • Players take turns: one lets their conker dangle, the other swings theirs to try to hit and crack or smash the opponent’s.
  • The game ends when one conker breaks; the intact one is the winner and can “carry” its victories as a score (a “one-er”, “two-er”, etc.).

Fun extra rules and culture

  • Playground traditions include shouting “strings” or “stringsies” for an extra turn if the strings tangle, and “stamps” or “stampsies” to try stamping on a fallen conker.
  • Many kids try to harden their conkers by baking them, soaking them in vinegar, or even coating them, though this is usually seen as cheating.
  • While some say the game is less common in school playgrounds today, there are still organised events like the World Conker Championships in England and other local tournaments.

A quick example

Imagine it’s October, you’ve just picked a perfect, shiny conker from the ground. You drill a hole through the middle, thread an old lace, tie a knot, and face your friend in the playground. Their first swing glances off; your second blow lands squarely and splits their conker in two—yours survives, and from that moment it’s proudly known as a “one-er”.

Information gathered from public forums or data available on the internet and portrayed here.