Editing Chess clock (section)

=== Analog game clocks ===
[[File:Garde Schachuhr 1.jpg|thumb|A typical analog chess clock]]

[[Analog clock]]s are equipped with a "flag" that falls to indicate the exact moment the player's time has expired. Analog clocks use mechanical buttons. Pressing the button on one player's side physically stops the movement of that player's clock and releases the hold on the opponent's.

The drawbacks of the mechanical clocks include accuracy and matching of the two clocks, and matching of the indicators (flags) of time expiration. Additional time cannot easily be added for more complex time controls, especially those that call for an increment or delay on every move, such as some forms of [[byoyomi]].