adopted the European system, caused considerable complaint among American players who grew up in the 1960s and 1970s. This may have been a factor in the release of a Nostalgic edition, in a wooden box, reproducing the Classic edition of the early 1970s. Modern Stratego variations Electronic Stratego was introduced by Milton Bradley in 1982. It has features that make many aspects of the game strikingly different from those of classic Stratego. Each type of playing piece in Electronic Stratego has a unique series of bumps on its bottom that are read by the game's battery-operated touch-sensitive "board". When attacking another piece a player hits their Strike button, presses their piece and then the targeted piece: the game either rewards a successful attack or punishes a failed strike with an appropriate bit of music. In this way the players never know for certain the rank of the piece that wins the attack, only whether the attack wins, fails, or ties (similar to the role of the referee in the Chinese game of Luzhanqi). Instead of choosing to move a piece, a player can opt to "probe" an opposing piece by hitting the Probe button and pressing down on the enemy piece: the game then beeps out a rough approximation of the strength of that piece. There are no Bomb pieces: Bombs are set using pegs placed on a touch-sensitive "peg board" that is closed from view prior to the start of the game. Hence, it is possible for a player to have their piece occupying a square with a bomb on it. If an opposing piece lands on the seemingly empty square, the game plays the sound of an explosion and that piece is removed from play. As in classic Stratego, only a Miner can remove a Bomb from play. A player who successfully captures the opposing Flag is rewarded with a triumphant bit of music from the 1812 Overture. In the late 1990s, the Jumbo Company released several European variants, including a three- and four-player version, and a new Cannon piece (which jumps two squares to capture any piece, but loses to any attack against it). It also included some alternate rules such as Barrage (a quicker two-player game with fewer pieces) and Reserves (reinforcements in the three- and four-player games). The four-player version appeared in America in 1997. Starting in the 2000s, Hasbro, under its Milton Bradley label,