Ricochet Robot

Frenzied robot is the name of a board game by Alex Randolph.

The game was released in Germany in 1999 when Hans im Glück. As of 2004, two new editions by Abacus games appeared. The English edition was published by Rio Grande Games in 1999 as Ricochet Robot and 2004 as Ricochet Robots. The game is designed for players aged 10 and takes about 45 minutes.


The Schedule consists of four two-sided neighborhoods, so there are 96 different possible combinations. Move 4 figures ( robots) On this plan. Furthermore, there are 17 chips and an hourglass.

Game play

Raging Robots is a puzzle game for two or more participants. The four different colored robots are distributed randomly on the game board. Then one of the 17 chips is inverted. With the exception of a colorful chips can be seen on each chip a symbol and a color background, this corresponds exactly to a field on the Schedule. Now each player must find a way to get the same color robot with as few moves in exactly that field. Each of the four colored robot has to be moved during the game at four different fields. There is also a colorful array to an arbitrary robot must be moved. The robots move only horizontally or vertically on the board and remain standing only when they meet with an obstacle, either a wall on the board or one of the other robot. The three differently colored robot can be moved in order to then use as an obstacle. Has a player found a way, he calls the number of trains that he needs to and turns the hourglass over. Until the end of the hourglass, all players have the opportunity to name the number of trains their solution. As soon as the hourglass runs out, shows the player who has been called the smallest number that its solution. Does he bring the robot to the specified number of moves to the target field, so he gets the chip. Otherwise, get the player who has been called the second smallest number, his chance, etc. An additional variation is to record a fifth, black robot with in the game. This can only be used as an obstacle to the other robots or to be drawn to the colorful box.


Are all 17 chips distributed, that is, solved all 17 problems, the player has won the most chips.

Complexity Theoretical considerations

As in 2005, it has been shown, the question is whether, for a given field, a given robot number and a given starting configuration, an approach for any robot exists, NP-hard (see links).


The first edition was published in 1999 under the name Raging Robots at Hans im Glück. This edition is no longer available and very popular with collectors as before. An English and identical version was published the same year by Rio Grande Games as Ricochet Robot.

The second edition was published in 2004 by Rio Grande Games under the name Ricochet Robots and distributed in Germany by Abacus games. This version includes a fifth robot (black) and has additional elements on the game board. This edition is now no longer manufactured and is only rarely available. It is recognizable by the blue box.

In 2008, Rio Grande Games, also published under the name Ricochet Robots, the third edition, the game plan is identical to the original version again. This edition will continue to be distributed in Germany by Abacus games and can be recognized by the wine-red box and a corresponding print in the lower left corner. It contains an extra silver robot that can be used for different game variations.