The Wumpus-World Environment

This page describes the Wumpus-World in detail. Here you will find everything about the possible Percepts and Actions and they ways an agent can die in this Environment.

To be able to measure an agent's ability to fulfill this goal the following scheme for awarding a score to the agent is used:

• The agent starts its quest for gold with a score of zero points.

• For every action an agent takes its score is decreased by one point.

• For every piece of gold an agent finds its score is increased by thousand points.

• If an agent dies its final score is minus ten thousand points.

• If an agent leaves the cave its final score is the amount of points he had when leaving the cave.

• Movement to neighbouring fields exactly above, below ,left, or right of the agent

  • "UP"

  • "DOWN"

  • "LEFT"

  • "RIGHT"

  These moves are only possible if no Wall is blocking the way. In case of such a blocked move a "BUMP"-Percept will be generated, but the agent will not move.

• Shooting a javelin/arrow in one of the four wind-directions:

  • "SHOOT_UP"

  • "SHOOT_DOWN"

  • "SHOOT_LEFT"

  • "SHOOT_RIGHT"

  These actions will result in a the throw of a javelin or arrow ( if the agent still has some left when it attempts to shoot ) that kills the Wumpus if its position is in the wind direction of the javelin. If the Wumpus is not hit the javelin will break at the first wall it hits and break into pieces.

• Getting the gold:

  • "GRAB"

  This action is only successful if there is at least one piece of gold in the current field. In this case the agent will pick up one piece.

• Leaving the cave through:

  • "CLIMB"

  This move is only sucessful in the starting/exit field (the one marked by the green exit-sign ). Wheter the "CLIMB" was or was not sucessful the agent will only know by that fact that it is still in the Wumpus-World or not.

• "GOLD"-Percept: (cumulative)
  There is at least one piece of gold in the current field...

• "STENCH"-Percept: (cumulative)
  There is a wumpus near the current field (up, down, left or right).

• "BREEZE"-Percept: (cumulative)
  There is a pit near the current field (up, down, left or right).

• "BUMP"-Percept: (cumulative)
  The agent ran into a wall with it's last move.

• "SCREAM"-Percept: (cumulative)
  Someone - if not the agent himself - killed the Wumpus with a javelin.

• "EMPTY"-Percept: (non-cumulative)
  This Percept is generated in the absence of all the above Percepts. In this case the agent may move randomly without risking it's life.

• Go to the Wumpus main page

last modified: Sa. June 06 14:34:54 1997 by Christian Schwaiger

email to: webmaster@mahler.kr.tuwien.ac.at