Editing Removable obstacle

A '''removable obstacle''' includes any [[wall]] or [[acting wall]] which can be removed from its current square, temporarily or permanently.

Most removable obstacles are Chip-removable only; the Chip-removable obstacles are the [[computer chip]], [[socket]], [[lock]], [[boot]], [[dirt]] and [[blue wall]].

== Monster and block-removable obstacles ==

Additionally, a [[bomb]] may be removed by a [[monster]] or [[block]], and [[water]] may be removed by a block.

== Remote-removable obstacles ==

The [[toggle wall]] can also qualify under this definition, as touching a [[green button]] will remove the wall, but only temporarily until another button is hit. This is the only true "wall" which can be removed from the game; a removable blue wall is half [[acting dirt]] and half acting wall.

== A ''movable'' obstacle ==

A block counts as a removable obstacle, since it can be moved from its square and is a monster-acting wall, and also is used in many actual play situations as an obstacle to other blocks sliding.

== What they do in play ==

Most often, removable obstacles play a part in blocks sliding in chains, such as [[Madness II]]. When a sliding object runs into a removable acting wall, its reaction and the range of options afterwards depend on the medium of sliding. It cannot slide through a [[teleport]], as the teleport would have been skipped; if an [[ice]] stretch is used, it will continue the other direction. The most important (often the only important) situation is when a [[force floor]] stretch leads to a removable acting wall.

If a monster was sliding, it will become trapped for good on this space unless the obstacle is a toggle wall, since any attempt to remove the obstacle will cause Chip to be killed. A block will therefore become unusable. When a block slides to a stop, it is still on the [[sliplist]] and will destroy Chip if he removes the obstacle, again unless a toggle wall was in front of the block. To allow the obstacle to be removed safely, a [[ram]] would be necessary. This will be officially learned in [[After the Rainstorm]].

[[Category:Terminology]]
[[Category:Tile groups]]