ZenDraL.NET » Games

Rubik’s Cube – PLL Exercises

ZenDraL — Mon, 14 Jun 2010 06:16:17 +0000

I’ve been working on my 1-Look PLL lately and find myself wanting to cycle through the PLL cases to practice. I decided to make a tiny web app to show the different cases while hiding the algorithms (with an option to reveal them if necessary).

You can move to the next exercise by hitting space.
If you go to a previous exercise that will change direction and pressing space will go backwards until you press next at which point the direction will change again.
There is a navigation menu below the buttons which will allow you to quickly select a case to switch to.
Due to popular demand there is now an option to always show the algorithm.
There are buttons to switch between images and names for the navigation menu.
Due to popular demand there is now an option to always show the algorithm.

L4D2: Automatically loading user defined scripts.

ZenDraL — Wed, 05 May 2010 01:51:48 +0000

Similar to Counter-Strike, Left 4 Dead 2 allows you to write scripts which modify the game’s behaviour.

Unfortunately, there is no default file to include your modifications in; however, there is a launch option you can use to run a script when the game is loaded.

Add the following to your launch options [cci_cstrike]+exec scriptname.cfg[/cci_cstrike] to execute a script which should be placed in your [cci_cstrike]cfg[/cci_cstrike] folder.

As a side note, you may want to add [cci_cstrike]-novid[/cci_cstrike] to skip the movie when the game loads.

Algorithms for Rotating the Centers in a Rubenking

ZenDraL — Sun, 07 Feb 2010 19:56:38 +0000

I recently made myself a Rubenking cube with stickers from CubeSmith and after solving most of the cube I got stuck with centers that were not aligned properly. Below are the algorithms I found for aligning the centers and completing my solution.

Note that these algorithms will work for picture cubes.

Case 1: Two centers with 90 degree rotations, hold on the piece that requires a clockwise rotation on the left and the piece that requires a counter-clockwise rotation on the up face and perform the following algorithm:
MR’ MU’ MR U MR’ MU MR U’
Case 2: One center requires 180 degree rotation, hold on top face and perform the following algorithm:
(U R L U2 R’ L’)2

Rubik’s Cube – 3x3x3 Algorithm Inverter

ZenDraL — Tue, 02 Feb 2010 03:49:43 +0000

When trying to work on an OLL or PLL algorithm it is often useful to have the inverse of the algorithm so that you can easily setup the situation you want to try. Use the algorithm inverter below to obtain an inverted algorithm.

This inverter uses Superset notation which you can find defined in detail here!

There is support for the following symbols: R U F L D B TR TU TF TL TD TB CR CU CF CL CD CB MR MU MF ML MD MB

There IS suppport for inverting any of the symbols above one at a time.
Valid inversion R’ U’ F’
Invalid inversion (R U F)’

ALL moves must be seperated by a space. Valid inputR’ U’ F’ Invalid input R’U'F’

This inverter is very basic there is no support for inversion of groups (i.e., (F R U)’), commutators (i.e., [a,b]), repitition, or any other advanced Superset constructs.

Enter the algorithm to invert in the text box below and hit the ‘Invert Algorithm’ button.