From cube-lovers-errors@mc.lcs.mit.edu Fri Mar 12 15:58:21 1999 Return-Path: Received: from sun28.aic.nrl.navy.mil (sun28.aic.nrl.navy.mil [132.250.84.38]) by mc.lcs.mit.edu (8.9.1a/8.9.1-mod) with SMTP id PAA18643 for ; Fri, 12 Mar 1999 15:58:20 -0500 (EST) Precedence: bulk Errors-To: cube-lovers-errors@mc.lcs.mit.edu Message-Id: <36E7D3A7.1796@ameritech.net> Date: Thu, 11 Mar 1999 08:31:03 -0600 From: Hana Bizek Reply-To: hbizek@ameritech.net To: cube-lovers@ai.mit.edu Subject: color Hello, cube-lovers, May I address an issue of cube colors, brought here by Dr. Singmaster? Color problem is crucial to those of us who engage in creating multi-cube designs, particularly if those designs are 3-dimensional. In such designs it is possible to suppress colors and create designs of, e.g., three colors only on its faces. No, I have not gone insane, I know what I am talking about. It is most unpleasant for a designer to have stickers falling off his or her cubes! The cubes should be well-made and their colors distinct. I find the orange and red colors to be nearly identical in hue. The red is light and the orange is dark, which is bad. I try to solve the problemn by suppressing orange in my 3-, 4- and 5-color designs, but it is irritating. Why can't the cube makers replace red-orange colors by pink-dark red for better contrast? Another issue is parity pairs. In solution algoirithms you don't kave to know them, but they are crucial in 3-dimensional-design algorithms. They make the above-mentioned color suppression possible. Now why can't the manufacturers sell such pairs? If they don't know what parity pairs are, I will tell them. Hana Bizek physicist, and 3-d Rubik's cube designer [Moderator's note: By parity pairs, I rather suspect he means mirror-image pairs.]