back to lkozma.net | WikipediaVision is an (almost) real-time visualization of Wikipedia edits and what part of the world they come from. | | FishEyeTabs is a tiny extension for Mozilla Firefox that replaces tab-bar scrolling with fisheye-style zooming when many tabs are open. |
| Color-changing links are a simple way of keeping bookmarks online, with a visualization of link popularity (description). | | A simple paper/pencil game. And another one. An attempt of analyzing the first with combinatorial game theory. |
| Reverse autocomplete is a tweak on the familiar user interface feature. | | Metahint, a "suggestive" site search engine I developed with Szilárd Pataki. |
| BookBox is an embeddable widget that you can use to show your favorite books on your webpage. | | Nebuló. A site for Romanians interested in learning Hungarian. Curs online gratuit de limba maghiara. |
| phpBB recent posts widget, a small add-on to the popular forum engine. | | Sounds-a-bit-like is a collection of similar songs added by the users (formerly at soundsabitlike.com) |
| Smooth colour clock, a tiny tweak on an existing colour clock implementation. Directly to my version. | | Old, unfinished projects. These are some small programs I wrote as school assignments or just for fun in the past 10-15 years. |
| Inequalities cheat sheet, a collection of some of the most useful inequalities. | | Bongard problems, and my attempt to create a few of them. |
| Random wiki image wallpaper, a script for Linux/Unix systems that sets a random image from Wikipedia as wallpaper. | | A collection of mixed metaphors similar to "the knee is the Achilles' heel of the leg". |
| Self-counting sentences, a family of mind-bending recursive math puzzles: first part, second part. |
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Color-changing linksBrowser bookmarks are difficult to synchronize if you use more than one computer, possibly running different OS's and browsers. The only way to have your links accessible all the time is to keep them online. For me, social bookmarking sites were an overkill, as I only need a simple page listing all the links, with a basic interface to add/remove items. I can set this site to be my startup page in all browsers. A wiki would do, but while I'm at it, why not add some visual extravaganza. The red color of the links shows how often they are clicked, compared to other links in the same group. This way the important ones are more easily found, and the ones never used can be spotted if needed. Additionally, the color of a link decays with time, so links that haven't been clicked for a long time slowly change back to black. The green component shows how long ago the link was added. In the spirit of eating one's own dogfood, my bookmarks are organized this way. If you want to create a similar page of your own, I'll host it for free. The interface for editing your page might seem strange at first, but it's easy to use. You can enter scripts to execute more commands at once. If your pass-code is foo, you can add a category and a link to it, with the following script: pcfoo acMyCategory alMyLink[http://mylink.com]MyCategory
Paper/pencil gameOne of these days, I came up with the idea for the following game:
Since the gameplay is completely deterministic, one of the players must have a winning strategy for each board size. For example, the first player wins on a 3*3 board, but loses on 2*4. For smaller boards it's trivial to figure out who wins, but on a large board this can lead to a lot of computation. As a puzzle, you can find who wins on 4*4, 4*5, 4*6, 5*6, and 6*6. I haven't seen the game in this exact form, but doing some research, I found several existing games that are very similar to it. The 1*n version is known as Dawson's chess, it can be played online here, and a game called Regio already exists, which is almost the same, the only difference being that in Regio only the 4 direct neighbors are considered, instead of 8. More information about the game... Knight's tour gameThis two-player game is played on a checkered board of arbitrary size (larger than 3*3). The first player chooses a starting position, where he places a knight. The second player makes a move, according to the regular chess-rule of knight movement. Then first player makes a move, then the second again and so on (the moves are made with the same knight). Every field on which the knight has jumped (including the starting position) are marked, and it cannot jump on a marked position again. The player who cannot move loses.
(0 is the starting position, the numbers show the order of moves in an example game) To my knowledge, this game hasn't been described before, if you know otherwise, I'd be glad to hear about it. It is interesting to find out which player has a winning strategy for each board size. On a 4*4 board for example, the second player can always win. In the general case I am not aware of any simple solution. This game is related to the Knight's Tour problem on a chessboard. Web projectsA (growing) list of no-frills websites that I made or helped create:- www.fordito.ro - Hiteles fordítás román, magyar, német nyelven. Székelyudvarhely. Traducator autorizat in limba romana, maghiara, germana. Odorheiu Secuiesc. - www.városfalva.ro - Városfalva falu honlapja. Pagina satului Oraseni. Transylvanian village homepage. If you would like to support my projects, buy something for yourself from Amazon.com (if you follow this link and subsequently make a purchase, I will get a tiny percentage from Amazon and there is no extra cost for you). On the front page you can see some books I found interesting recently. |