claimed by David Lilja, who was known as Davie M. Karlsson when he wrote the midi file. Variants In addition to the rules implemented by the standard TetriNET 1.13 client, there are a number of variants available. TetriFast TetriFast removes the one second delay between pieces found in the standard TetriNET gameplay. As the piece delay is implemented client side, a trivial modification was made to the network protocol to prevent TetriFast clients connecting to standard TetriNET games. TetriNET/TetriFast 1.14 The 1.14 protocol is another variant, where every player will receive the same sequence of pieces. Blocktrix Blocktrix is an alternative TetriNET client for Windows. In addition to supporting traditional TetriNET and TetriFast protocols, it has a newer Blocktrix mode that includes a number of additional special block types: l : Left Gravity - Pulls all blocks as far left as possible, leaving any horizontal gaps at the right edge of the field. p : Piece Change - Changes the current piece. z : Zebra Field - Clears every second column of the field. TetriNET2 TetriNET2 is a multiplayer Tetris game by the original creator of TetriNET. In addition to the special blocks found in the original TetriNET, it has five new ones: Immunity - Target cannot be affected by any special for a default of 15 seconds. Clear Column - Deletes a random column from the target field. Mutate Pieces - A certain number of the target's next pieces (default 3) become large and awkwardly shaped. Darkness - Target cannot see anything on his field besides the current piece and its immediate surroundings for a default of 10 seconds. Confusion - Causes target's controls to "mix up" for a default of 10 seconds (for example, the key that normally moves the piece left may start moving the piece right instead.) In late 2007, like other clones, TetriNET2 was shut down per the request of The Tetris Company. The TetriNET2 website and servers became unavailable for several years. As of early 2010, TetriNET2 is back up and running (per request of many fans that are not satisfied with the lack of game development by The Tetris Company). The TetriNET2 website and servers have been recovered, relocated, and restored. Popularity and reception With clients for various platforms available, the game was also well received in the Linux community. The Linux conference linux.conf.au even included a programming contest where contestants tried to