Ubuntu Feisty 7.04 manual page repository
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Provided by: sgt-puzzles_6879-1_i386
solo - puzzle game based on Sudoku
solo [--generate n] [--print wxh [--with-solutions] [--scale n] [--colour]] [game-parameters|game-ID|random-seed] solo --version
You have a square grid, which is divided into square or rectangular blocks. Each square must be filled in with a digit from 1 to the size of the grid, in such a way that o every row contains only one occurrence of each digit o every column contains only one occurrence of each digit o every block contains only one occurrence of each digit. You are given some of the numbers as clues; your aim is to place the rest of the numbers correctly. The default puzzle size is 3x3 (a 9x9 actual grid, divided into nine 3x3 blocks). You can also select sizes with rectangular blocks instead of square ones, such as 2x3 (a 6x6 grid divided into six 3x2 blocks). If you select a puzzle size which requires more than 9 digits, the additional digits will be letters of the alphabet. For example, if you select 3x4 then the digits which go in your grid will be 1 to 9, plus "a", "b" and "c". I first saw this puzzle in Nikoli (http://www.nikoli.co.jp/puz zles/1/index_text-e.htm), although it’s also been popularised by vari‐ ous newspapers under the name "Sudoku" or "Su Doku". Howard Garns is considered the inventor of the modern form of the puzzle, and it was first published in Dell Pencil Puzzles and Word Games. A more elaborate treatment of the history of the puzzle can be found on Wikipedia (http://en.wikipedia.org/wiki/Sudoku). To play Solo, simply click the mouse in any empty square and then type a digit or letter on the keyboard to fill that square. If you make a mistake, click the mouse in the incorrect square and press Space to clear it again (or use the Undo feature). If you right-click in a square and then type a number, that number will be entered in the square as a "pencil mark". You can have pencil marks for multiple numbers in the same square. The game pays no attention to pencil marks, so exactly what you use them for is up to you: you can use them as reminders that a particular square needs to be re-examined once you know more about a particular number, or you can use them as lists of the possible numbers in a given square, or anything else you feel like. To erase a single pencil mark, right-click in the square and type the same number again. All pencil marks in a square are erased when you left-click and type a number, or when you left-click and press space. Right-clicking and pressing space will also erase pencil marks. (All the actions described below are also available.) Solo allows you to configure two separate dimensions of the puzzle grid on the "Type" menu: the number of columns, and the number of rows, into which the main grid is divided. (The size of a block is the inverse of this: for example, if you select 2 columns and 3 rows, each actual block will have 3 columns and 2 rows.) You can also configure the type of symmetry shown in the generated puz‐ zles. More symmetry makes the puzzles look prettier but may also make them easier, since the symmetry constraints can force more clues than necessary to be present. Completely asymmetric puzzles have the freedom to contain as few clues as possible. Finally, you can configure the difficulty of the generated puzzles. Difficulty levels are judged by the complexity of the techniques of deduction required to solve the puzzle: each level requires a mode of reasoning which was not necessary in the previous one. In particular, on difficulty levels "Trivial" and "Basic" there will be a square you can fill in with a single number at all times, whereas at "Intermedi‐ ate" level and beyond you will have to make partial deductions about the set of squares a number could be in (or the set of numbers that could be in a square). At "Unreasonable" level, even this is not enough, and you will eventually have to make a guess, and then back‐ track if it turns out to be wrong. Generating difficult puzzles is itself difficult: if you select one of the higher difficulty levels, Solo may have to make many attempts at generating a puzzle before it finds one hard enough for you. Be pre‐ pared to wait, especially if you have also configured a large puzzle size. These actions are all available from the "Game" menu and via keyboard shortcuts, in addition to any game-specific actions. (On Mac OS X, to conform with local user interface standards, these actions are situated on the "File" and "Edit" menus instead.) New game ("N", Ctrl+"N") Starts a new game, with a random initial state. Restart game Resets the current game to its initial state. (This can be undone.) Load Loads a saved game from a file on disk. Save Saves the current state of your game to a file on disk. The Load and Save operations should preserve your entire game history (so you can save, reload, and still Undo and Redo things you had done before saving). Print Where supported (currently only on Windows), brings up a dialog allowing you to print an arbitrary number of puzzles randomly generated from the current parameters, optionally including the current puzzle. (Only for puzzles which make sense to print, of course - it’s hard to think of a sensible printable representa‐ tion of Fifteen!) Undo ("U", Ctrl+"Z", Ctrl+"_") Undoes a single move. (You can undo moves back to the start of the session.) Redo ("R", Ctrl+"R") Redoes a previously undone move. Copy Copies the current state of your game to the clipboard in text format, so that you can paste it into (say) an e-mail client or a web message board if you’re discussing the game with someone else. (Not all games support this feature.) Solve Transforms the puzzle instantly into its solved state. For some games (Cube) this feature is not supported at all because it is of no particular use. For other games (such as Pattern), the solved state can be used to give you information, if you can’t see how a solution can exist at all or you want to know where you made a mistake. For still other games (such as Sixteen), automatic solution tells you nothing about how to get to the solution, but it does provide a useful way to get there quickly so that you can experiment with set-piece moves and transforma‐ tions. Some games (such as Solo) are capable of solving a game ID you have typed in from elsewhere. Other games (such as Rectangles) cannot solve a game ID they didn’t invent themself, but when they did invent the game ID they know what the solution is already. Still other games (Pattern) can solve some external game IDs, but only if they aren’t too difficult. The "Solve" command adds the solved state to the end of the undo chain for the puzzle. In other words, if you want to go back to solving it yourself after seeing the answer, you can just press Undo. Quit ("Q", Ctrl+"Q") Closes the application entirely. There are two ways to save a game specification out of a puzzle and recreate it later, or recreate it in somebody else’s copy of the same puzzle. The "Specific" and "Random Seed" options from the "Game" menu (or the "File" menu, on Mac OS X) each show a piece of text (a "game ID") which is sufficient to reconstruct precisely the same game at a later date. You can enter either of these pieces of text back into the program (via the same "Specific" or "Random Seed" menu options) at a later point, and it will recreate the same game. You can also use either one as a command line argument (on Windows or Unix); see below for more detail. The difference between the two forms is that a descriptive game ID is a literal description of the initial state of the game, whereas a random seed is just a piece of arbitrary text which was provided as input to the random number generator used to create the puzzle. This means that: o Descriptive game IDs tend to be longer in many puzzles (although (cube(6)), only need very short descrip‐ tions). So a random seed is often a quicker way to note down the puzzle you’re currently playing, or to tell it to somebody else so they can play the same one as you. o Any text at all is a valid random seed. The automatically gener‐ ated ones are fifteen-digit numbers, but anything will do; you can type in your full name, or a word you just made up, and a valid puzzle will be generated from it. This provides a way for two or more people to race to complete the same puzzle: you think of a random seed, then everybody types it in at the same time, and nobody has an advantage due to having seen the gener‐ ated puzzle before anybody else. o It is often possible to convert puzzles from other sources (such as "nonograms" or "sudoku" from newspapers) into descriptive game IDs suitable for use with these programs. o Random seeds are not guaranteed to produce the same result if you use them with a different version of the puzzle program. This is because the generation algorithm might have been improved or modified in later versions of the code, and will therefore produce a different result when given the same sequence of random numbers. Use a descriptive game ID if you aren’t sure that it will be used on the same version of the pro‐ gram as yours. (Use the "About" menu option to find out the version number of the program. Programs with the same version number running on different platforms should still be random-seed compatible.) A descriptive game ID starts with a piece of text which encodes the parameters of the current game (such as grid size). Then there is a colon, and after that is the description of the game’s initial state. A random seed starts with a similar string of parameters, but then it contains a hash sign followed by arbitrary data. If you enter a descriptive game ID, the program will not be able to show you the random seed which generated it, since it wasn’t generated from a random seed. If you enter a random seed, however, the program will be able to show you the descriptive game ID derived from that ran‐ dom seed. Note that the game parameter strings are not always identical between the two forms. For some games, there will be parameter data provided with the random seed which is not included in the descriptive game ID. This is because that parameter information is only relevant when gener‐ ating puzzle grids, and is not important when playing them. Thus, for example, the difficulty level in Solo (above) is not mentioned in the descriptive game ID. These additional parameters are also not set permanently if you type in a game ID. For example, suppose you have Solo set to "Advanced" diffi‐ culty level, and then a friend wants your help with a "Trivial" puzzle; so the friend reads out a random seed specifying "Trivial" difficulty, and you type it in. The program will generate you the same "Trivial" grid which your friend was having trouble with, but once you have fin‐ ished playing it, when you ask for a new game it will automatically go back to the "Advanced" difficulty which it was previously set on. The "Type" menu, if present, may contain a list of preset game set‐ tings. Selecting one of these will start a new random game with the parameters specified. The "Type" menu may also contain a "Custom" option which allows you to fine-tune game parameters. The parameters available are specific to each game and are described in the following sections. (This section does not apply to the Mac OS X version.) The games in this collection deliberately do not ever save information on to the computer they run on: they have no high score tables and no saved preferences. (This is because I expect at least some people to play them at work, and those people will probably appreciate leaving as little evidence as possible!) However, if you do want to arrange for one of these games to default to a particular set of parameters, you can specify them on the command line. The easiest way to do this is to set up the parameters you want using the "Type" menu (see above), and then to select "Random Seed" from the "Game" or "File" menu (see above). The text in the "Game ID" box will be composed of two parts, separated by a hash. The first of these parts represents the game parameters (the size of the playing area, for exam‐ ple, and anything else you set using the "Type" menu). If you run the game with just that parameter text on the command line, it will start up with the settings you specified. cube(6)), select "Octahedron" from the "Type" menu, and then go to the game ID selection, you will see a string of the form "o2x2#338686542711620". Take only the part before the hash ("o2x2"), and start Cube with that text on the command line: "cube o2x2". If you copy the entire game ID on to the command line, the game will start up in the specific game that was described. This is occasionally a more convenient way to start a particular game ID than by pasting it into the game ID selection box. (You could also retrieve the encoded game parameters using the "Spe‐ cific" menu option instead of "Random Seed", but if you do then some options, such as the difficulty level in Solo, will be missing. See above for more details on this.) (This section only applies to the Unix port.) In addition to specifying game parameters on the command line (see above), you can also specify various options: --generate n If this option is specified, instead of a puzzle being dis‐ played, a number of descriptive game IDs will be invented and printed on standard output. This is useful for gaining access to the game generation algorithms without necessarily using the frontend. If game parameters are specified on the command-line, they will be used to generate the game IDs; otherwise a default set of parameters will be used. The most common use of this option is in conjunction with --print, in which case its behaviour is slightly different; see below. --print wxh If this option is specified, instead of a puzzle being dis‐ played, a printed representation of one or more unsolved puzzles is sent to standard output, in PostScript format. On each page of puzzles, there will be w across and h down. If there are more puzzles than wxh, more than one page will be printed. If --generate has also been specified, the invented game IDs will be used to generate the printed output. Otherwise, a list of game IDs is expected on standard input (which can be descrip‐ tive or random seeds; see above), in the same format produced by --generate. For example: net --generate 12 --print 2x3 7x7w | lpr will generate two pages of printed Net puzzles (each of which will have a 7x7 wrapping grid), and pipe the output to the lpr command, which on many systems will send them to an actual printer. There are various other options which affect printing; see below. --version Prints version information about the game, and then quits. The following options are only meaningful if --print is also specified: --with-solutions The set of pages filled with unsolved puzzles will be followed by the solutions to those puzzles. --scale n Adjusts how big each puzzle is when printed. Larger numbers make puzzles bigger; the default is 1.0. --colour Puzzles will be printed in colour, rather than in black and white (if supported by the puzzle). Full documentation in /usr/share/doc/sgt-puzzles/puzzles.txt.gz.