1NOTE: Chess.app consists of two components: The Chess engine, "sjeng", and 2 the graphical frontend. 3 4"sjeng", contained in the "sjeng" subdirectory, is distributed under the 5terms of the GNU General Public License listed below. 6 7The graphical frontend, i.e., all files not in the "sjeng" 8subdirectory (including files derived from glChess which Apple has 9permission to relicense under the following terms), are distributed 10under the terms of the Apple Sample Code License: 11 12 IMPORTANT: This Apple software is supplied to you by Apple Inc. 13 ("Apple") in consideration of your agreement to the following 14 terms, and your use, installation, modification or redistribution of 15 this Apple software constitutes acceptance of these terms. 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To prevent this, we have made it clear that any 106patent must be licensed for everyone's free use or not licensed at all. 107 108 The precise terms and conditions for copying, distribution and 109modification follow. 110 111 GNU GENERAL PUBLIC LICENSE 112 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 113 114 0. This License applies to any program or other work which contains 115a notice placed by the copyright holder saying it may be distributed 116under the terms of this General Public License. The "Program", below, 117refers to any such program or work, and a "work based on the Program" 118means either the Program or any derivative work under copyright law: 119that is to say, a work containing the Program or a portion of it, 120either verbatim or with modifications and/or translated into another 121language. (Hereinafter, translation is included without limitation in 122the term "modification".) Each licensee is addressed as "you". 123 124Activities other than copying, distribution and modification are not 125covered by this License; they are outside its scope. The act of 126running the Program is not restricted, and the output from the Program 127is covered only if its contents constitute a work based on the 128Program (independent of having been made by running the Program). 129Whether that is true depends on what the Program does. 130 131 1. You may copy and distribute verbatim copies of the Program's 132source code as you receive it, in any medium, provided that you 133conspicuously and appropriately publish on each copy an appropriate 134copyright notice and disclaimer of warranty; keep intact all the 135notices that refer to this License and to the absence of any warranty; 136and give any other recipients of the Program a copy of this License 137along with the Program. 138 139You may charge a fee for the physical act of transferring a copy, and 140you may at your option offer warranty protection in exchange for a fee. 141 142 2. You may modify your copy or copies of the Program or any portion 143of it, thus forming a work based on the Program, and copy and 144distribute such modifications or work under the terms of Section 1 145above, provided that you also meet all of these conditions: 146 147 a) You must cause the modified files to carry prominent notices 148 stating that you changed the files and the date of any change. 149 150 b) You must cause any work that you distribute or publish, that in 151 whole or in part contains or is derived from the Program or any 152 part thereof, to be licensed as a whole at no charge to all third 153 parties under the terms of this License. 154 155 c) If the modified program normally reads commands interactively 156 when run, you must cause it, when started running for such 157 interactive use in the most ordinary way, to print or display an 158 announcement including an appropriate copyright notice and a 159 notice that there is no warranty (or else, saying that you provide 160 a warranty) and that users may redistribute the program under 161 these conditions, and telling the user how to view a copy of this 162 License. (Exception: if the Program itself is interactive but 163 does not normally print such an announcement, your work based on 164 the Program is not required to print an announcement.) 165 166These requirements apply to the modified work as a whole. If 167identifiable sections of that work are not derived from the Program, 168and can be reasonably considered independent and separate works in 169themselves, then this License, and its terms, do not apply to those 170sections when you distribute them as separate works. But when you 171distribute the same sections as part of a whole which is a work based 172on the Program, the distribution of the whole must be on the terms of 173this License, whose permissions for other licensees extend to the 174entire whole, and thus to each and every part regardless of who wrote it. 175 176Thus, it is not the intent of this section to claim rights or contest 177your rights to work written entirely by you; rather, the intent is to 178exercise the right to control the distribution of derivative or 179collective works based on the Program. 180 181In addition, mere aggregation of another work not based on the Program 182with the Program (or with a work based on the Program) on a volume of 183a storage or distribution medium does not bring the other work under 184the scope of this License. 185 186 3. You may copy and distribute the Program (or a work based on it, 187under Section 2) in object code or executable form under the terms of 188Sections 1 and 2 above provided that you also do one of the following: 189 190 a) Accompany it with the complete corresponding machine-readable 191 source code, which must be distributed under the terms of Sections 192 1 and 2 above on a medium customarily used for software interchange; or, 193 194 b) Accompany it with a written offer, valid for at least three 195 years, to give any third party, for a charge no more than your 196 cost of physically performing source distribution, a complete 197 machine-readable copy of the corresponding source code, to be 198 distributed under the terms of Sections 1 and 2 above on a medium 199 customarily used for software interchange; or, 200 201 c) Accompany it with the information you received as to the offer 202 to distribute corresponding source code. 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Any attempt 226otherwise to copy, modify, sublicense or distribute the Program is 227void, and will automatically terminate your rights under this License. 228However, parties who have received copies, or rights, from you under 229this License will not have their licenses terminated so long as such 230parties remain in full compliance. 231 232 5. You are not required to accept this License, since you have not 233signed it. However, nothing else grants you permission to modify or 234distribute the Program or its derivative works. These actions are 235prohibited by law if you do not accept this License. Therefore, by 236modifying or distributing the Program (or any work based on the 237Program), you indicate your acceptance of this License to do so, and 238all its terms and conditions for copying, distributing or modifying 239the Program or works based on it. 240 241 6. Each time you redistribute the Program (or any work based on the 242Program), the recipient automatically receives a license from the 243original licensor to copy, distribute or modify the Program subject to 244these terms and conditions. You may not impose any further 245restrictions on the recipients' exercise of the rights granted herein. 246You are not responsible for enforcing compliance by third parties to 247this License. 248 249 7. If, as a consequence of a court judgment or allegation of patent 250infringement or for any other reason (not limited to patent issues), 251conditions are imposed on you (whether by court order, agreement or 252otherwise) that contradict the conditions of this License, they do not 253excuse you from the conditions of this License. If you cannot 254distribute so as to satisfy simultaneously your obligations under this 255License and any other pertinent obligations, then as a consequence you 256may not distribute the Program at all. For example, if a patent 257license would not permit royalty-free redistribution of the Program by 258all those who receive copies directly or indirectly through you, then 259the only way you could satisfy both it and this License would be to 260refrain entirely from distribution of the Program. 261 262If any portion of this section is held invalid or unenforceable under 263any particular circumstance, the balance of the section is intended to 264apply and the section as a whole is intended to apply in other 265circumstances. 266 267It is not the purpose of this section to induce you to infringe any 268patents or other property right claims or to contest validity of any 269such claims; this section has the sole purpose of protecting the 270integrity of the free software distribution system, which is 271implemented by public license practices. Many people have made 272generous contributions to the wide range of software distributed 273through that system in reliance on consistent application of that 274system; it is up to the author/donor to decide if he or she is willing 275to distribute software through any other system and a licensee cannot 276impose that choice. 277 278This section is intended to make thoroughly clear what is believed to 279be a consequence of the rest of this License. 280 281 8. If the distribution and/or use of the Program is restricted in 282certain countries either by patents or by copyrighted interfaces, the 283original copyright holder who places the Program under this License 284may add an explicit geographical distribution limitation excluding 285those countries, so that distribution is permitted only in or among 286countries not thus excluded. In such case, this License incorporates 287the limitation as if written in the body of this License. 288 289 9. The Free Software Foundation may publish revised and/or new versions 290of the General Public License from time to time. Such new versions will 291be similar in spirit to the present version, but may differ in detail to 292address new problems or concerns. 293 294Each version is given a distinguishing version number. If the Program 295specifies a version number of this License which applies to it and "any 296later version", you have the option of following the terms and conditions 297either of that version or of any later version published by the Free 298Software Foundation. If the Program does not specify a version number of 299this License, you may choose any version ever published by the Free Software 300Foundation. 301 302 10. If you wish to incorporate parts of the Program into other free 303programs whose distribution conditions are different, write to the author 304to ask for permission. For software which is copyrighted by the Free 305Software Foundation, write to the Free Software Foundation; we sometimes 306make exceptions for this. Our decision will be guided by the two goals 307of preserving the free status of all derivatives of our free software and 308of promoting the sharing and reuse of software generally. 309 310 NO WARRANTY 311 312 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 313FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 314OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 315PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 316OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 317MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 318TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 319PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 320REPAIR OR CORRECTION. 321 322 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 323WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 324REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 325INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 326OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 327TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 328YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 329PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 330POSSIBILITY OF SUCH DAMAGES. 331 332 END OF TERMS AND CONDITIONS 333 334 How to Apply These Terms to Your New Programs 335 336 If you develop a new program, and you want it to be of the greatest 337possible use to the public, the best way to achieve this is to make it 338free software which everyone can redistribute and change under these terms. 339 340 To do so, attach the following notices to the program. It is safest 341to attach them to the start of each source file to most effectively 342convey the exclusion of warranty; and each file should have at least 343the "copyright" line and a pointer to where the full notice is found. 344 345 <one line to give the program's name and a brief idea of what it does.> 346 Copyright (C) 19yy <name of author> 347 348 This program is free software; you can redistribute it and/or modify 349 it under the terms of the GNU General Public License as published by 350 the Free Software Foundation; either version 2 of the License, or 351 (at your option) any later version. 352 353 This program is distributed in the hope that it will be useful, 354 but WITHOUT ANY WARRANTY; without even the implied warranty of 355 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 356 GNU General Public License for more details. 357 358 You should have received a copy of the GNU General Public License 359 along with this program; if not, write to the Free Software 360 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 361 362 363Also add information on how to contact you by electronic and paper mail. 364 365If the program is interactive, make it output a short notice like this 366when it starts in an interactive mode: 367 368 Gnomovision version 69, Copyright (C) 19yy name of author 369 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 370 This is free software, and you are welcome to redistribute it 371 under certain conditions; type `show c' for details. 372 373The hypothetical commands `show w' and `show c' should show the appropriate 374parts of the General Public License. Of course, the commands you use may 375be called something other than `show w' and `show c'; they could even be 376mouse-clicks or menu items--whatever suits your program. 377 378You should also get your employer (if you work as a programmer) or your 379school, if any, to sign a "copyright disclaimer" for the program, if 380necessary. Here is a sample; alter the names: 381 382 Yoyodyne, Inc., hereby disclaims all copyright interest in the program 383 `Gnomovision' (which makes passes at compilers) written by James Hacker. 384 385 <signature of Ty Coon>, 1 April 1989 386 Ty Coon, President of Vice 387 388This General Public License does not permit incorporating your program into 389proprietary programs. If your program is a subroutine library, you may 390consider it more useful to permit linking proprietary applications with the 391library. If this is what you want to do, use the GNU Library General 392Public License instead of this License. 393