Chess Problem Database Server is online database of chess problems all types maintained by Gerd Wilts. Database incorporated John Niemann collection and the work of a lot of contributors. Database has 144. 659 problems (as of August 2007). Problems are represented graphically with solutions and commentary.

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  • Chess Problem Database Server is online database of chess problems all types maintained by Gerd Wilts. Database incorporated John Niemann collection and the work of a lot of contributors. Database has 144. 659 problems (as of August 2007). Problems are represented graphically with solutions and commentary. (en)
  • El Chess Problem Database Server o PDB Server es una base de datos online de problemas de ajedrez de todos los tipos mantenida por Gerd Wilts. La base de datos incorpora la colección de John Niemann y el trabajo de muchos contribuyentes. La base de datos tiene 144. 659 problemas (en agosto de 2007). Los problemas se representan gráficalmente con soluciones y comentarios. (es)
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  • Chess Problem Database Server is online database of chess problems all types maintained by Gerd Wilts. Database incorporated John Niemann collection and the work of a lot of contributors. Database has 144. 659 problems (as of August 2007). Problems are represented graphically with solutions and commentary. (en)
  • El Chess Problem Database Server o PDB Server es una base de datos online de problemas de ajedrez de todos los tipos mantenida por Gerd Wilts. La base de datos incorpora la colección de John Niemann y el trabajo de muchos contribuyentes. La base de datos tiene 144. 659 problemas (en agosto de 2007). (es)
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  • Chess Problem Database Server (en)
  • PDB Server (es)
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