The following third party tools have been a great help in developing Colossus over the years...

• Arena: GUI used for analysis and running tournaments
• Cute Chess: GUI/CLI used for analysis and running tournaments
• BLH - Bitboards Little Helper 2: Invaluable utility to visualise and manipulate 64-bit bitboard values
• LOS/Uncertainty Calculator: Caclulates the LOS and ELO error margins for a tournament result. Part of a suite of six tools

Other files which may be useful...

• PerftTestPositions.zip: A file of nearly 7000 test positions with their Perft(6) values
• Chess960PerftTestPositions.zip: A file of 960 test positions with their Perft(6) values for Chess960/FRC
• 3, 4, 5, 6 & 7 piece SYZYGY endgame tablebase md5 checksum files for validation (separated out for ease of use)