The calculations for 6 pieces playing against a lone king weren’t done because the outcome is rather obvious. In 2005, 6-piece endings were solved in Nalimov Tablebases which are now used by many professional chess programs and services.Įxperts didn’t expect 7-piece endings to be cracked and catalogued until after 2015, but Convekta Ltd, namely programmers Zakharov and Makhnichev - the developers of the Aquarium interface - managed to solve this task in just 6 months using a new algorithm designed specifically for this purpose and run on the Lomonosov supercomputer based in the Moscow State University.Īs a result, we now have 525 tablebases of the 4 vs. In the beginning of the 90-s, the same task was done for 5-pieces. The first ending tablebases - for all 4-piece endgames - were built by the end of the 80-s.
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