The 1997 Deep Blue system was based on an IBM RS/6000 SP supercomputer, using 30 workstation nodes of PowerPC processors controlling 16 chess chips each, distributed over two Micro Channel boards.Ī chess chip features of a full-fledged chess machine on its own, along with move generator, a smart move stack, hardware evaluation function, andĪn alpha-beta hardware search controller. The deepest nodes in the search tree are handled by the slave search engines which usually do 4-ply alpha-beta searches. When conducting a search, the search tree near the root position is processed on the host workstation, and includes selective search extension algorithms such as singular extensions. (This is about 1/10th of the projected speed of the Deep Blue single-processor currently in fabrication.) The 14-processor Deep Thought 2 typically searches between 3 and 5 million positions per second. Each Deep Thought 2 processor searches about 500,000 positions per second standalone, or about 400,000 positions per second as a slave processor. Each processor contains a VLSI chip for move generation, as well as additional hardware for search and evaluation.
Description given in 1995 from the ICGA site :ĭeep Blue Prototype consists of an IBM RS/6000 workstation with 14 chess search engines as slave processors.
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