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a Finnish chess and [https://en.wikipedia.org/wiki/Correspondence_chess correspondence chess] player <ref>[https://www.iccf.com/PlayerDetails.aspx?id=461001 ICCF Player Details | Mikko Aarnos]</ref>, software developer, and computer chess and games programmer. He is author of the [[UCI]] compabtile [[:Category:Open Source Engines|open source chess engine]] [[Hakkapeliitta]], of ''QSimulator'', a [[Cpp|C++11]] program created with the help of the [https://en.wikipedia.org/wiki/Eigen_%28C%2B%2B_library%29 Eigen] [https://en.wikipedia.org/wiki/Linear_algebra linear algebra] library which can be used for [https://en.wikipedia.org/wiki/Dynamical_simulation simulating] a [https://en.wikipedia.org/wiki/Quantum_computing quantum computer] in the [https://en.wikipedia.org/wiki/Quantum_circuit quantum circuit] [https://en.wikipedia.org/wiki/Conceptual_model model] of [https://en.wikipedia.org/wiki/Computation computation] <ref>[https://github.com/mAarnos/QCSimulator mAarnos/QCSimulator · GitHub]</ref>, and further is woking on the [[Go]] playing program ''Accelerator'' <ref>[https://github.com/mAarnos/Accelerator mAarnos/Accelerator · GitHub]</ref>.