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'''[[Main Page|Home]] * [[Engines]] * Raffaela'''
[[FILE:Raffaello Sanzio.jpg|border|right|thumb|240px| Raphael <ref>Self-portrait of Raphael, aged approximately 23, between 1504 and 1506, [https://en.wikipedia.org/wiki/Uffizi Uffizi], [https://en.wikipedia.org/wiki/Raphael Raphael from Wikipedia], [https://en.wikipedia.org/wiki/Wikimedia_Commons Wikimedia Commons]</ref>
]]
'''Raffaela''',<br/>
a [[WinBoard]] compatible chess program by [[Stefano Gemma]] with an own [[GUI]], first announced in August 1996, and [[Windows]] successor of Stefano's former [[MS-DOS|DOS]] program [[Drago]] from the early 90s. The chess playing algorithm is implemented in [[8086]] [[Assembly|assembly]] with impressive [[Nodes per Second|nodes per second]] <ref>[http://www.oocities.org/gmasciulli/indexOld.html Golem's Page] by [[Gianluigi Masciulli]] (archived)</ref> due to very fast [[Move Generation|move generation]] with indirect jumps and branching on multiple processor flags, which was further used in Stefano's later program [[Freccia]] <ref>[http://www.talkchess.com/forum/viewtopic.php?t=39873 Assembly move generation in Freccia] by [[Stefano Gemma]], [[CCC]], July 26, 2011</ref>. Raffaela uses Stefano Gemma's reinvention of [[Alpha-Beta]], dubbed '''AlfaGemma''' <ref>[http://www.talkchess.com/forum/viewtopic.php?t=61024 AlfaGemma is back] by [[Stefano Gemma]], [[CCC]], August 03, 2016</ref>, but lacks [[Quiescence Search|quiescence search]] <ref>[https://www.stmintz.com/ccc/index.php?id=130537 Drago] by [[Carmelo Calzerano]], [[CCC]], September 25, 2000</ref>.
Raffaela was likely the first Italian program able to play on the Internet <ref>[http://www.oocities.org/gmasciulli/indexOld.html Golem's Page] by [[Gianluigi Masciulli]] (archived)</ref>. It played multiple [[Italian Computer Chess Championship|Italian Computer Chess Championships]] from [[CIPS 2001|2001]] until [[CCC 2008|2008]], and had its best result at [[CIPS 2007]] with 2½/6.
* [https://en.wiktionary.org/wiki/Raphaela Raphaela - Wiktionary]
* [https://en.wikipedia.org/wiki/Rafael Rafael (disambiguation) from Wikipedia]
* [https://en.wikipedia.org/wiki/Raphael Raphael (Raffaello Sanzio da Urbino ) from Wikipedia]
* [https://en.wikipedia.org/wiki/Raphael_%28given_name%29 Raphael (given name) from Wikipedia]
* [https://en.wikipedia.org/wiki/Raphael_%28disambiguation%29 Raphael (disambiguation) from Wikipedia]
