Quest,
a chess engine by Frans Morsch which evolved from Nona to became the code base for various commercial programs and dedicated computers, most notably the famous ChessBase engine Fritz in 1991, and the TASC engine Chessica in 1995, after Fritz sensationally won the WCCC 1995. The 6502 version of Quest was further commercialized as 8 bit Sphinx by Newcrest Technology[1][2] , and was also ported to the H8 processor, as used in many dedicated units of various manufacturers in the early 90s, such as the Saitek Brute Force and GK 2100. Later, Quest was often used as experimental version of Fritz in tournaments. Quest was the strongest chess program at Aegon 1996[3] . It won the DOCCC 1988, DOCCC 1994, and the DOCCC 1999, while during the DOCCC 2001 there was an attempt of an name change from Fritz to Quest [4][5] .
Frans Morsch, as well as other Dutch computer chess programmers like Bart Weststrate and Dap Hartmann[8] , did early experiments with recursivenull move pruning in the late 80s, likely after it was discussed at the panel workshop during the WCCC 1986 after Don Beal's talk covering null move [9] . Frans Morsch told Chrilly Donninger about recursive null move, who popularized it by his Null Move and Deep Search paper in the ICCA Journal 1993 [10] .
a chess engine by Frans Morsch which evolved from Nona to became the code base for various commercial programs and dedicated computers, most notably the famous ChessBase engine Fritz in 1991, and the TASC engine Chessica in 1995, after Fritz sensationally won the WCCC 1995. The 6502 version of Quest was further commercialized as 8 bit Sphinx by Newcrest Technology [1] [2] , and was also ported to the H8 processor, as used in many dedicated units of various manufacturers in the early 90s, such as the Saitek Brute Force and GK 2100. Later, Quest was often used as experimental version of Fritz in tournaments. Quest was the strongest chess program at Aegon 1996 [3] . It won the DOCCC 1988, DOCCC 1994, and the DOCCC 1999, while during the DOCCC 2001 there was an attempt of an name change from Fritz to Quest [4] [5] .
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Null Move
Frans Morsch, as well as other Dutch computer chess programmers like Bart Weststrate and Dap Hartmann [8] , did early experiments with recursive null move pruning in the late 80s, likely after it was discussed at the panel workshop during the WCCC 1986 after Don Beal's talk covering null move [9] . Frans Morsch told Chrilly Donninger about recursive null move, who popularized it by his Null Move and Deep Search paper in the ICCA Journal 1993 [10] .Selected Games
DOCCC 1988, round 03, Quest - Rebel [11]Game and short analyze on Lichess.org : https://fr.lichess.org/8KCoX1lG
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