Paul+Wiereyn

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 * Home * People * Paul Wiereyn**

a Dutch chess problem composer and chess solving engine programmer. Paul H. Wiereyn is author of a free [|Sudoku] program and the Windows GUI APwin for the chess problem solving programs Alybadix and Popeye.
 * Paul H. Wiereyn**, (born 1936)

=0x88= In his 1985 paper //Inventive Problem Solving//, Paul Wiereyn already described 0x88 coordinates with nibbles for ranks and files inside a byte, and used such square differences (mod 256) as table-index to determine pinned pieces and discovered checks in his problem solving program: code Rd5 - Kf5 <=> 45 - 65 = E0, hexadecimals and reduction modulo 256 being implied throughout. code ||

=Selected Publications=
 * Paul Wiereyn (**1985**). //Problem-Solving Ability Tested II//. ICCA Journal, Vol. 8, No. 3
 * Paul Wiereyn (**1985**). //Inventive Problem Solving//. ICCA Journal, Vol. 8, No. 4
 * Paul Wiereyn (**1997**). //Genius-3 Cooked Endgame Studies//. ICCA Journal, Vol. 20, No. 3 » Chess Genius

=External Links=
 * [|apwin]

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