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Chess is a strategic game played with two players on a checkered grid. This tag is for challenges related to chess or any variation on chess.

2 votes

Output all the white or black squares of a chessboard

Oracle SQL 11.2, 192 180 bytes SELECT CHR(64+x),DECODE(y,0,8,y)FROM(SELECT CEIL(LEVEL/8)x,MOD(LEVEL,8)y FROM DUAL CONNECT BY LEVEL<=64)WHERE(:1='dark'AND MOD(x+y,2)=0)OR(:1='light'AND MOD(x+y,2)=1)OR( …
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