Concave line chessboard

A chessboard features that the liens on it are made up by carving, so becoming concave lines.

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Bibliographische Detailangaben
1. Verfasser:	TONGQUN YANG
Format:	Patent
Sprache:	eng
Schlagworte:	AMUSEMENTS CARD, BOARD, OR ROULETTE GAMES GAMES GAMES NOT OTHERWISE PROVIDED FOR HUMAN NECESSITIES INDOOR GAMES USING SMALL MOVING PLAYING BODIES SPORTS VIDEO GAMES
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Beschreibung
Zusammenfassung:	A chessboard features that the liens on it are made up by carving, so becoming concave lines.