Katsutoshi Seki's private page

Shogi, Chess, Backgammon

• Chess playing system
• Shogi and Chess variant
• Tsume Shogi (Shogi Mating Problems)
• Copyright of game score
• Backgammon My another hobby

Other sites

• Official page where I am working
• Profile at LinikedIn
• Facebook
• Twitter: @seki_cestqui
• Wikipedia: Katsutoshi Seki

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