Chiba is a bridge player for several decades. He owns the title of a Master of Bridge. He is also a computer specialist and has a degree of MSc. in computer sciences. His email address: [email protected]. Doron Yadlin is a Bridge player and teacher. He owns the title of "Silver Grand Life Master" which is the highest Israeli title. Yadlin won the prestigious European Open Teams Championship in 2003. He won numerous prizes and cups in competitions and contests he attended to. He was also the champion of Israel for several times. Yadlin is a distinguished guest and is invited to participate in tournaments all over the world.