c u t tng i chn chu vi cht lng cng nh ch¨ªnh x¨¢c, cng c n¨¤y c thit k c v¨¤ phn t¨ªch thut to¨¢n vi t l thng l¨ºn n 92%. Ngi tham gia ch cn i ti a 5 giy ly kt qu ca cc cho lt chi t¨¤i xu k tip. Mc Lc Cng ging nh vic xy nh¨¤, ch¨²ng ta u cn thc hin bc ¨¤o v¨¤ xy m¨®ng chc chn cho ngi nh¨¤. i vi cng vic soi k¨¨o th¨¬ y ch¨ªnh l¨¤ vic s hu mt lng kin thc nn khng ch v b¨®ng ¨¢ m¨¤ c¨°n v k¨¨o. Hy hiu mt c¨¢ch n gin, khng c¨® k¨¨o th¨¬ ch¨²ng ta chng c¨® mt th g¨¬ phn t¨ªch hay soi c. Phn loi qun b¨¤i Bn c¨¢ thu h¨²t ngi chi vi nhiu u im ni bt Ngi n¨¤o bit b¨¤i ca m¨¬nh b quc nhng c t¨¬nh bc th¨ºm ph¨¢ nhng ngi sau r¨²t b¨¤i s b x thua. Vic n¨¤y tr¨¢nh t¨¬nh trng lng on c¨¢c l¨¢, gy bt li cho lt k tip. Theo quy nh v lut chi b¨®ng b¨¤n ca ITTF, c¨¢ch t¨ªnh im b¨®ng b¨¤n c¨® nhng nguy¨ºn tc c bn nh sau: C¨¢ch t¨ªnh l xi¨ºn 3 Mi tun c¨® h¨¤ng ngh¨¬n ngi chi tng qu¨¤ Chng hn nh chm 1-7 c¨® th to th¨¤nh nhng d¨¤n s nh 01, 07, 10 ¨C 19, 21, 27, 31, 37, 41, 47, 51, 57,¡­. T ¨® bn cng c¨® th d d¨¤ng to ra d¨¤n 36 s bt bi vi kh nng chin thng cao. Cc l ¨C t l 3:1. lt u ti¨ºn, bet th khng n¨ºn b vn v¨¤o qu¨¢ nhiu.

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