 Rowson cites as an example of the last phenomenon the well @-@ regarded Zaitsev Variation of the Ruy Lopez . After 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5 @.@ 0 @-@ 0 Be7 6.Re1 b5 7.Bb3 0 @-@ 0 8.c3 d6 9.h3 Bb7 10.d4 Re8 ( initiating the Zaitsev Variation ) , White can repeat moves once with 11.Ng5 Rf8 12.Nf3. This puts Black in an awkward situation , since he must either ( a ) insist on the Zaitsev with 12 ... Re8 , which allows White to choose whether to draw by threefold repetition with 13.Ng5 Rf8 14.Nf3 , or play on with a different move , or ( b ) play a different ( and possibly inferior ) variation by playing something other than 12 ... Re8 . 
