 Further , a particular extra move is sometimes more of a liability than an asset . For example , Soltis notes that the Exchange French position arising after 1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nf3 Nf6 " is pretty equal . " The same position , but with Black 's knight moved to e4 , arises in Petroff 's Defense after 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 . That position offers White better chances precisely because Black 's extra move ( ... Ne4 ) allows the advanced knight to become a target for attack . 
 Further , a particular extra move <a href='drop_aux' title='1'><mark>is</mark></a>sometimes more of a liability than an asset . For example , Soltis <a href='uninflect' title='2'><mark>notes</mark></a> that the Exchange French position arising after 1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nf3 Nf6 " <a href='drop_aux' title='3'><mark>is</mark></a>pretty equal . " The same position , but with Black <a href='null_genetive' title='4'><mark>'s</mark></a>knight moved to e4 , <a href='uninflect' title='5'><mark>arises</mark></a> in Petroff <a href='null_genetive' title='6'><mark>'s</mark></a>Defense after 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 . That position <a href='uninflect' title='7'><mark>offers</mark></a> White better chances precisely because Black <a href='null_genetive' title='8'><mark>'s</mark></a>extra move ( ... Ne4 ) <a href='uninflect' title='9'><mark>allows</mark></a> the advanced knight to become a target for attack . 
Further , a particular extra move sometimes more of a liability den an asset . For example , Soltis note dat da Exchange French position arising after 1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nf3 Nf6 " pretty equal . " Tdasame position , but with Black  knight moved to e4 , arise in Petroff  Defense after 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 . That position offer White better chances precisely because Black  extra move ( ... Ne4 ) allow thdadvanced knight to become a target for attack .