 Watson concludes that ( a ) " most moves have disadvantages as well as advantages , so an extra move is not always an <unk> blessing " ; ( b ) " with his extra information about what White is doing , Black can better react to the new situation " ; and ( c ) because a draw is likely to be more acceptable to Black than to White , White is <unk> to avoid lines that allow <unk> <unk> , while Black may not object to such lines . 
