Rubuta ci gaba ga wannan sakin layi - Idan aka kwatanta da manyan wasannin da suka gabata kamar gasar wasan chess ta London 1851, gasar wasan chess ta London 1862
da Paris 1867 gasar wasan chess, akwai manyan sabbin abubuwa guda biyu: an yi amfani da agogon chess a karon farko (ya kamata a yi motsi 20 a kowace awa), kuma ana lasafta zane a matsayin rabin maki.