It wasn't until 1886, in a match versus Johann Zukertort, that a winner was officially given the title of world champion. Steinitz won with a score of ten wins, five losses, and five draws. He then successfully defended his title several times before losing, at the age of 58, to the young Emanuel Lasker.
In a world championship match game against the great Russian player Mikhail Chigorin played in 1892 in Havana, the position in part a is reached after the 23rd move of the game.
The obvious move for Steinitz, as white, would have been to play 24. Bxd4+, but that would have allowed black to fight on with 24… . Rf6. Instead, Steinitz administered the coup de grace with 24. Rxh7+.
Sacrificing such a large amount of material is counterintuitive to most players.
The game concludes with the following moves:
24. … Kxh7
25. Qh1+Kg7
26. Bh6+Kf6
27. Qh4+Ke5
28. Qxd4+1-0
Black resigns, because 28… Kf5 would have been met by 29. g4#.