Dortmund's Mario Goetze made the most of a rare start by putting the visitors ahead in the 17th minute, while Hoffenheim hit the bar from a free kick with their only real chance.
However, Dortmund failed to add another goal despite being in complete control of the game and they were punished for it.
The hosts leveled...
Hoffenheim's Juergen Locadia scored a stoppage-time penalty to secure a 2-1 victory at strugglers Cologne on Friday as they provisionally climbed into second place in the Bundesliga.
Cologne's Jhon Cordoba stunned the high-flying visitors with a low drivein the 34th minute, his first goal after a drought that had lasted 26 Bundesliga games.
Croat Kramaric, making his comeback from injury, fired in on the rebound in the 72nd minute and against the run of play after Schalke keeper Alexander Nuebel had palmed Bebou's shot into his path.
The Togolese then drilled in their second goal in the 86th after a defensive blunder and a fine solo run.
Schalke's Daniel Caligiuri...
Hoffenheim's Sargis Adamyan scored his first two Bundesliga goals to stun hosts Bayern Munich 2-1 on Saturday and earn their maiden win in Munich.
The 26-year-old Armenian striker scored either side of a Robert Lewandowski goal as Bayern suffered their first league loss and crashed back down to reality four days after their 7-2 demolition of Tottenham Hotspur in London in the Champions League.
Bayern's first home defeat in 12 months left the title race wide open with Bayern remaining on top with...