This Fugue, from Johann Sebastian Bach's 48 Preludes and Fugues (known as The Well Tempered Clavier), is the final one from book 1 of the set and is in 4 parts. With the descending semitone figure repeated several times in the main theme, this fugue is one of the most chromatic of the set and should be played a little slower than its corresponding Prelude also in the same key of B minor, and together catalogued as BWV 869. This is the original version of the fugue for piano or clavier, but we also have a version for String Quartet.
Although there are some easier preludes and fugues in the set, much of Bach's Well-Tempered Clavier is quite challenging to play. However the complete set has for a long time been considered a must for any serious student of piano. Some other preludes and fugues from the set are available on mfiles if you check the Bach page or Classical Sheet Music page. If you have aspirations to be a good classical pianist then we recommend getting the complete Well-Tempered Clavier which comes in two books. Here are links on "sheet music plus" to Book 1 and Book 2 of the Well-Tempered Clavier.
Here is a video of Bach's Fugue No.24 from book 1 as a piano roll animation:
The audio controls below allow you to play the mp3 version of Bach's Fugue No. 24 in B minor from Book 1 or you can download the MP3 file. You can also download the midi version of Bach's Fugue No. 24 in B minor from Book 1 or alternatively edit/play the midi file.
The image below is the first page of the sheet music, and here you can download the full sheet music for Bach's Fugue No.24 from book 1 in PDF format.