How to play this note?

[trickybily]

I am sorry for asking such a beginner question, but I need your help.
I have a problem reading this note in the circle:
https://ibb.co/d6vbTh1
I know that I should play both notes at the same time - the half note longer than the quarter note. My problem is: The note in the circle has two "heads" BOTH of which are in the SAME position in the sheet music (just above the highest line of the base clef). For me that signifies that those two are the SAME note: B. How I suppose to play two notes at the same time if both notes are the same?

[dorfmouse]

Just play the B as a half  note.
The score is telling you that theoretically it's a middle voice of three at that point, which if sung might be sung by an alto or tenor while the B and F notes would be sung by a lower voice.

[lelle]

What dorfmouse said. Basically, keep holding the B down while playing the F, and then let them both go at the same time.

[trickybily]

Thank you very much for your answers. I wish you a very happy and successful New Year

[f flat minor]

Its not one single note but of 2 same notes in a voice, which is quite clear because there's one half note and a quarter note. There are many ways to play it. One is just holding the key for the longer duration (that is the half note), or you could hold the notes with both left and right hand (if its feasible depending on the structure) or...
THE METHOD GIVEN BELOW IS A WAY OF FAKING SO YOU MIGHT NOT WANT TO USE IT:
play 2 separate quarter notes, but with a lot of pedal so that it might be hard to distinguish the two notes but not the voices. Hope this helps.
                                 

[dogperson]

Its not one single note but of 2 same notes in a voice, which is quite clear because there's one half note and a quarter note. There are many ways to play it. One is just holding the key for the longer duration (that is the half note), or you could hold the notes with both left and right hand (if its feasible depending on the structure) or...
THE METHOD GIVEN BELOW IS A WAY OF FAKING SO YOU MIGHT NOT WANT TO USE IT:
play a dotted half note and then another quarter note, but with a lot of pedal so that it might be hard to distinguish the two notes but not the voices. Hope this helps.
                                 

I do not understand your suggestion.  Iv you play one note as a dotted half note, you have played that note for the full duration of sound allowed:  three beats.  If you play another note now, it would be on beat four, which is not acceptable to add an extra beat.

Please let me know what I have misunderstood in your method

[f flat minor]

Okay I have modified this now, I meant two quarter notes, with a sustain pedal, not one dotted half and quarter, my bad.