File generated from the SVG output of Lilypond using the following file, updated from User:Antur's Lilypond file using convert-ly:

\version "2.10.10"

staffPiano = {  
  \new PianoStaff {
    \time 6/8
    <<
    \context Staff = "up" {
      \clef treble
       {
        \set Staff.midiInstrument = #"acoustic grand"
        #(set-accidental-style 'modern)
        \partial 8
        \relative c''{
          <<  { s8
          s2.
          gis4.~( gis4 a8 ais b4~ b8) }
          \\
          { a,8(
          f'4.~ f4 e8
          dis2.)( d4.)~ d8 } >>
            r8 r
        }
      }
    }
    \context Staff = "down" {
      \clef bass
       {
        \set Staff.midiInstrument = #"acoustic grand"
        \partial 8
        \relative c{
          r8
          R2.
          <f b>2.(
          <e gis>4.)~ <e gis>8 r r
        }
      }
    }
    >>
  }
}

\score {
  \staffPiano

  \layout {
    indent = 0.0\mm
    ragged-right = ##t
  }
  
  \midi {
    \context {
      \Score
      tempoWholesPerMinute = #(ly:make-moment 105 8)
      }
    }
}

Rework with Inkscape:

1. removed text and converted all objects to paths,
2. updated some items,
3. then saved as simple SVG.

DescriptionTristanChord.svg	English: Tristan chord, in Richard Wagner's Tristan und Isolde beginning (piano reduction) Français : Accord de Tristan dans le début du Tristan et Isolde de Richard Wagner (réduction pour piano)
Date	13 October 2008
Source	Own work
Author	Romainbehar
Permission (Reusing this file)	Public domainPublic domainfalsefalse This work has been released into the public domain by its author, Antur. This applies worldwide. In some countries this may not be legally possible; if so: Antur grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
Other versions	Image:Wagner Tristan opening.png, File:Tristan chord.png