shared notes across piano staff

[Robert Garrigos]

Hi,

I have this piano excerpt I’m trying to reproduce:

and I have this code:

\score {

<<

\new PianoStaff

<<

\new Staff \relative c' {

\key g \minor

\time 3/4

|

{ ef4^( c d~ | d8 c bf!4 a) }

}

\new Staff \relative c' {

\key g \minor

\time 3/4

\clef bass

| <<

{ \omit TupletBracket \omit TupletNumber \tuplet 3/2 4 { r8 ef, a c, ef a d, af' b | r8 c, g' bf d, g a d, fs} }

\\

{ }

\\

{ }

>>

}

>>

>>

}

which gives me:

how can I have the bf and the a in the second measure shared across the staves??

Thanks

========================
Robert Garrigós i Castro
Web personal: https://garrigos.cat
Web de feina: https://techora.cat