rag.ly · 77 lines
\version "2.24.0"
\header {
title = "Espresso Rag"
subtitle = "for café piano"
tagline = ##f
}
% Right hand starts in the treble staff, left hand in the bass staff.
% In bars 9-12 the hands cross: the LH (now higher) moves to the treble
% staff and the RH (now lower) moves to the bass staff. Switches happen
% at barlines with \change Staff.
rhMusic = {
% bars 1-8: RH in treble
e'8 g' c'' g' e'4 c'4 |
d'8 g' b' g' d'4 g'4 |
c'8 f' a' f' c'4 f'4 |
c'8 e' a' e' c'4 e'4 |
d'8 g' b' g' d'4 f'4 |
c'8 e' g' e' c'4 e'4 |
b8 d' g' d' b4 d'4 |
<c' e' g'>1 |
% bars 9-12: RH crosses down to bass staff
\change Staff = "lower"
c2 g2 | f2 c'2 | g2 d'2 | c1 |
% bars 13-16: RH back to treble
\change Staff = "upper"
e'8 g' c'' g' e'4 c'4 |
f'8 a' c'' a' f'4 c'4 |
d'8 g' b' g' d'4 g'4 |
<c' e' g'>1 \fermata \bar "|."
}
lhMusic = {
% bars 1-8: LH in bass
c,4 g,4 c4 g,4 |
g,4 d4 g4 d4 |
f,4 c4 f4 c4 |
f,4 c4 a,4 c4 |
g,4 d4 g4 d4 |
c,4 g,4 c4 g,4 |
g,4 d4 g4 d4 |
c,1 |
% bars 9-12: LH crosses up to treble staff, playing above the RH
\change Staff = "upper"
g''8 e'' c'' e'' g''4 c'''4 |
a''8 f'' c'' f'' a''4 c'''4 |
b''8 g'' d'' g'' b''4 d'''4 |
c'''8 g'' e'' g'' c'''4 g''4 |
% bars 13-16: LH back to bass
\change Staff = "lower"
c,4 g,4 c4 g,4 |
f,4 c4 f4 c4 |
g,4 d4 g4 d4 |
c,1 \fermata
}
\score {
\new PianoStaff <<
\new Staff = "upper" <<
\tempo "Allegro" 4 = 116
\clef treble
\key c \major
\time 4/4
\new Voice = "rh" { \rhMusic }
>>
\new Staff = "lower" <<
\clef bass
\key c \major
\time 4/4
\new Voice = "lh" { \lhMusic }
>>
>>
\layout { }
}Espresso Rag, with the left hand crossing over: Claude Haiku 5.5
modelanthropic/claude-haiku-5.5tasklilypond-espresso-rag@v1, checks c1, harness h1date2026-10-08rounds1 of 8 allowed, 12 minutes on the clockcost$0.0122thinkingmediumtokens36,873 in, 22,270 out, of which 19,171 reasoningtime1 min 55 sfailedRight hand keeps going: incomplete, component missing, major, near miss: 1 bar where the right hand plays too little, its note named the fault · Crossing marked: incomplete, annotation missing, minor, 0 of 2 marks, the crossing and its release, its note said nothing was wrong
Piano staffdecided by a number, from the filepass
Sixteen barsdecided by a number, from the filepass
Left hand crossesdecided by a number, from the filepass
Right hand keeps goingdecided by a number, from the filefail
Crossing markeddecided by a number, from the filefail
Stems apartdecided by a number, from the filepass
There is no post about this one, since only some results need one, so the picture, the source and the scoring are here instead.
Write, in LilyPond, 16 bars of café piano music called "Espresso Rag" in which the left hand crosses over the right hand for bars 9 to 12.Frozen at v1. This model got this and nothing else.
LilyPond's own record of every note: its hand, staff, bar, pitch and stem, read while the file is engraved. A voice belongs to the hand whose staff it starts on, unless its notes are labelled with a hand's name. The script was written after hearing Sol's and Pareto's runs, so Luna was its first fair test. How good the music sounds is rated by ear. How it is scored, and this run's files on GitHub.