On the Subject of Guitar Chords

You hum it, I’ll play it.

  • The module consists of a guitar fretboard, three level displays and a play button.
  • To defuse the module, you must enter the finger positions of the given chords at the capo position.
  • Entering a wrong or invalid chord will cause a strike.
  • Press a fret to select it. Press it again to deselect it.
  • At each level, the capo positions are determined by the tables below. Use the first condition that applies.

Capo Position

Level 1 Level 2 Level 3
Condition Capo Position Condition Capo Position Condition Capo Position
Lit BOB? +9 PS/2 OR Serial? +5 0 battery? +3
Parallel AND RJ45? +7 Vowel in S#? +0 The sum of the S# digits is less than 10? +5
2 or less batteries? +5 6 or more batteries? +9 FRQ? +7
Last digit of S# is odd? +3 Unlit SIG? +7 RCA OR DVI-D? +0
Otherwise +0 Otherwise +3 Otherwise +9

Instruction

  • Add the determined capo position to the chord positions of the displayed chord. Some chord positions are "_" and should be ignored
  • Start at the rightmost position on the fretboard (index 1).
  • For each string from top to bottom, take the corresponding digit from the chord position. If it is a number, press the fret that many frets from the right (1 = the rightmost fret). Otherwise leave them empty.
  • Continue with other chord positions for each chord position, moving from the top string to the bottom.
  • Repeat the process for levels 2 and 3 to solve this.
Chord Name Chord Position Chord Name Chord Position Chord Name Chord Position
Ab 133211 C 332_1_ Em _22___
Ab7 __1112 C7 _3231_ E7 _2213_
Abm7 __11_2 Cm7 __1313 Em7 _2____
A __222_ C# __3121 F7 131211
Am __221_ C#m __212_ Fm7 131111
A7 __2223 C#7 __3424 F# 244322
Am7 __2213 C#m7 __2424 F#m 244222
Bb _13331 D ___232 F#7 __432_
Bbm _13321 Dm ___231 F#m7 __2222
Bbm7 __3324 D7 ___212 G 32___3
B _24442 Dm7 ___211 Gm 133111
Bm _24432 Ebm __4342 G7 32___1
B7 _212_2 Eb7 __1323