THE RANGE OF THE 9X9 QUARTAL BOARD IS FOUR OCTAVES, FROM C (TWO LEDGER LINES BELOW THE BASS CLEF) TO C (TWO LEDGER LINES ABOVE THE TREBLE CLEF).
THE RANGE OF THE 9X9 QUARTAL BOARD IS FOUR OCTAVES, FROM C (TWO LEDGER LINES BELOW THE BASS CLEF) TO C (TWO LEDGER LINES ABOVE THE TREBLE CLEF).