13b9 chords
A dominant thirteenth with a flattened ninth. The b9 adds real bite and urgency, which makes the eventual resolution feel stronger. It is at home in jazz turnarounds and in flamenco tinged progressions where the dominant needs extra drama.
Other chord types
MajorMinorDiminishedAugmentedSuspended 2ndSuspended 4thDominant 7thMajor 7thMinor 7thMajor 6thMinor 6thMinor Major 7thDiminished 7thHalf-Diminished 7thAugmented 7thAdd9Dominant 9thMajor 9thMinor 9th6/9Dominant 11thMinor 11thDominant 13thMajor 13thMinor 13th7sus47b57b97#9Dominant 7#11Minor 6/99sus4Power Chord (5)Minor Add9Add117sus213sus4Minor Major 9thMajor 7#11Major 9#117b1313#117altAugmented Major 7thMinor 9b5Quartal (So What)