The Rishal is a recent invented form which appears to be a “chained” version of the Terza Rima without a linking rhyme. It was created by “Chindarella” at All Poetry.
Stanzaic: Three tercet stanzas plus a single line stanza
Isosyllabic: Decasyllabic lines (10 syllables) (10/10/10)
Rhyme Pattern: aba cdc efe ghg x (end-rhyme and internal rhyme)
Refrain: The first line of each stanza consists of two
five syllable sections, The last section of line 1
becomes the first section of line 1 in the next stanza.
The 2nd line in each stanza must have internal rhyme with the 5th syllable
rhyming with the 10th.
The final line does not need to rhyme;
The Rishal is:
○ Stanzaic, written in 3 or more tercets with a concluding single line, the same as the Terza Rima.
○ Syllabic rather than metric, lines of 10 syllables each, (iambic pentameter without the iambic pattern requirement). L1 of each stanza is written in 2 hemistiches.
○ Rhymed, internal rhyme is employed in L2 of each stanza, the 5th syllable of the line rhyming with the end syllable, (I imagine a little flexibility in the placement of the internal rhyme could be overlooked by other than the purist.) Rhyme scheme a (b-b) a / c ( d-d) c / e (f-f) e / etc . The single end line is unrhymed.
○ Written in a chain from stanza to stanza by repeating the 2nd hemistich of L1 of the previous stanza in the 1st hemistich of L1 of the next stanza and so on. . . including the last single line repeating the 2nd hemistich of L1 of the previous stanza as the 1st hemistich of the single line
Pasted from http://www.poetrymagnumopus.com/index.php?showtopic=1146
My thanks to Judi Van Gorder for years of work on this fine PMO resource.