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Peter Aronson wrote on Wed, Apr 10, 2002 05:25 PM UTC:
The discussion of piece values and the purpose of the variant for <a href='../diffsetup.dir/chigorin.html'>Chigorin Chess</a> reminded me of a conceptually-related idea I had a while ago I called Rook-Level Chess. <p> <h4>Rook-Level Chess</h4> <p> The idea I wanted to explore in Rook-Level Chess is: how would the play of Chess be affected if the Rook, the Knight and the Bishop all had approximately the same value? It seemed to me that threats would be harder at the very least. Anyway, drawing on Ralph Betza's work on the value of Chess pieces I selected stronger Knights and Bishops that retained some of the character of the existing pieces: for Knights I used NW (Knight + Wazir or Marquis), for Bishops I used BD (Bishop + Dabbabah or Bede). These pieces retain the color behavior of the pieces they replace: the Marquis is color-changing, and the Bede is colorbound. <p> I sent this to David Paulowich, and asked him how he thought this would affect exchanges. He replied that we would still prefer a Rook to a Marquis and a Marquis to a Bede, as you could mate with a Rook + King vs King, but not with Marquis + King vs King or Bede + King vs King, and he still though color-switching pieces more valuable than colorbound ones, other things being equal. <h4>Rook-Level Chess II</h4> <p> Given the above comment, I wondered if the powered up Knight and Bishop could retain <i>different</i> characteristics of the base piece? So, for Rook-Level Chess II I replaced the Knight with ND (Knight + Dabbabah or Vicount) and the Bishop with BW (Bishop + Ferz or Dragon-Horse). In this case I retained that the Knight was a strictly leaping piece not attacking adjacent pieces, and I retained that the Bishop was a non-jumping piece. Are these pieces of equal value? And could you mate with Vicount + King vs King? (Dragon-Horse + King vs King is a win.) <h4>Discussion</h4> <p> I've played around with Rook-Level Chess a bit with Zillions for what it is worth, but I strongly suspect it loses somethings that Chess has. If nothing else, weak pieces can be fun since they can harass stronger pieces. <p> Other versions are of course possible. Given that Ralph has settled down to rating the Crooked Bishop (zFF) as equal to a Rook (there being a brief point where he was rating it at 1.5 Rooks), a Crooked Bishop might replace the Bishop nicely. <p> I should eventually add these as modest variants.

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