Enter Your Reply The Comment You're Replying ToSam Trenholme wrote on 2007-06-20 UTC OK, I have been doing some thinking about Capablanca chess variants. As discussed before, there are some 126,000 possible Capablanca opening setups, where the bishops are on opposite colors, and where the queen is to the left of the queen. However, looking at all of the Capablanca opening setups which have actually been proposed, I observe that:All of the opening setups have the king and a powerful (R+N,B+N, or Queen) piece in the center filesAll of the proposed opening setups are symmetrical with the rooks, knights, and bishopsAll of the proposed opening setups have the rooks either in the corners, or one file closer to the center than the corners. As it turns out, there are only 72 possible Capablanca opening setups that follow all of the above rules. Of these 72 opening setups, I find that only 15 have been formally proposed as starting setups: RANBQKBNMR Aberg RMNMQKBNAR Carrera RNBMQKABNR Bird RNBAQKMBNR Capa 1 (Suffers from 1.Mh3 mating threat) RNABQKBMNR Capa 2 RBQNKMNABR Grotesque RBNMQKARBN Univers RBQNKANMBR Landorean RNBQKMABNR Embassy RQNBAKBNMR Schoolbook NRMBQKBARN Optimized MRNBQKBNRA Paulovich 1 link ARNBQKBNRM Paulovich 2 link QRNBKABNRM Paulovich 3 RNMBQKBANR Nalls link All of these, should I note, are perfectly playable, with the exception of Capa 1, and all of these have not had their openings explored nearly enough. Doing some slightly creative math, that leaves us with 56 possible starting setups. Here are some interesting ones, with names that I propose for them: RNBQKAMBNR Consulate RNQBKMBANR Finesse RNQBKABNMR Notebook QRNBAKBNRM Closebook QRNBKABNRM Blackbook Here are three openings setups that are unplayable: RNBQAKMBNR 1. Mh3 mating threat QRNBMKBNRA 1. Md3 mating threat QRNBKMBNRA 1. Mh3 mating threat Now, if instead of a R+N and B+N piece, we add two colorbound Camel + Bishop (Sage) pieces, and have an 8x10 board, we have 36,000 total possible opening setups (Sages and Bishops on opposite colors, queen to the left of the king). Of those, all of 12 meet the requirements above: 1. SRNBQKBNRS 2. RSNBQKBNSR 3. RNSBQKBSNR 4. RNBSQKSBNR 5. SRBNQKNBRS 6. RSBNQKNBSR 7. RBSNQKNSBR 8. RBNSQKSNBR 9. NRSBQKBSNR 10. NRBSQKSBRN 11. BRSNQKNSRB 12. BRNSQKSNRB Of these 12 setups, I find 1, 4, and 12 the most interesting. No, I'm not proposing a new variant. I first need to fully explore the opening in Schoolbook. :) Edit Form You may not post a new comment, because ItemID 72 Capa variants does not match any item.