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Archchess. Large chess variant from 17th century Italy. (10x10, Cells: 100) [All Comments] [Add Comment or Rating]
Jean-Louis Cazaux wrote on Wed, Oct 19, 2022 08:52 PM UTC in reply to H. G. Muller from 07:42 PM:

Yes indeed, I had not noticed how unclear is this page! There is not a word about castling at this variant in the original Italian text. It safely can be supposed that castling, pawn's promotion, etc. were following the standard chess rules that Piacenza was playing with. In my book with Rick K we wrote the following:

"Piacenza did not provide other rules specific to this game. It may be supposed that they follow those he gave for regular chess.i Castling is free according to the Italian fashion of the time in which the King may move to any of the vacant squares between King and Rook, and the Rook moves around the King to any spot up to the King’s square of departure. Pawns promote only to Queens."

H. G. Muller wrote on Wed, Oct 19, 2022 07:42 PM UTC in reply to Jean-Louis Cazaux from 12:49 PM:

Since you seem to know this game, what about the castling? The description in the CVP article was totally confusing for me. So I only implemented the Dababba leap that was mentioned, as an initial move.

Jean-Louis Cazaux wrote on Wed, Oct 19, 2022 12:49 PM UTC:

For those interested in history, the move of the Champion of Arciscacchiere invented by Piacenza is clearly only crossing empty squares when "travelling" two squares as Rook or Bishop (p118). So, the Centurion cannot leap occupied squares as Alfil or Dabbaba. Piacenza insisted on this point several times in his description. (ex p119,p123). In Betza notation it is NnAnD. The Centurion is not a Squirrel.

However, Murray did not understand correctly and described the Centurion as a jumper in the eight directions. Pritchard repeated that definition given by the English historian and added the Knight’s leap that Murray had forgotten. He had forgotten it because Piacenza explains to have added the move of the Knight only few pages later. (The presentation of the rules by Piacenza is a bit messy).

So few pages later (p120), Piacenza confessed to have spoken with a certain Mr. Fantone which would have allowed him to have seen a chess book in which a Centaur also had the Knight’s power. Piacenza decided to adapt this idea in order to allow his new piece to reach any square on the board (otherwise the Centurion would have been color-bound and limited to half the board).

So, Piacenza’s Centurion jumps when moving like a Knight but does not leap on the rows, columns and diagonals.

In my opinion, the CVP would be inspired to give the genuine rules and not the wrong ones.

Piacenza's book is findable on the Internet. I can provide the photographs of those pages if someone is interested.

Last word for HG: there is nothing about a specific en-passant rule in that description of Arciscacchiere by Piacenza. So your implementation is not incorrect in my opinion. The description of this variant being at the end of Piacenza's technical book about chess, it is possible that this peculiar restriction was given for the orthodox chess that was presented by Piacenza. Then, someone would have extrapolated to the large chess variant as well. Again, we are not obliged to follow this as it is not written.

Parker KH wrote on Sun, May 22, 2022 05:05 PM UTC in reply to Daniel Zacharias from Fri Nov 27 2020 09:04 PM:Good ★★★★

i think so

Daniel Zacharias wrote on Fri, Nov 27, 2020 09:04 PM UTC:

the rook moves one or more squares towards the original position of the king; the king moves one or more squares towards the original position of the king.

Shouldn't the last word there be "rook"?

George Duke wrote on Tue, Oct 18, 2016 07:53 PM UTC:Good ★★★★

ArchChess in the 17th century has what we call now Squirrel, D+A+N. Recently there was Hippogriff found in Tamerlane Chess of 14th century, where Hippogriff restricts 13th century Grande Acedrex Gryphon to its distant squares. Tamerlane or Timur's also has Dabbabah, so the Dabbabah had been around for ArchChess to pick up and make the probably first tri-compound it calls Centurion, settled on as Squirrel or Betzan AND today -- the order does not matter in Funny Notation compounds, so long as they are not sequential or double move pieces.

So Quintessential Chess is one new CV using 17th century Centurion/Squirrel, and there are 19th C. games with Squirrel for a continual line of succession.

Greg Strong wrote on Tue, Feb 8, 2005 12:02 AM UTC:Good ★★★★
I have played this game many times now, and consider it to be very good. It would rate 'Excellent' compaired to other CVs of its era (I like it better than Carrera's Game.) I think Archchess would be even better, though, on a 10x8 board.

George Duke wrote on Mon, Feb 7, 2005 09:09 PM UTC:Good ★★★★
'ABCLargeCV': With low piece-density(40%) and Pawn's needing strengthening by later CV standards, Archchess from about 1683 features a new piece Centurion. Squirrel is now the favoured name for the type of three-directional two-square leaper. One good use of Centurion/Squirrel is 2002 Quintessential Chess. Contrast the power density here with 17th-century Carrera Chess' high power density. Archchess has not so many major pieces and two more rows than Carrera's; both factors contribute to its relatively low PD. The two forms of chess originate in southern Europe which had the best players then.

Greg Strong wrote on Wed, Jul 28, 2004 04:31 PM UTC:

ChessV now supports this game. Since some rules are not known exactly, I had to make some guesses based on information on this page. So here you have it:

Castling: Castling is allowed if neither piece has moved previously. The King always slides 3 squares when castling to either side. The King may not castle into or through Check, but there is no prohibition against castling out of Check.

King's Leap: The King may also make a single 2-space leap horizontally or vertically on its first move. You may not leap into Check, but may leap out of it. Attacks on the square jumped over are irrelevant.

Misc: The special 2-space pawn move restriction mentioned here is implemented. Stalemate and 3-time repetition are considered draws. The 50-move pawn rule is also in effect.

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