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H. G. Muller wrote on Sat, Oct 14, 2017 08:53 PM UTC:Dropped Rooks have no castling rights. Pawns dropped on the 2nd rank do have a double push, though.
Thanks H.G.
I find it a bit odd that dropped rooks do have castling rights in bughouse (see tandem chess rules page), yet not in crazyhouse. Due to having different inventors, I suppose.
H. G. Muller wrote on Sat, Oct 14, 2017 10:23 PM UTC:Well, I am not sure the latter is correct. I never wrote a Bughouse engine. But I inquired about Crazyhouse rules last year, because I did write a Crazyhouse engine then. And it turns out this is the rule by which all other engines, and the FICS, ICC and LiChess servers play. I would be surprised if these servers would apply other rules to Bughouse.
Pawn drop checkamte is not possible on Shogi. Habu Yoshiharu said to Shogi, "If the Pawn drop checkmate is possible, the first player win." However, Pawn drop checkmate is available in Crazyhouse. Is there any reason why Pawn drop checkmate is possible in Crazyhouse?
Only the creator of this game, whose identity is unknown, could speak authoritatively on this. I will point out that this game is based on Bughouse, not on Shogi, and it's resemblance to Chessgi is coincidence. Since Betza omitted the same rule in Chessgi, you might have better luck asking him why he omitted it. However, he is no longer active here.
Thanks for answering!
H. G. Muller wrote on Sat, Feb 13, 2021 05:59 PM UTC:A more natural question would be: "is there any reason why checkmating with a pawn drop is forbidden in Shogi?". You can checkmate by dropping any other piece, so why would a special exception for Pawns be needed? Or for drop moves, as it is perfectly allowed to checkmate with a Pawn move on the board. It is a highly irregular rule exception. Unlike in Crazyhouse, where all pieces are treated the same in this respect. (But there it can be considered strange that Pawn dropping on the back rank is not allowed...)
That Shogi forbids dropping of Pawns in files that already contain one is understandable from the fact that Pawns capture straight forward there: without this rul you would quickly build an impenetrable fortress of doubled Pawns around your King, and the game would become unplayable. I never saw any detrimental effects of allowing Pawn-drop mates, though.
Thanks for answering! But what does 'drop move' mean? Is it moving as soon as you drop a piece?
H. G. Muller wrote on Sun, Feb 14, 2021 03:36 PM UTC in reply to Daphne Snowmoon from 01:36 PM:'Drop move' = dropping a piece from the hand on the board, as opposed to 'board move', where it was alreay on the board.
Can I ask one more question? Does Crazyhouse also have a Fifty-move rule(a draw if no piece is captured and no pawn moved during fifty move)? And is there a draw by Stalemate?
H. G. Muller wrote on Mon, Feb 15, 2021 12:16 PM UTC:I suppose there is a 50-move rule, because it doesn't seem to make sense to continue a game that has not been able to see any progress in 50 moves. And since it is based on orthodox Chess, one would not expect any needless alterations of the Chess rules.
Likewise, one would expect stalemate to be a draw. But of course stalamate is only a theoretical possibility. To run out of legal moves you should have almost no material left. Which here means the opponnet has nearly all the pieces. So he would have such an overwhelming advantage that he would have checkmated you long before you got anywhere near having so little material that stalemate becomes a possibility.
(That were two questions, BTW! ;-) )
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A rules question about Crazyhouse, for anyone who may know. Is it ever legal in a game for White to castle with a rook that has been dropped on a1 (or h1) after that particular rook has been moved or captured previously from/on that square? A similar question would also apply for Black, naturally. Also, I'm wondering how a rules enforcing preset for Crazyhouse would handle this, assuming it's been anticipated.
I think Greg once asked himself and a fellow Game Courier player why castling is illegal in Pocket Mutation Chess, and I suspect the answer lies in my first paragraph. Namely that it might be hard to keep track of whether certain rooks have been dropped back onto setup squares.
{edit: I suppose the same questions as above might apply to, at the least, bughouse as well. However, on the bughouse page it is explicitly noted that one can drop a rook on a setup square and still castle with it later, possibly. So, I suppose this applies to crazyhouse too - although I still wonder if the crazyhouse preset takes the possibility into account.]