Thanks for your review, Greg. You have understood the design perfectly, and I would be delighted if you added Two Move Chess to ChessV!
After some thought, I see that the rule for three-fold repetition should be handled differently than the 50 move and 75 move rules. Let's take them one at a time.
For threefold repetition, let's consider the game to be a sequence of board positions. A two move turn results in two positions, while single move and response move turns result in only one. It doesn't matter what type of move produced each position--a player may claim a draw by threefold repetition simply by noting that a certain position has been reached for a third time (with the usual considerations of whose turn it is, what castling rights exist, etc.).
For the 50 move and 75 move rules, I think the simplest resolution would be to change them to a 50 turn rule and a 75 turn rule in Two Move Chess, with the reminder that a turn and a move are not equivalent.
I am open to other proposals, for example these rules could be replaced by a "25 turn rule" and a "38 turn rule", but I am inclined to think that would introduce unnecessary confusion.
Thanks for your review, Greg. You have understood the design perfectly, and I would be delighted if you added Two Move Chess to ChessV!
After some thought, I see that the rule for three-fold repetition should be handled differently than the 50 move and 75 move rules. Let's take them one at a time.
For threefold repetition, let's consider the game to be a sequence of board positions. A two move turn results in two positions, while single move and response move turns result in only one. It doesn't matter what type of move produced each position--a player may claim a draw by threefold repetition simply by noting that a certain position has been reached for a third time (with the usual considerations of whose turn it is, what castling rights exist, etc.).
For the 50 move and 75 move rules, I think the simplest resolution would be to change them to a 50 turn rule and a 75 turn rule in Two Move Chess, with the reminder that a turn and a move are not equivalent.
I am open to other proposals, for example these rules could be replaced by a "25 turn rule" and a "38 turn rule", but I am inclined to think that would introduce unnecessary confusion.