After a capture, the captured piece is reborn only after another piece of its own side has moved. The line between capturing square and rebirth square is parallel with and of same direction and length as the move of this other piece. Pawns can be reborn on 1st and 8th rank. From their own base rank, they may move one-step; if reborn on the promotion rank, the Pawn at once promotes, the promotion piece being determined by the Pawn side.
[ENG] After a capture, the captured piece is reborn only after another piece of its own side has moved. The line between capturing square and rebirth square is parallel with and of same direction and length as the move of this other piece. Pawns can be reborn on 1st and 8th rank. From their own base rank, they may move one-step; if reborn on the promotion rank, the Pawn at once promotes, the promotion piece being determined by the Pawn side.
Point Reflection:
Two units standing on squares symmetric with respect to the centre of the board (e.g. c2 and f7, one square being the ‘reflection’ of the other) exchange their powers of movement. Only a non-reflected King and Rook can castle, and only non-reflected pawns can capture e.p.
For the animation purposes the initial game array position is shown on the diagram. The task is to find the final positions (adding pieces to the empty board) for two solutions. The animation of the solutions can show you what are the final positions and how to get them.
No. 1603 Pierre Tritten
France
original - 13.04.2021
white Bf1c1 Ke1 Qd1 Ph2g2f2e2d2c2b2a2 Sg1b1 Rh1a1
black Bf8c8 Ke8 Qd8 Ph7g7f7e7d7c7b7a7 Sg8b8 Rh8a8
PG 3,5 2 solutions X+Y
Add pieces (ending with triple check mate)
Circe Parrain
Point Reflection
A battery check, plus two checks from a PointReflection move. The wK attacks as Q, the wP attacks as K, the wS attacks normally, and the bK is mated because it moves as P. It is strange that in proof games with PointReflection, all units start by moving normally except for the K and Q!
Thomas Maeder
April 14, 2021 10:23
I suspect that this might be interesting if I understood it.
How can this be a proof game in >0 moves if the diagram position is the game array?
What’s the meaning of “Add pieces (ending with triple check mate)”
Sorry, as I wrote above the problem and in the post announcing the problem, it had to be empty diagram to add pieces on, but I couldn’t make the animation if having empty board (I couldn’t move not existing pieces). So, for now, either the game array and the animation or empty board and the solutions without animation. (a question to Dmitri Turevski: if I could do it anyhow better?).
Imagine an empty board, put final positions (add the pieces) with the triple check mate achievable in 3.5 moves. Then compare with final positions of the animated solutions.
A great find! Keep them coming, Pierre!
A battery check, plus two checks from a PointReflection move. The wK attacks as Q, the wP attacks as K, the wS attacks normally, and the bK is mated because it moves as P. It is strange that in proof games with PointReflection, all units start by moving normally except for the K and Q!
I suspect that this might be interesting if I understood it.
How can this be a proof game in >0 moves if the diagram position is the game array?
What’s the meaning of “Add pieces (ending with triple check mate)”
Sorry, as I wrote above the problem and in the post announcing the problem, it had to be empty diagram to add pieces on, but I couldn’t make the animation if having empty board (I couldn’t move not existing pieces). So, for now, either the game array and the animation or empty board and the solutions without animation. (a question to Dmitri Turevski: if I could do it anyhow better?).
Imagine an empty board, put final positions (add the pieces) with the triple check mate achievable in 3.5 moves. Then compare with final positions of the animated solutions.
Thanks, Julia!