Happy Halloween!

This problem by Miguel Ambrona, 2024, has the following stipulation. We don't know which way round the board is, but we are told that one player retains castling right. Which side is White: the reds or the blues?

This problem gives an example of a so-called "chess vampire", i.e. a position where the mirror reflected position is illegal. So it is thematic for Halloween. See chess.stackexchange for more details, or Miguel's Halloween-themed app, where you too can play with chess vampires. He cautions that the deepest passageways of the dark vampire labyrinth are not yet fully mapped out.

Happy Halloween!

This problem by Miguel Ambrona, 2024, has the following stipulation. We don't know which way round the board is, but we are told that one player retains castling right. Which side is White: the reds or the blues?

This problem gives an example of a so-called "chess vampire", i.e. a position where the mirror reflected position is illegal. So it is thematic for Halloween. See chess.stackexchange for more details, or Miguel's Halloween-themed app, where you too can play with chess vampires. He cautions that he is only investigating one of the 16 vampire clans, and that moreover the deepest passageways of the dark vampire labyrinth are not yet fully mapped out. The puzzle above is from a different clan than the one featured in the game.

Happy Halloween!

This problem by Miguel Ambrona, 2024, has the following stipulation. We don't know which way round the board is, but we are told that one player retains castling right. Which side is White: the reds or the blues?

This problem gives an example of a so-called "chess vampire", i.e. a position where the mirror image is illegal. So it is thematic for Halloween. See chess.stackexchange for more details, or his Halloween-themed app, where you too can play with chess vampires.

Happy Halloween!

This problem by Miguel Ambrona, 2024, has the following stipulation. We don't know which way round the board is, but we are told that one player retains castling right. Which side is White: the reds or the blues?

This problem gives an example of a so-called "chess vampire", i.e. a position where the mirror reflected position is illegal. So it is thematic for Halloween. See chess.stackexchange for more details, or Miguel's Halloween-themed app, where you too can play with chess vampires. He cautions that the deepest passageways of the dark vampire labyrinth are not yet fully mapped out.