You are looking for: AAI08
Joaquim Crusats (Spain) Original 28-Dec-2024
(21+0) Colour the pieces to prove that, at some point during the game, both sides had the same number of units on the board (< 16).
Walther von Holzhausen (Germany)
Werner Speckmann (Germany) Das logische Schachproblem 1965
WFvH version WS
(5+6) #3
Walther von Holzhausen (Germany)
Werner Speckmann (Germany) Das Logische Schachproblem 1965
WFvH version WS
(7+6) #3
François Labelle (Canada) Retro Mailing List, 2005
Prove that there exists a natural number, N, such that there is no pair (P(N),k)N)) where: (a) P is a legal chess position, (b) k is a natural number, (c) P can be reached from G in exactly k single moves in exactly N ways.
Elliot Glazer (USA)
Andrew Buchanan (SIngapore) Original 28-Dec-2024
Prove that for any natural, N, there exists a triple (A(N), B(N), k(N)) where: (a) A & B are legal chess positions, (b) k is a natural number, (c) B can be reached from A in exactly single k moves in exactly N ways.
Dmitrij Baibikov (Israel) Original 28-Dec-2024
(3+13) a) Last 63 single moves? b) Which King visited squares a2, b6, f2, g6? Start position: Ps instead of Bs and Ss Contra Parrain Circe Grasshoppers e1c4g6, Locusts f1b8,<br> Dabbaba e7, (0,6)-Leaper h1, Ubi-Ubi d7
Ofer Comay (Israel)
Andrew Buchanan (Singapore) Original 28-Dec-2024
(14+15) PG in 15.0 How many solutions?
Andriy Frolkin (Ukraine)
Andrew Buchanan (Singapore) Original 28-Dec-2024
(15+1) Last 6 single moves?
Miguel Ambrona (Spain) Original 31-Dec-2024
dedicated to all chess vampires
(16+16) PG in 5.0 How many solutions?
Andriy Frolkin (Ukraine)
Jeff Coakley (Canada) Original 31-Dec-2024
BEAM
(6+4) Each letter represents a different type of piece. Uppercase is one colour, lowercase is the other. Determine the position and the last move.