Originally posted by David1131...Rf4 2.Ke2 Rf5 3.Ke3 Re5+ 4.Kf4 Re4
[fen]8/4p3/3pP3/3P2p1/3PR1P1/3P1pb1/2P2p2/5k1K b[/fen]
You have two problems to solve here.
a. In the given position WHITE starts, the players cooperate, White's 4th move is mate.
b. In the given position BLACK starts, the players cooperate, White's 4th move is mate.
1.Bf4 Re5 2.Bd2 Rf5 3.Ke2 Rf4 4.Ke3 Re4
wR rundlauf both clockwise and counter-clockwise. Nice.
Originally posted by heinzkat1.Bh4 Rd1 2.Bg3 Rc1 3.Bf4 Rc2 4.Bg5! R~ 5.Bd8 or Bd2+ mates.
The only 'Rundlauf' or ... switchback (?) I knew is this one:
Theodor Nissl 1910
[fen]8/KR6/8/k5B1/3r2b1/1P6/8/8 w[/fen]
White to move, mate in six.
Any more examples? I like the theme.
The main difference between a rundlauf and a switchback is that a rundlauf requires a piece to visit at least two 'other' squares before returning to the original square. If it only visits one 'other' square, it's a switchback.
2 edits
Originally posted by heinzkatHere are a few Mate-in-4-miniature-rundlaufs for you.
The only 'Rundlauf' or ... switchback (?) I knew is this one:
Theodor Nissl 1910
[fen]8/KR6/8/k5B1/3r2b1/1P6/8/8[/fen]
White to move, mate in six.
Any more examples? I like the theme.
Ralf Kraetschmer
White: Ka4, Rc7, Bb5, Nd7; Black: Ka8, Na7, Ne3.
M. Havel
White: Ka1, Rb6, Nb1; Black: Ka4, Pa6.
C. G. S. Narayanan
White: Kg3, Qh1; Black: Kg5, Pf6, Pg4, Pg6.
And one final rundlauf dedicated to SwissGambit😉
Itamar Faybish / Göran Wicklund / François Labelle & Alexandre Leroux
Proof game in 13.5 moves.