Helpmate in 4 + set play

David113
Posers and Puzzles 21 May '08 00:39
1. 21 May '08 00:39

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.
2. SwissGambit
Caninus Interruptus
21 May '08 16:58
Originally posted by David113
[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...Rf4 2.Ke2 Rf5 3.Ke3 Re5+ 4.Kf4 Re4
1.Bf4 Re5 2.Bd2 Rf5 3.Ke2 Rf4 4.Ke3 Re4

wR rundlauf both clockwise and counter-clockwise. Nice.
3. 21 May '08 17:521 edit
Originally posted by SwissGambit
1...Rf4 2.Ke2 Rf5 3.Ke3 Re5+ 4.Kf4 Re4
1.Bf4 Re5 2.Bd2 Rf5 3.Ke2 Rf4 4.Ke3 Re4

wR rundlauf both clockwise and counter-clockwise. Nice.
SOLV'D (crazyblue, heinzkat, SwissGambit)

and both rundlaufs are without captures!
4. 21 May '08 18:10
The only 'Rundlauf' or ... switchback (?) I knew is this one:

Theodor Nissl 1910

White to move, mate in six.

Any more examples? I like the theme.
5. SwissGambit
Caninus Interruptus
21 May '08 18:36
Originally posted by heinzkat
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.
1.Bh4 Rd1 2.Bg3 Rc1 3.Bf4 Rc2 4.Bg5! R~ 5.Bd8 or Bd2+ mates.

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.
6. 21 May '08 22:382 edits
Originally posted by heinzkat
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.
Here are a few Mate-in-4-miniature-rundlaufs for you.

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 SwissGambitðŸ˜‰

Itamar Faybish / Göran Wicklund / François Labelle & Alexandre Leroux

Proof game in 13.5 moves.
7. 21 May '08 23:01
I solved it as well, but when I got back online to send you the message, the solution was already posted. Oh well.
8. 21 May '08 23:02
Originally posted by David113
Here are a few Mate-in-4-miniature-rundlaufs for you.

Ralf Kraetschmer
White: Ka4, Rc7, Bb5, Nd7; Black: Ka8, Na7, Ne3.

M. Havel
White: Ka1, b6, Nb1; Black: Ka4, Pa6.

C. G. S. Narayanan
White: Kg3, Qh1; Black: Kg5, Pf6, Pg4, Pg6.
Thank you.