# Chess problem 3 by Christoph Bandelow

I thank Christoph Bandelow for allowing this chess problem, with a mathematical flavor, to be posted here.

Position:

• In algebraic:White: King c7, Rooks c3 and d3, Knights b1 and e1,
Pawn e3 (6 pieces).Black: King b5, Knight a4 and c4, Knights
a4 and c4, Pawns a7, b6, and a5 (7 pieces).
• In Forsyth notation:
```8
p1K5
rp6
pk6
n1n5
2RRP3
8
1N2N3
```

From the chess problem collection “Problem-Juwelen” by Herbert Grasemann. Publisher: Siegfried Engelhardt Verlag, Berlin 1964.

White to mate in 6 (Christoph Bandelow, 1959)

Solution: 1. Rb3+ … 2. Rb5+ … 3. Rb3+ … 4. Rb5+ … 5. Nd3

This problem was originally posted at http://www.permutationpuzzles.org/chess/bandelow3.html.

# Chess problem 2 by Christoph Bandelow

I thank Christoph Bandelow for allowing this chess problem, with a mathematical flavor, to be posted here.

Position:

• In algebraic:White: King b4, Rooks b2 and e1, Bishop a1, Knight d4, Pawns c5, g3, g4
(8 pieces).Black: King c1, Rook h1, Bishop d1, Knights d2 and g1, Pawns c6, d5,
e2, g5, h2 (10 pieces).
• In Forsyth notation:
```8
8
2p5
2Pp2p1
1K1N2P1
6P1
1R1np2p
B1kbR1nr
```

From the chess problem collection “Problem-Juwelen” by Herbert Grasemann. Publisher: Siegfried Engelhardt Verlag, Berlin 1964.

White to mate in 8 (Christoph Bandelow, 1958)

Solution: 1. Kc3 Ne4+ 2. Kd3 Nf2+ 3. Ke3 Nxg4+ 4. Kd3 Nf2+ 5. Kc3 Ne4+ 6. Kb4 Nd2 7. g4

This problem was originally posted at http://www.permutationpuzzles.org/chess/bandelow2.html.

# Chess problem 1 by Christoph Bandelow

I thank Christoph Bandelow for allowing this chess problem, with a mathematical flavor, to be posted here.

Position:

• In algebraic:White: King g8, Queen e2, Bishops a1 and g4, Pawn e6 (5 pieces),Black: King f6, Bishop a2, Knight b1 (3 pieces).
• In Forsyth notation:
```6K1
8
4Pk2
8
6B1
8
b3Q3
Bn6```

What were the last 6 single moves? (retrochess problem by Christoph Bandelow)

Solution: -1. d5xe6 e.p.+ -2. ….. e7-e5 -3. d4-d5+ -4. ….. Ke6xPf6+ -5. e5xf6 e.p.++ -6. ….. f7-f5