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Chess

cinelli
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Chess

#508906

Postby cinelli » June 22nd, 2022, 9:00 pm

Image

In this chess puzzle black’s king is surrounded and black’s only moves are b6 and g5. Can you find white’s sequence to mate in four moves?

Cinelli

GrahamPlatt
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Re: Chess

#508908

Postby GrahamPlatt » June 22nd, 2022, 9:18 pm

There seems to be a mate in one - nd3. So if you want to prolong the agony, just keep moving the king back and let that b pawn advance…
Oops, edit: playing in the wrong direction! Plainly nd3 and kxb. Sorry.

Nd3… kxb
Nd3-f2 ..pb6,
(If kg3, qg1 mate)
qh1 kg3
qh2 mate

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Re: Chess

#508913

Postby GrahamPlatt » June 22nd, 2022, 9:50 pm

No. That does NOT work. N-f2 & pxn… damn. Oh, just ignore me!

GrahamPlatt
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Re: Chess

#508915

Postby GrahamPlatt » June 22nd, 2022, 9:54 pm

OK

Rc7 .. then a black pawn moves
Rc1 .. the other pawn moves.
Nd3.. kxb
Qg1 mate.

9873210
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Re: Chess

#509051

Postby 9873210 » June 23rd, 2022, 2:23 pm

GrahamPlatt wrote:OK

Rc7 .. then a black pawn moves
Rc1 .. the other pawn moves.
Nd3.. kxb
Qg1 mate.

... Kh3

mc2fool
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Re: Chess

#509060

Postby mc2fool » June 23rd, 2022, 3:12 pm


GrahamPlatt
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Re: Chess

#509077

Postby GrahamPlatt » June 23rd, 2022, 5:08 pm

9873210 wrote:
GrahamPlatt wrote:OK

Rc7 .. then a black pawn moves
Rc1 .. the other pawn moves.
Nd3.. kxb
Qg1 mate.

... Kh3


Bugger. I did say ignore me!

UncleEbenezer
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Re: Chess

#509083

Postby UncleEbenezer » June 23rd, 2022, 5:49 pm

GrahamPlatt wrote:
Bugger. I did say ignore me!


Did someone say something?

Couple of things to bear in mind with these problems:
  1. It ain't chess as in a game, it's chess as in a diabolical problem space.
  2. there's a gotcha (preferably several) with any obvious solution or promising line.

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Re: Chess

#509097

Postby CryptoPlankton » June 23rd, 2022, 7:23 pm

From past experience of these, this doesn't feel right (doesn't use the rook) - so please point out why!

Spoiler:

1. Kb6 g5
2. Nd3 Kxg2
3. N(d3)f2 Kg3
4. Qg1#

9873210
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Re: Chess

#509101

Postby 9873210 » June 23rd, 2022, 8:04 pm

CryptoPlankton wrote:From past experience of these, this doesn't feel right (doesn't use the rook) - so please point out why!

Spoiler:

1. Kb6 g5
2. Nd3 Kxg2
3. N(d3)f2 Kg3
4. Qg1#



3 ... P(e3)xN(f2)


now what?

perhaps:

If this were chess there is a mate in 6 with the queen taking all the e,f, and g pawns ending on e3 mate.
1. Qa1 g5 (or b6)
2. Qxe5 b6
3. Ka6 b5
4. Qxg5 b4
5. Qxf4 b3
6. Qxe3 mate

Which suggests:
1. Qd8 g5 (or b6)
2. Rd7 b6
3. Rd2 p(e3)xR(d2)
4. Qd4 mate

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Re: Chess

#509106

Postby CryptoPlankton » June 23rd, 2022, 8:27 pm

9873210 wrote:
CryptoPlankton wrote:From past experience of these, this doesn't feel right (doesn't use the rook) - so please point out why!

Spoiler:

1. Kb6 g5
2. Nd3 Kxg2
3. N(d3)f2 Kg3
4. Qg1#



3 ... P(e3)xN(f2)


now what?

perhaps:

If this were chess there is a mate in 6 with the queen taking all the e,f, and g pawns ending on e3 mate.
1. Qa1 g5 (or b6)
2. Qxe5 b6
3. Ka6 b5
4. Qxg5 b4
5. Qxf4 b3
6. Qxe3 mate

Which suggests:
1. Qd8 g5 (or b6)
2. Rd7 b6
3. Rd2 p(e3)xR(d2)
4. Qd4 mate

Thank you! Not sure what all the "mate in six" preamble was about, but I like the solution.

I'll blame COVID (fifth day) this time!

CP

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Re: Chess

#509110

Postby 9873210 » June 23rd, 2022, 8:39 pm

CryptoPlankton wrote:
9873210 wrote:
CryptoPlankton wrote:From past experience of these, this doesn't feel right (doesn't use the rook) - so please point out why!

Spoiler:

1. Kb6 g5
2. Nd3 Kxg2
3. N(d3)f2 Kg3
4. Qg1#



3 ... P(e3)xN(f2)


now what?

perhaps:

If this were chess there is a mate in 6 with the queen taking all the e,f, and g pawns ending on e3 mate.
1. Qa1 g5 (or b6)
2. Qxe5 b6
3. Ka6 b5
4. Qxg5 b4
5. Qxf4 b3
6. Qxe3 mate

Which suggests:
1. Qd8 g5 (or b6)
2. Rd7 b6
3. Rd2 p(e3)xR(d2)
4. Qd4 mate

Thank you! Not sure what all the "mate in six" preamble was about, but I like the solution.

I'll blame COVID (fifth day) this time!

CP


It's how I would play this position in a real game, particularly if I had time trouble. When I wrote that I did not have the answer. The mate in 6 showed me how to use the queen and I stumbled into the mate in 4. Some people may be interested in the thought process rather than just the answer.

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Re: Chess

#509112

Postby mc2fool » June 23rd, 2022, 8:50 pm

9873210 wrote:
Which suggests:
1. Qd8 g5 (or b6)
2. Rd7 b6
3. Rd2 p(e3)xR(d2)
4. Qd4 mate

Close, but 4. Qd4 e5xQ ! :D

9873210
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Re: Chess

#509113

Postby 9873210 » June 23rd, 2022, 9:05 pm

mc2fool wrote:
9873210 wrote:
Which suggests:
1. Qd8 g5 (or b6)
2. Rd7 b6
3. Rd2 p(e3)xR(d2)
4. Qd4 mate

Close, but 4. Qd4 e5xQ ! :D

Rats, 4. Qxb6 mate mate in 6 was so much easier.

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Re: Chess

#509123

Postby GoSeigen » June 23rd, 2022, 10:38 pm

Simplistic, but does this work?

Spoiler:

1. Rc7 ...
2. Rc1 ...
3. Nd3+ KxB
4. Qg1 mate


GS

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Re: Chess

#509129

Postby mc2fool » June 23rd, 2022, 11:05 pm

GoSeigen wrote:Simplistic, but does this work?

Spoiler:

1. Rc7 ...
2. Rc1 ...
3. Nd3+ KxB
4. Qg1 mate


GS

Nope. 4. Qg1 Kxh3 :D

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Re: Chess

#509137

Postby GoSeigen » June 24th, 2022, 6:26 am

mc2fool wrote:
GoSeigen wrote:Simplistic, but does this work?

Spoiler:

1. Rc7 ...
2. Rc1 ...
3. Nd3+ KxB
4. Qg1 mate


GS

Nope. 4. Qg1 Kxh3 :D


Aargh. Cunning puzzle.

GS

cinelli
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Re: Chess

#509378

Postby cinelli » June 24th, 2022, 8:29 pm

The solution:

The prize goes to 9873210 for the correct solution:

1 Qd8! b6 or g5
2 Rd7! g5 or b6
3 Rd2! exd2
4 Qxb6 mate

I think the rook sacrifice is brilliant as it not only gives black a move, it also frees the diagonal from b3 to the king. This is a problem by Fritz Giegold.


Cinelli


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