Jaydon

These types of puzzles are quite difficult! Anyone else think they have the answer? I was thinking along the same lines as GM AO

Brokenwall

Well, bcoz nobody post the answer, below I give the solution.

BROKENKEY

1.Bf7 Rg6
2.Rxg6 Kb1
3.Rg1#

variant
1.Bf7 Rb1
2.Bxb1 Kxb1
3.Qg1#

Just2Good

I posted an answer that was almost correct! Also, your answer doesn't show us what happens after 1. Bf7 Rf6!

Attached Files

Your browser is completely ignoring the <APPLET> tag!

__________________
.
"The fox knows many things, but the hedgehog knows one big thing."

~ Isaiah Berlin ~

Brokenwall

other variants

1.Bf7 any (except Rxg6 or Rb1)
2.Qg1+ ...
Black cant prevent mate in next move.

Btw ur answer is not 'almost correct' one.

1.Bb5 Rf6
if white moves 2.c4 it will be a stalemate.

Just2Good

That is unfair. It says mate in 3, not mate in 2.

1. Bf7 Rf6
2.Qg1+ checkmate is a mate in 2.

__________________
.
"The fox knows many things, but the hedgehog knows one big thing."

~ Isaiah Berlin ~

Brokenwall

It is mate in 3 problem

Chess problem - Wikipedia, the free encyclopedia

Directmates: white to move first and checkmate black within a specified number of moves against any defence. These are often referred to as "mate in n", where n is the number of moves within which mate must be delivered. In composing and solving competitions, directmates are further broken down into three classes:
Two-movers: white to move and checkmate black in two moves against any defence.
Three-movers: white to move and checkmate black in no more than three moves against any defence.
More-movers: white to move and checkmate black in n moves against any defence, where n is some particular number greater than three.

In mate in 3 or movers problems, it is not neccessary to mate exactly in 3 or N moves, it might be shorter if Black don't play their best move. That's why Black should play best move to prevent shorter mate.

OK I will give another examples of Matheson's post. Please See Chess Puzzles for the Distinguished Gentlemen! page 13-14. And btw it was your answer too Mr. AO.

By Matheson
Hard Puzzle
Here is a quite hard, though not impossible puzzle. White to play and mate in 4.



Your accepted solution as follow:
1. Nb6 - the Queen must take because Ka7 allows this variation
2. Nc8+ Ka8
3. Qa7+ Rxa7
4. Rxa7#

variants
1. Nb6+ Qxb6
2. Qxb6 Bd5
3. Bxd5 Bc5 (or 3...Rxa5 or 3...Rc8)
4. Rxa6# (or Qxa5# or Qxb7#)

But White can't win in exactly in 4 moves if Black plays like this
1. Nb6+ Qxb6
2. Qxb6 Rxa5
3. Qxa5#

(White must play Qxa5# to force shorter mate (3 moves) or no mate here).

Thanks

Dulce

Man, i finding these to be incredibly tough. One of these days i WILL get one, but hopefully im improving my game until then.

Jaz

Indeed, they are definatley not very easy. I'm wondering who compiles these puzzles and how or do they emerge out of real gameplay. Brokenwall you are not compiling them by yourself are you?

Just2Good

I enjoy them because they are so tough! Brokenwall, would you like me to give you a puzzle now?

__________________
.
"The fox knows many things, but the hedgehog knows one big thing."

~ Isaiah Berlin ~

Calvin

There were a million mates in 2 in your puzzle. I was trying to find the mate in 3

Brokenwall

Mate in 3 means white to play n checkmate black in NO MORE THAN 3 moves against any defences. Please notice it doesn't say ".. checkmate black in EXACTLY 3 MOVES..".
So not all variants must have 3 moves exactly.

Solution 1.Bf7 ...
And all variants here couldn't stop mate in no more than 3 moves.

Cephus

Qhe5 also works, there is now way to stop a mate in less than 3 moves.

Brokenwall

Mmm Mr.Cephus

1.Qhe5 Rb1
any variants dont bring a mate in 3 here.

Trust me, all these broken puzzles have only 1 solution (correct 1st move).