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HAL CHESS - Mate in 4

HAL CHESS - Mate in 4

Posers and Puzzles

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The Title should be Mate in FIVE.
(unless one of you guys find one in four).

This position arose in a game of HAL CHESS.

In HAL CHESS there is glich in the program.

If you capture a piece on certain squares then that captured
piece re-appears once the capturing piece has moved.



Eg: Suppose one of the glich squares was e7

If the Knight on e7 had captured a Black Knight on e7 and
White played 1.Ng6+ Black could play 1...Nxg6.

Determine which square is the glich square. Determine what is
about to re-appear. White to play and Mate in 5. (very easy).

(Next Problem - How do you edit the title? There is a glich in my brain.)

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Does HAL CHESS recognize dead reckoning?

EDIT: I don't think it helps anyways

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as the position is legal for normal chess, the glitch square could be any of the squares, or indeed none of them? I've confused myself somehow, please help.

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There is only one glich square for it to work
and there is only one piece/pawn that can re-appear.
It's sound - White to play and mate in 5 (five).

If every square was a glich square the board would
be still be covered in pieces.

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Is the "glich square" h8?

1. Ng6+ Kg7
2. Rf8! Kh7
3. Ng3 Kg7
4. Nf5+ Kh7
5. Rh8 mate.

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Originally posted by greenpawn34
There is only one glich square for it to work
and there is only one piece/pawn that can re-appear.
It's sound - White to play and mate in 5 (five).

If every square was a glich square the board would
be still be covered in pieces.
Consider this game:

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bd7 6. Re1 c5



Only the Bishop reappears - not the Knight.

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Since you seem to like these weird(ish) forms of chess, perhaps you might like the idea of Chameleon chess I saw some kids playing a few weeks ago as well. What they did is when capturing a piece, the capturing piece got the abilities of the piece it captured as well - i.e. a Knight that takes a Bishop became a Knight-Bishop (the Bishop was added on the Knight's square) that could move like a Knight and like a Bishop. If this piece would capture another one, you can choose either to keep the Bishop-Knight or to add the strength of the newly captured piece in return for one of the strengths. i.e. when the Bishop-Knight would take a Rook-pawn, you can choose to keep the Bishop-Knight, change it to a Bishop-pawn, Bishop-Rook, Knight-pawn or Knight-Rook.



The abilities of the Bishop-Knight standing on d5.

The most insane thing I saw in these brief moments was a Black King-Bishop on g7 taking a pawn on b2. Black was mated shortly afterwards.

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Is the "glich square" h8?

No.

Clue:

In this game the glich square is h5.
The White King moves.
Something appears on h5 and moves.
White then mates 4 moves later.

It's sound.

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I see, but this should work too:

1. Ng6+ Kg7



2. Rf8! Kh7
3. Ng3 Kg7
4. Nf5+ Kh7
5. Rh8#

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The intended solution is
1. Kg6



1. ... h4
2. Nf2 h3
3. Ng4 h2
4. Ne5 h1=Q
5. Nf7#

(there are more routes for the Knight to reach f7, i.e. via 3. Ne4)

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Good - yes knew dual routes for Knight was there.

Might get to work on another with one sole solution.
Intersting idea though.

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I'm thinking the whole idea of HAL CHESS is flawed.

It's open to abuse.

Look at this very simple example in HAL CHESS.

White to play and win - the glich square is e8
When the White Knight moves a Black piece
( it cannot be a pawn) will re-appear on e8.

So what piece is under e8 and show the win.



Solution: There is a Black Knight under e8.

1.Nxg7+ Nxg7 2.h6 Kf7 3.h7! and wins.

Pretty good yes?

but infact all I have done is simply recreate a
famous study by Cheron (1895-1980) composed in 1952.

White: Ka1, Ne6. pawn h5
Black: Ke8, Nf5

White to play and win.

1.Ng7+ Nxg7 2.h6 Kf8 3.h7

(only one diagram per post - hence Edits)

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Are you sure that works (2)? 1. Nxg7+ Kf7! and the Knight is frozen on g7 (has to 'defend' the Rook) and 2. h6 Kg6 isn't much better either.

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Diagram correct now - can play good game of
blindfold chess - cannot do FEN without a board.

(never had to use it before - most edits were because
never knew only one diagram per post and was trying
to show 2 diagrams)

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Only e8 was the glich square not G7.

But you are correct - it's cooked.

1.Nxg7 Kf7! draw.

Back to the drawing board.