"Forced" Forced Mates

twilight2007
Posers and Puzzles 05 Jun '07 02:06
1. 05 Jun '07 02:061 edit
In the rulebook, it shows that both players must make alternating moves. So my challenge is to create a position in which the player who has the move MUST make a move that leads to checkmate. I believe this is only possible for mates in 1, but I may be wrong. Here's an example (White to move):
2. 05 Jun '07 02:28
Maybe I'm not seeing what you are saying, but white has only 1 legal move, and that move happens to be checkmate. The King cannot move anywhere. The pawn above the king (h7) cannot move, and the pawn beside the king (g6) can only checkmate the black king.
3. 05 Jun '07 02:293 edits
I'll work on that. Meanwhile, how about a position in which there's only one move that doesn't lead to mate?

From Hoyle Majestic Chess (White to move):

Black

White
4. 05 Jun '07 02:35
Originally posted by typen
Maybe I'm not seeing what you are saying, but white has only [b]1 legal move, and that move happens to be checkmate. The King cannot move anywhere. The pawn above the king (h7) cannot move, and the pawn beside the king (g6) can only checkmate the black king.[/b]
What I'm saying is to create a position in which the only legal move(s) lead to checkmate. Therefore, a player MUST checkmate the other player in a position.
5. 05 Jun '07 02:464 edits
Here's one I just made where Black is forced to mate in two:

Black

White

EDIT: This one's flawed; still working.
6. SwissGambit
Caninus Interruptus
05 Jun '07 03:03
Originally posted by twilight2007
In the rulebook, it shows that both players must make alternating moves. So my challenge is to create a position in which the player who has the move MUST make a move that leads to checkmate. I believe this is only possible for mates in 1, but I may be wrong. Here's an example (White to move):
[fen]7k/7P/6PK/r7/8/8/8/8 b 50[/fen]
I've seen an example where White has no choice but to give mate in six (!) moves. I can't remember the exact position, but it's something like this:

A pacifist's #6
7. 05 Jun '07 04:033 edits
Here we go:

White to move, and White must mate within 4

White

Black
8. 05 Jun '07 04:34
Even better:

White to move and must mate in four moves:

Black

White
9. 05 Jun '07 06:471 edit
I looked to increase the number of pathways. White to play MUST mate in either 1 or 2, and there are five different mates:

10. 05 Jun '07 08:15
Originally posted by Jirakon
I'll work on that. Meanwhile, how about a position in which there's only one move that doesn't lead to mate?

From Hoyle Majestic Chess (White to move):

Black

[fen]B5KR/1r5B/6R1/2b1p1p1/2P1k1P1/1p2P2p/1P2P2P/3N1N2[/fen]

White
1.Rc6 Rxh7
11. 05 Jun '07 19:362 edits
Originally posted by Jirakon
I'll work on that. Meanwhile, how about a position in which there's only one move that doesn't lead to mate?

From Hoyle Majestic Chess (White to move):

Black

[fen]B5KR/1r5B/6R1/2b1p1p1/2P1k1P1/1p2P2p/1P2P2P/3N1N2[/fen]

White
12. SwissGambit
Caninus Interruptus
05 Jun '07 19:441 edit
Originally posted by EinsteinMind

Edit: Looks like you just did. ðŸ˜‰
13. 05 Jun '07 21:152 edits
Originally posted by SwissGambit

Edit: Looks like you just did. ðŸ˜‰
sorry. I posted something then I saw you were defining it differently then I was looking to see how i could fulfill the boundaries you gave and I was about to suggest another move when I saw that It was wrong.

I'll admit i'm crappy on these sorts of puzzles...

maybe I should stay out of these.
14. 06 Jun '07 10:22
Originally posted by EinsteinMind
sorry. I posted something then I saw you were defining it differently then I was looking to see how i could fulfill the boundaries you gave and I was about to suggest another move when I saw that It was wrong.

I'll admit i'm crappy on these sorts of puzzles...

maybe I should stay out of these.
No, if you're crappy at them, then you have to do them even more, to gain some skill. Solving puzzles develops your tactical vision, thus helps you on your playing.
15. 06 Jun '07 11:021 edit
http://www.xs4all.nl/~timkr/chess2/diary_14.htm
Item 267

http://www.xs4all.nl/~timkr/chess2/diary_7.htm
Item 130