"Forced" Forced Mates

Originally posted by David113
http://www.xs4all.nl/~timkr/chess2/diary_14.htm
Item 267

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

Thanks for the link. The #6 remains my favorite of the problems. It's economical and elegant, while the Elkies problems are brutal and heavy-handed (a necessary price to pay if one wants to extend the length.)

I was just trying a bit to create a forced mate with as many moves as possible. Somehow I ended up with something different. But it's kinda funny, so I thought I should post it.

a) Diagramm. White to move and mate in 14
b) White Pawn on c2 instead of c3. White to move and mate in 16.

Originally posted by crazyblue
I was just trying a bit to create a forced mate with as many moves as possible. Somehow I ended up with something different. But it's kinda funny, so I thought I should post it.

a) Diagramm. White to move and mate in 14
b) White Pawn on c2 instead of c3. White to move and mate in 16.

[fen]8/1pBp1p2/1P1P4/5P2/2P5/2P1p1p1/pp1pP1P1/qk1K1B2 w - - 0 1[/fen]

I think I've got a):

1. c5 f6 2. c6 bxc6

2... dxc6 3. d7 c5 4. d8=Q c4 5. Be5 fxe5 6. Qe8 e4 7.
Qxe4#

3. b7 c5 4. b8=N c4 5. Nc6 dxc6 6. d7 c5 7. Be5 fxe5 8. d8=Q e4 9. Qd3+
cxd3

9... exd3 10. exd3 e2+ 11. Bxe2 cxd3 12. Bxd3#

10. exd3 e2+

10... c4
11. dxc4 e2+ 12. Bxe2 e3 13. Bd3#

11. Bxe2 e3 12. f6 c4 13. f7 cxd3 14. Bxd3#

Yep, looks good 🙂
Now try the other. It works in 16.

Originally posted by crazyblue
I was just trying a bit to create a forced mate with as many moves as possible. Somehow I ended up with something different. But it's kinda funny, so I thought I should post it.

a) Diagramm. White to move and mate in 14
b) White Pawn on c2 instead of c3. White to move and mate in 16.

[fen]8/1pBp1p2/1P1P4/5P2/2P5/2P1p1p1/pp1pP1P1/qk1K1B2 w - - 0 1[/fen]

Edit (stupid answer that needed removed....)

Originally posted by crazyblue
Yep, looks good 🙂
Now try the other. It works in 16.

b) is tough. Haven't found any promising ideas yet.