Good puzzle for... well a 1 in a million ending!

Good puzzle for... well a 1 in a million ending!

Posers and Puzzles

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M

Joined
30 May 05
Moves
2444
19 Jul 05
2 edits

Secret RHP coder

on the payroll

Joined
26 Nov 04
Moves
155080
19 Jul 05

Originally posted by MikeXx2020
[fen]B111K11N/8/8/8/8/8/8/k7[/fen]
A known theoretical win for White. Next!

M

Joined
30 May 05
Moves
2444
19 Jul 05

X
Cancerous Bus Crash

p^2.sin(phi)

Joined
06 Sep 04
Moves
25076
19 Jul 05


This one is better.


Your one is only mate in 30.

M

Joined
12 Mar 03
Moves
44411
19 Jul 05

Originally posted by XanthosNZ
[fen]7K/4B3/4k3/8/8/8/8/2N5 w - - 0 1[/fen]
This one is better.


Your one is only mate in 30.
why better? Just get the bishop out of the way, and with perhaps a few moves more we have the same. Is more moves = better?

Ah yes, with black to play I think it's a draw 😉

s

Joined
12 Feb 05
Moves
47202
19 Jul 05
1 edit



How about this one?

M

Joined
12 Mar 03
Moves
44411
19 Jul 05

Originally posted by schakuhr
[fen]K7/Q7/8/8/3rk3/8/8/8 - - 1 1[/fen]

How about this one?
Assuming white has the move (otherwise Rd8+ draws) it is a standard win for white. I would start with Qf7 or Qe7 to 'split' the board for the black king in 2, reducing the options. But I am sure there are many good first moves.

T

Joined
29 Feb 04
Moves
22
19 Jul 05
1 edit

Originally posted by Mephisto2
why better? Just get the bishop out of the way, and with perhaps a few moves more we have the same. Is more moves = better?
I think he means that, requiring 33 moves, this is the longest shortest mate with B+N+K vs. K

Only 99.51% of these positions are won with White to move.
Can you construct a drawn position with White to move?

T

Joined
29 Feb 04
Moves
22
19 Jul 05

Originally posted by Mephisto2
Assuming white has the move (otherwise Rd8+ draws) it is a standard win for white. I would start with Qf7 or Qe7 to 'split' the board for the black king in 2, reducing the options. But I am sure there are many good first moves.
White should play Qe7+, Qh7+, Qf7, or Qa2, mating in 33 moves. All other moves are inferior.

But this position is not the longest shortest mate with K+Q vs. K+R.

M

Joined
12 Mar 03
Moves
44411
19 Jul 05

Originally posted by THUDandBLUNDER
White should play Qe7+, Qh7+, Qf7, or Qa2, mating in 33 moves. All other moves are inferior.

But this position is not the longest shortest mate with K+Q vs. K+R.
That is possible. Only, the technique I use is based on a) limiting the playground for the king, b) driving king and rook apart, c) forcing the king to the rim and towards a corner and finally d) using mating threads, provoke forkings and win the rook. It may not lead to the fastes way in all positions, but will not be off by more than 5 moves, safely within the 50.

T

Joined
29 Feb 04
Moves
22
19 Jul 05
1 edit

Originally posted by Mephisto2
That is possible. Only, the technique I use is based on a) limiting the playground for the king, b) driving king and rook apart, c) forcing the king to the rim and towards a corner and finally d) using mating threads, provoke forkings and ...[text shortened]... s, but will not be off by more than 5 moves, safely within the 50.
I was referring to the position, not your peerless technique. 😉

F

Joined
24 May 05
Moves
1958
19 Jul 05
1 edit

Originally posted by THUDandBLUNDER
I think he means that, requiring 33 moves, this is the longest shortest mate with B+N+K vs. K

Only 99.51% of these positions are won with White to move.
Can you construct a drawn position with White to move?

M

Joined
30 May 05
Moves
2444
19 Jul 05

T

Joined
29 Feb 04
Moves
22
19 Jul 05

Originally posted by MikeXx2020
[fen]111NkB11/8/8/8/8/8/8/K7[/fen]
Smartass.

M

Joined
30 May 05
Moves
2444
19 Jul 05