# White to move.......

skeeter
Posers and Puzzles 19 Jun '05 05:10
1. skeeter
515 + 30 days
19 Jun '05 05:101 edit
....and mate in two against any defence.

Came across some very old chess literature which contained these classic mate in two puzzles.

skeeter

fen string edit
2. BigDoggProblem
19 Jun '05 05:282 edits
Originally posted by skeeter
....and mate in two against any defence.

Came across some very old chess literature which contained these classic mate in two puzzles.

[fen]4K3/3Q4/8/p3k2N/r7/R2B4/5P2/7b w - - 0 1[/fen]

skeeter

fen string edit
1.Be4!! (2.Qd5# )

1...Bxe4 2.f4#
1...Rxe4 2.Rxa5#
1...Kxe4 2.Re3#
1...Rd4 2.Qe7#

Spiffy interference motif.

3. skeeter
515 + 30 days
19 Jun '05 05:31
Originally posted by BigDoggProblem
[b]1.Be4!! (2.Qd5# )

1...Bxe4 2.f4#
1...Rxe4 2.Rxa5#
1...Kxe4 2.Re3#
1...Rd4 2.Qe7#

Spiffy interference motif.

[/b]
Too good BigDogg. Give me a minute and I'll post another.

skeeter
4. skeeter
515 + 30 days
19 Jun '05 05:351 edit
Same again - white to move and mate in two:

skeeter

another fen edit
5. BigDoggProblem
19 Jun '05 05:49
Originally posted by skeeter
Same again - white to move and mate in two:

[fen]b4b2/3r4/3pr3/8/1K5N/2PR4/Q3p3/5kBR w - - 0 1[/fen]

Skeeter
1.Qa6 (2.Rd1# )

Unfortunately for Black, all of his checks cut off Ba8's attack on Rh1, allowing the Rh1/Bg1 battery to fire.

1...Rb7+ 2.Bb6#
1...d5+ 2.Bc5#
1...Re4+ 2.Bd4#

And finally
1...e1N/Q/R/B 2.Rf3#
1...Ke1 2.Qa1#

Tries: 1.Rd1+? exd1N! and 1.Qxa8? e1N!

6. skeeter
515 + 30 days
19 Jun '05 06:52
Yep. Correct. Next one:

skeeter
7. 19 Jun '05 07:002 edits
By the looks of it 1.Rcc7! (2.Nc3# )
1...Ne2 2.Qxh5#; 1...Nb5 (1...Rxa4) 2.Rc5# ; 1...Bxb3 2.Bxb3#; 1...Nc6 2.Rcd7#;
EDIT: missed this 1...Ne6 2.Rec7#; 1...Nf5 2.Re5 #
EDIT2: EDIT2: missed this variants
1...Nf3 2.Qe4 #; 1...Nc2 2.b4 #; 1...Nxb3 2.Qd3 #

8. skeeter
515 + 30 days
19 Jun '05 08:07
Yes. All the knight moves vacating d4 after the key Rc-c7 leads to a different mate. They do get harder.

skeeter
9. skeeter
515 + 30 days
19 Jun '05 08:14
....and yet another:

The perfect zugzwang position ?

skeeter
10. jfkjmh
nice one
19 Jun '05 09:10
Originally posted by skeeter
....and yet another:

[fen]8/qQ5p/3pN2K/3pp1R1/4k3/7N/1b1PP3/8[/fen]

The perfect zugzwang position ?

skeeter
1.Nd4 threatens 2.Rf5#
1. ...Kd4: Qb4#
1. ...ed: 2. Qd5:#
1. ...Qd4: 2.Qh7:
1. ...Bd4: 2.Qb1#
Sorry, couldn't find a Zugzwang here:'(
11. skeeter
515 + 30 days
19 Jun '05 09:192 edits
Nope . Sorry. ..Qxd4. Rf5 is not mate.

skeeter
12. 19 Jun '05 11:46
Originally posted by skeeter
....and yet another:

[fen]8/qQ5p/3pN2K/3pp1R1/4k3/7N/1b1PP3/8[/fen]

The perfect zugzwang position ?

skeeter
Very nice!

When black is on the move, 20 possibilities each leading to checkmate in 1.

When white is on the move, Nd4! creates another zugzwang position with checkmate in 1 after all black's moves.
13. 19 Jun '05 11:48
Originally posted by skeeter
Nope . Sorry. ..Qxd4. Rf5 is not mate.

skeeter
NO, but 1.Nd4 Qxd4 2.Qxh7#does
14. jfkjmh
nice one
19 Jun '05 12:43
Originally posted by Mephisto2
NO, but 1.Nd4 Qxd4 2.Qxh7#does
That's exactly what I said. I'm sure you read my post, skeeter.

I meant that after 1.Nd4 White threatens 2.Rg4#(not Rf5,sorry).

Zugzwang means, it's a problem that it's your turn, but since white threatens mate (Rg4ðŸ™„, after 1.Nd4 white wins regardless whose turn it is. Therefore, if it's white to move (as the thread title indicates) there is no zugzwang.
15. BigDoggProblem