15 Apr 08
Originally posted by SwissGambit1. Qh1! [White threatens 2. f3+ Ndxf3,Ngxf3 3. Qb1+,Qh7+ Kxe3 4. Qd3#. The thematic defenses are 1. ... Rb5 and 1. ... Bb5. This is a pair of self-obstructions, which allow White to create from scratch one of the two Bristols. After 1. ... Rb5 2. Rg1+! Ndf3 3. Ra1!! and 4. Qb1# because Black can not defend with 3. ... Bb5. After 1. ... Bb5 2. Rh2+! Ngf3 3. Rh8!! and 4. Qh7# because now Black does not have 3. ... Rb5.]
[fen]3bK3/1r1pp3/2bp4/6n1/3PkN2/1pP1N1P1/3n1PR1/Q7 w[/fen]
Mate in 4
1. ... Bc7 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote]
1. ... Bb6 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote]
1. ... Ba5 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote][/quote]
1. ... Ra7 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote][/quote]
1. ... Rb8 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote][/quote]
1. ... Rc7 2. f3+
[quote]2. ... Ngxf3 3. Re2 with 4. Qh7#
2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote][/quote]
1. ... Rc7 2. Rh2+[/quote][/quote][/quote]
[quote]2. ... Ngf3 3. Rh8 with 4. Qh7#
1. ... Rb6 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote][/quote]
1. ... Rb5 2. Rg1+
[quote]2. ... Ngf3 3. Qh7+
[quote]3. ... Rf5 4. Qxf5#
2. ... Ndf3 3. Ra1 with 4. Qb1#[/quote][/quote][/quote][/quote]
1. ... Rb4 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote][/quote]
1. ... e6 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote][/quote]
1. ... e5 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
[quote]3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote][/quote]
1. ... Bd5 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Nfxd5, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Nfxd5, Re2, Qd3#[/quote][/quote][/quote]
1. ... Bb5 2. Rh2+[/quote][/quote][/quote]
[quote]2. ... Ngf3 3. Rh8 with 4. Qh7#
2. ... Ndf3 3. Qb1+
[quote]3. ... Bd3 4. Qxd3#
1. ... Ba4 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Nfd5, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Nfd5, Re2, Qd3#[/quote][/quote][/quote]
1. ... d5 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote][/quote]
1. ... b2 2. f3+
[quote]2. ... Ngxf3 3. Qh7+
[quote]3. ... Kxe3 4. Qd3, Re2#
2. ... Kxf3 3. Re2+
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rxd2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5#
2. ... Kxf3 3. Rh2+
3. ... Kxe3 4. Re2#
3. ... Kxg3 4. Nh5/e2#
2. ... Ndxf3 3. Qb1+
3. ... Kxe3 4. Re2, Qd3#[/quote][/quote][/quote]
Composed by Milan Vukcevich (1.Pr. Schach-Echo 1982).
15 Apr 08
9 edits
Originally posted by heinzkatI was thinking more along the lines of:
[b]1. Qh1! [White threatens 2. f3+ Ndxf3,Ngxf3 3. Qb1+,Qh7+ Kxe3 4. Qd3#. The thematic defenses are 1. ... Rb5 and 1. ... Bb5. This is a pair of self-obstructions, which allow White to create from scratch one of the two Bristols. After 1. ... Rb5 2. Rg1+! Ndf3 3. Ra1!! and 4. Qb1# because Black can not defend with 3. ... Bb5. After 1. ... Bb5 2. Rh2+! N ...[text shortened]... 2, Qd3#[/quote][/quote][/quote][/quote]
Composed by Milan Vukcevich (1.Pr. Schach-Echo 1982).[/b]
1.Qh1!
threat: 2.f3+[quote]2...Ngxf3 3.Qh7+ Kxe3 4.Qd3#1...Bb5 2.Rh2+
2...Ndxf3 3.Qb1+ Kxe3 4.Re2#
2...Kxe3 3.Re2#
2...Kxf3 3.Re2+ Kxg3 4.Nh5#
2...Ndf3 3.Qb1+ Bd3 4.Qxd3#1...Rb5 2.Rg1+
2...Ngf3 3.Rh8 ~ 4.Qh7#
2...Ndf3 3.Ra1 ~ 4.Qb1#[/quote]Don't worry; you'll get the hang of the tabbing thing eventually. 😉
2...Ngf3 3.Qh7+ 3...Rf5 4.Qxf5#
15 Apr 08
1 edit
Originally posted by heinzkat1. Bf2+ Kh5
[fen]6b1/5p2/8/2B2K2/7k/8/6P1/8 w - -[/fen]
[b]White to move (and win)[/b]
2. g4+ Kh4
3. Kf6 Kh7 (3. ... Bh7 4. Be3🙄
4. g5 Kh8
5. Bd4 Kh7 (5. ... Bh7 6. Kxf7🙄
6. Ba1 Kh8
7. g6 fxg6 (7. ... Bh7 8. Kxf7🙄
8. Kxg6#
EDIT: Nevermind, someone posted a better solution before me.
15 Apr 08
Originally posted by Heroic MetoolLooks like the problem has a dual. 4.g5 and 4.Be3 both work.
1. Bf2+ Kh5
2. g4+ Kh4
3. Kf6 Kh7 (3. ... Bh7 4. Be3🙄
4. g5 Kh8
5. Bd4 Kh7 (5. ... Bh7 6. Kxf7🙄
6. Ba1 Kh8
7. g6 fxg6 (7. ... Bh7 8. Kxf7🙄
8. Kxg6#
EDIT: Nevermind, someone posted a better solution before me.
16 Apr 08
Originally posted by Heroic MetoolNo this one seems OK (except for a little mistake in the notation, perhaps)
1. Bf2+ Kh5
2. g4+ Kh6
3. Kf6 Kh7 (3. ... Bh7 4. Be3🙄
4. g5 Kh8
5. Bd4 Kh7 (5. ... Bh7 6. Kxf7🙄
6. Ba1 Kh8
7. g6 fxg6 (7. ... Bh7 8. Kxf7🙄
8. Kxg6#
EDIT: Nevermind, someone posted a better solution before me.
16 Apr 08
Originally posted by SwissGambitIs the position legal? (Bb1 must have traveled via a2, and how did the Bishop get on a2 while there must have been a pawn on b3 already (axb3, otherwise the pawn structure could not have been this way)
Next Problem:
[fen]1b1K3n/2pppprp/1p4p1/1p6/b1P2B2/RP2P1R1/r1PPQPPP/NB5k w[/fen]
Mate in 3
16 Apr 08
Originally posted by heinzkatOh never mind, it is possible via Bf1-b5-a4, a2xb3, b3xc4, Ba4-b3-a2, b2-b3.
Is the position legal? (Bb1 must have traveled via a2, and how did the Bishop get on a2 while there must have been a pawn on b3 already (axb3, otherwise the pawn structure could not have been this way)
16 Apr 08
1 edit
Originally posted by SwissGambitNot sure why but
Next Problem:
[fen]1b1K3n/2pppprp/1p4p1/1p6/b1P2B2/RP2P1R1/r1PPQPPP/NB5k w[/fen]
Mate in 3
1. Qd1/e1+ Kxh2
2. Rh3+ [passing on 2. Rxg6/Rg5/Rg4#] 2. ... Kxg2
3. Qh1 is mate in three
1. Qf1+ Kxh2
2. Rh3/Rxg6/Rg5/Rg4# would be possible too.
I guess there is something retrogradic we should pick up...? At first I thought perhaps the board might be inverted, but then both Kings are in check, so that doesn't help. The position ís legal, the White King on d8 could have walked there via g5-h6-g7-f8-e8-d8-c8-b7 and then Bb8-a7, Ra8-g8-g7, Kb7-c8-d8...
16 Apr 08
Originally posted by heinzkatThat's good enough if there was only this bishop to bring to b1. But there is also black's bishop on a4, white's bishop on b8, white's knight on a1, and an awful lot of traffic along the a-file to get the rooks on their final position (not only the inversion of the black and white rook on the a-file, but the other white rook must have traveled on the a-file as well as it must have been able to move sideways somewhere. I think that is not an easy task. So, proving that the position is legal may require a lot of untangling of this position. But why is it important? More so because I don't think the outcome of all that could be to proof which side is on the move since the white pieces are capabable of making triangles.
Oh never mind, it is possible via Bf1-b5-a4, a2xb3, b3xc4, Ba4-b3-a2, b2-b3.
I'm sure it will become clear one day what the puzzle is about, why it is not: "white to move mates black in 2".
16 Apr 08
Originally posted by Mephisto2Is there already 50 move rule danger? That would explain the problem perhaps. Then it'd be 1. Rxg6 (?) with Qf1#.
That's good enough if there was only this bishop to bring to b1. But there is also black's bishop on a4, white's bishop on b8, white's knight on a1, and an awful lot of traffic along the a-file to get the rooks on their final position (not only the inversion of the black and white rook on the a-file, but the other white rook must have traveled on the a-fil ...[text shortened]... clear one day what the puzzle is about, why it is not: "white to move mates black in 2".