White to move and win. Can you figure out how? This is quite hard and there are a lot of variations so be patient. It will help your calculation skill though. Have fun! 
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Bh7+!!! solved after 7 secs.
Bxh7+ alone is not enough. The reply can be Kxh7, Kh8 or Kg7. Not so simple 🙂
Best wishes,
Susan Polgar
http://www.PolgarChess.com
http://www.SusanPolgar.com
1)…Bh7+
if a):
2) KxB PxR = N+
3) K-any move NxQ=won game for black
if b):
2) Ka1 PxR = Q+
3) Bg8 Qh6+
-then if b1):
4) Qh7 BxQ
-and
5) BxB Rd8++
—or 5) B-any other move Bg6+
then 6) Bf7 Rd8+
-and 7) Be8 RxB++
-if b2:)
4) Bh7 RxQ
5) KG8 Qg7++
if c):
2) Kg7 PxR = Q+
3) KxQ RxQ
4) BxP Black wins R&B versus B
ok then if u insist =) 1.-Kxh7 2.exf8+N.
1.-Kg7 2.exf8+B!(no stalemate) Kxh8 3.Rxd7
btw 2.exf8+B isnt necceseary bcoz of qg7+ kxq Rxd7 1-0
Oops
1)…Bh7+
if a):
2) KxB PxR = N+
3) K-any move NxQ=won game for black
if b1):
2) Kh8 PxR = R+
3) Kg7 RxQ
4) KxR
Black wins R+B versus B
if b2:)
4) Kh8 PxR = Q+
5) Bg8 QxB++
if c):
2) Kg7 PxR = B+
3) K takes either Bishop – RxQ
Black wins R+B versus B
Sunday, March 05, 2006 8:34:25 AM
This is one of those mornings 😉
1)…Bh7+
if a):
2) KxB PxR = N+
3) K-any move NxQ=won game for black
if b1):
2) Kh8 PxR = R+
3) Kg7 RxQ
4) KxR
Black wins K+R+B versus K+B
if b2:)
4) Kh8 PxR = R+
5) Bg8 RxB+
6) KxB RxQ+
7) KxR
Black wins K+R+P vs. K
if c):
2) Kg7 PxR = B+
3) K takes either Bishop – RxQ
Black wins K+R+B versus K+B
With corrected move numbers:
1)…Bh7+
if a):
2) KxB PxR = N+
3) K-any move NxQ=won game for black
if b1):
2) Kh8 PxR = R+
3) Kg7 RxQ
4) KxR
Black wins K+R+B versus K+B
if b2:)
2) Kh8 PxR = R+
3) Bg8 RxB+
4) KxB RxQ+
5) KxR
Black wins K+R+P vs. K
if c):
2) Kg7 PxR = B+
3) K takes either Bishop – RxQ
Black wins K+R+B versus K+B
I thought I had the solution and I had the board set up wrong.
Susan it would be nice if the board could be moved to the same page as the comments we post. that way we can look at the board while reading the solutions. and while writing out the solutions.
just a thought. I dont know if that can be done.
Tommy — the best way to solve these is to copy the board diagram (right click the board and click “Copy”). Then paste it into Microsoft Word and type your moves in there.
Tommy: when you click on the link to show the comments, hold down the shift key while clicking. This will open the comments page in separate window (which you can resize to sit next to the diagram).
It *would* be nice if the main blog page defined the comments links as ‘open in external window’ so that this effect was automatic, but the shift-click choice is always there.
Hope this helps…
Hi Susan
1. Bh7, Kg7 [1. …, Kh8 2. exf8=R,(*here if 2. exf8=Q,Kxh7((2. …, Bg8 3. Qxg8# Mate))and if 3. Rxd7 is draw!!)Kg7it takes at a similar end to the mainline; lastly if 1. …, Kxh7 2. exf8=N and 3. Nxd7 this endgame is but complicated but the White ones should win]
2. exf8=Q, Kxf8
3. Rxd7 an endgame that is won for that the Black King cannot escape from the last one lines of the board or the change of the Bishop.
Good day
For a begginer, like me :D, it can be taken a lesson from this puzzle: never promote a pawn into a queen without thinking if this is really the best promotion. With exf8=N, you capture the black queen, which make things much easier…
I would like to comment that white CAN promote to Queen in all variations, and still win.
1. Lh7+ Kg7 2 exf8Q+ Kxh7 3. Qg7+! Kxg7 4. Rxd7 followed by h6, and white wins.
1. Lh7+ Kg8 and the same idea gives white a win.
@hangover – u are wrong for sure
eg.
Bxh7+ Kxh7
exf=Q qxRd1+
and black will win …
eg2.
bxh7+ Kh8
exf=Q+ Kxh7
Qg7+ Kxg7
Rxc7 and no win with an a or h file pawn in this ending within 40 moves (as far as i remeber theory)…aul
*hummm, Voh
Vohaul: I meant in other variations than 1. – Kxh7
After 1. – Kg8 or 1.- Kg7 I am sure there is a win within 50 moves. E.g. Rook on g7 and bring the King up.
it is a “five men” ending (K, R, p vs. K, B)- and nalimov might tell us the truth – i’m gonna start a search …
my “Averbach” taught me a “draw” – but those old “selfmade” giants have been proven to be wrong by “silicon valley products” – sometimes … and i’m not sure – because i’m simply an amateur …
sincerly – Vohaul
PS: @susan – will you please forgive the use of tablebases to extrude this sophisticated question – or will you give us back your NON CONTRARY answer? THX
PS2: … still downloading table bases – thanks caissa, for my cable modem … :-))
I know Im about a year late but here is my faithful calculations. I might add I’m ready for the mental hospital, haha, man these puzzles are hard! Bh7+ Kh8 Rxd7 if Re8 Bg6 I think wins or instead of Re8 Kh7 pxf8=N or if Bh7+ Kg7 h6+ Kxh7 pxf8=N+ winning the Q and what scares me is I think there are more ways.
; ) TFK
@anonym … i don’t think your variation(s) will do any good for white! after 2. rxd7 does not follow re8?? but rc8+! instead, followed by kxh7. this will make draw for “the black hawks” – or even a win … – depending on the opponent :-))
Vohaul
ok Bobby I mean Mr Fritz!
TFK
1. Bh7+ and we have the three underpromotions!
1… Kh8
2. exf8R+ Bg8
3. Rxg8+
1… Kg7
2. exf8B+
1… Kxh7
2. exf8N+ Kg8!
3. Nxd7
The two RP/B endings after
1. Bh7+ Kxh7
2. exf8N+ Kg8!
3. Rxd7 Kxf8
and
1. Bh7+ Kh8
2. exf8Q+ Kxh7
3. Qg7+ Kxg7
4. Rxd7
are drawn
Source: Herbstman, Tyovaen Shakki, 1934, #13, second place