6 problem(s) found in 8034 milliseconds (displaying 6 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT K='Scherzaufgabe' AND K='Bosma'] [download as LaTeX]
1. Tf5+! Sxf5+ 2. Se4+! Sxe4 3. De6#
Keywords: Aristocrat, Bosma
Genre: 3#, Fairies
Computer test: C+ WinChloe v3.51
FEN: 3r2R1/3Q4/3K1k2/2n1R3/1b6/6n1/3N3q/3r4
Input: A.Buchanan, 2020-10-25
Last update: A.Buchanan, 2020-11-03 more...
Genre: 3#, Fairies
Computer test: C+ WinChloe v3.51
FEN: 3r2R1/3Q4/3K1k2/2n1R3/1b6/6n1/3N3q/3r4
Input: A.Buchanan, 2020-10-25
Last update: A.Buchanan, 2020-11-03 more...
2 - P1381880
Nikolay A. Zharkov
Probleemblad 1993
1. Preis h#
151. Thematurnier
(5+4) C+
h#2
Bosma
b) wBd4->e3
c) ferner wBd3->e4
Nikolay A. Zharkov
Probleemblad 1993
1. Preis h#
151. Thematurnier
(5+4) C+
h#2
Bosma
b) wBd4->e3
c) ferner wBd3->e4
a) 1. Dc5 d5 2. e1=T Kg1#
b) 1. Dxd3 e4 2. e1=L Kg3#
c) 1. Dd5 e5 2. e1=S Kg2#
b) 1. Dxd3 e4 2. e1=L Kg3#
c) 1. Dd5 e5 2. e1=S Kg2#
Preisrichter: "In a very subtle way three minor promotions emerge which appeal to me very much. Personally, I have a soft spot for problems like this."
A.Buchanan: Are Nikolai Sharkow & Nikolai A. Sharkow the same person? The areas of interest seem sufficiently distinct that I didn't want to merge PDB composer IDs without confirmation. (2020-11-14)
Henrik Juel: I expect that NS and NAS are identical, but who knows?
What are the solutions?
I see a Bosma mate with Df5 on, say, c2, e1=S, and Kh2 on g2, but I cannot get there (2020-11-14)
A.Buchanan: Really rather nice twinning. WinChloe thinks these are the same guy, so I'll go with that. (2020-11-14)
Henrik Juel: Certainly a worthy prize winner (2020-11-14)
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A.Buchanan: Are Nikolai Sharkow & Nikolai A. Sharkow the same person? The areas of interest seem sufficiently distinct that I didn't want to merge PDB composer IDs without confirmation. (2020-11-14)
Henrik Juel: I expect that NS and NAS are identical, but who knows?
What are the solutions?
I see a Bosma mate with Df5 on, say, c2, e1=S, and Kh2 on g2, but I cannot get there (2020-11-14)
A.Buchanan: Really rather nice twinning. WinChloe thinks these are the same guy, so I'll go with that. (2020-11-14)
Henrik Juel: Certainly a worthy prize winner (2020-11-14)
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Keywords: Bosma, under-promotion (t,l,s), Capture key
Genre: h#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 4N1rk/8/8/5q2/3P4/3P4/4p2K/7R
Input: A.Buchanan, 2020-11-14
Last update: A.Buchanan, 2020-11-18 more...
Genre: h#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 4N1rk/8/8/5q2/3P4/3P4/4p2K/7R
Input: A.Buchanan, 2020-11-14
Last update: A.Buchanan, 2020-11-18 more...
1. Se7! zz
1. ... Lh5,Le8 2. Tg8#
1. ... Kg8,La2,Lb3,Lc4,Ld5,Le6 2. Seg6#
1. ... Lg6 2. Tg8,Sexg6#
1. ... Lg8 2. Txg8,Seg6,Sfg6#
1. ... Lh5,Le8 2. Tg8#
1. ... Kg8,La2,Lb3,Lc4,Ld5,Le6 2. Seg6#
1. ... Lg6 2. Tg8,Sexg6#
1. ... Lg8 2. Txg8,Seg6,Sfg6#
Henrik Juel: Popeye says 1.Se7 and 1.Sh6
How does the Bosma condition change this?
The intention is probably 1.Sh6, as 1.Se7 entails far more duals (2020-11-14)
A.Buchanan: 1. Sh6? fails to 1. Kg8,La2,...,Le6 as can't unoverload g8. 1.Se7! has duals after Lg6 & Lg8. This isn't great but in better shape than many of the others (2020-11-14)
Henrik Juel: Thanks, Andrew
The weird condition is trickier than I thought (2020-11-14)
A.Buchanan: Haha yes Henrik: they are hard to debug: because it's always unclear whether a piece, of either colour, is helping or hurting :) (2020-11-14)
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How does the Bosma condition change this?
The intention is probably 1.Sh6, as 1.Se7 entails far more duals (2020-11-14)
A.Buchanan: 1. Sh6? fails to 1. Kg8,La2,...,Le6 as can't unoverload g8. 1.Se7! has duals after Lg6 & Lg8. This isn't great but in better shape than many of the others (2020-11-14)
Henrik Juel: Thanks, Andrew
The weird condition is trickier than I thought (2020-11-14)
A.Buchanan: Haha yes Henrik: they are hard to debug: because it's always unclear whether a piece, of either colour, is helping or hurting :) (2020-11-14)
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Keywords: Bosma, Aristocrat
Genre: 2#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 5NNk/5bRB/5K2/8/8/8/8/8
Input: A.Buchanan, 2020-11-14
Last update: A.Buchanan, 2020-11-18 more...
Genre: 2#, Fairies
Computer test: C+ WinChloe 3.51
FEN: 5NNk/5bRB/5K2/8/8/8/8/8
Input: A.Buchanan, 2020-11-14
Last update: A.Buchanan, 2020-11-18 more...
1. Tc3! zz
1. ... Txf4 2. Tc5#
1. ... Tg4 2. Sc7#
1. ... Txh3 2. Sc7#
1. ... Lxf3 2. Sf6#
1. ... Lg4 2. Sc7#
1. ... dxc3 2. Td1#
1. ... d3 2. Txd3#
1. ... Txb3 2. Le6#
1. ... Dxb4 2. Te5#
1. ... Dxb3 2. Le6#
1. ... Dxb5 2. Se7#
1. ... axb4 2. Te5#
Cook: 1. Td1! droht 2. Sf6,Sc7,Tc5#
1. ... d3 2. Txd3#
1. Td2! droht 2. Le6,Se7,Te5#
1. ... d3 2. Txd3#
1. ... Txf4 2. Tc5#
1. ... Tg4 2. Sc7#
1. ... Txh3 2. Sc7#
1. ... Lxf3 2. Sf6#
1. ... Lg4 2. Sc7#
1. ... dxc3 2. Td1#
1. ... d3 2. Txd3#
1. ... Txb3 2. Le6#
1. ... Dxb4 2. Te5#
1. ... Dxb3 2. Le6#
1. ... Dxb5 2. Se7#
1. ... axb4 2. Te5#
Cook: 1. Td1! droht 2. Sf6,Sc7,Tc5#
1. ... d3 2. Txd3#
1. Td2! droht 2. Le6,Se7,Te5#
1. ... d3 2. Txd3#
Preisrichter: "An impressive problem and a multitude of variants. The therefore also somewhat heavy position and the one dual 1 ... Kc5 or Ke5 is forgiven. A problem to play."
Correction at P1381912
A.Buchanan: This is a delightful problem, but cooked in the original. However it can be smoothly corrected by shifting wTc2 to c7 (and I don't see any other ways to do it). Alas the composer is no longer with us. (2020-11-14)
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Correction at P1381912
A.Buchanan: This is a delightful problem, but cooked in the original. However it can be smoothly corrected by shifting wTc2 to c7 (and I don't see any other ways to do it). Alas the composer is no longer with us. (2020-11-14)
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Keywords: Bosma, Superseded by (P1381912)
Genre: 2#, Fairies
Computer test: C- WinChloe 3.51
FEN: 2NQN3/8/1P1p2p1/pP1k2Pb/qP1p1P1r/rP3P1B/p1R5/K3R3
Input: A.Buchanan, 2020-11-14
Last update: A.Buchanan, 2020-11-18 more...
Genre: 2#, Fairies
Computer test: C- WinChloe 3.51
FEN: 2NQN3/8/1P1p2p1/pP1k2Pb/qP1p1P1r/rP3P1B/p1R5/K3R3
Input: A.Buchanan, 2020-11-14
Last update: A.Buchanan, 2020-11-18 more...
1. Db8! droht 2. S2c4+ Lxc4 3. Kd5#
2. ... Kxd6 3. Se5#
1. ... Lxd2 2. Sf7+ f4 3. Sd6#
2. ... c2 3. Sg5#
2. ... Kd6 3. Se5#
1. ... Txd2 2. Sc4+ f4 3. Sb2#
2. ... c2 3. Sd6#
2. ... Kd6 3. Se5#
Cook: 1. Sxb5+!
1. ... Txc7 2. Sd6 droht 3. S2c4,Sf7,S6c4#
2. Sd4 droht 3. Txe6,Sc4#
1. ... Kd6 2. Kc4+ e5 3. Dxc8#
1. Dc6! droht 2. Sf3+ exf3 3. De4#
2. Dd5+ exd5 3. Txf5#
2. Dxb5 droht 3. S2c4,Sf7,S6c4# Sc7+ 3. Kd5#
2. ... Kxd6 3. Se5#
1. ... Lxd2 2. Sf7+ f4 3. Sd6#
2. ... c2 3. Sg5#
2. ... Kd6 3. Se5#
1. ... Txd2 2. Sc4+ f4 3. Sb2#
2. ... c2 3. Sd6#
2. ... Kd6 3. Se5#
Cook: 1. Sxb5+!
1. ... Txc7 2. Sd6 droht 3. S2c4,Sf7,S6c4#
2. Sd4 droht 3. Txe6,Sc4#
1. ... Kd6 2. Kc4+ e5 3. Dxc8#
1. Dc6! droht 2. Sf3+ exf3 3. De4#
2. Dd5+ exd5 3. Txf5#
2. Dxb5 droht 3. S2c4,Sf7,S6c4# Sc7+ 3. Kd5#
A.Buchanan: Replacing sTc8 with sD eliminates one cook and simplifies the other, but 1. Sxb5+! Kd6 2. Kc4+ e5 3. Dxc8# remains. The intended solution is beautiful and ambitious - I suspect it must have been cooked before the prizes were awarded, otherwise to me it would be prize material. (2020-11-14)
A.Buchanan: Alternatively, shifting wD to b8 and wTg6 to g4 fixes everything, at the cost of a flight-taking key. On the other hand in Bosma every piece comes with a downside, and Black can use wTg6 as a defence, always threatening e6-e5 when bK has shifted to d6. This to some extent compensates for the crudeness of the key. This is an amazing problem and if it has been sound at the time, I would have given it first prize (2020-11-15)
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A.Buchanan: Alternatively, shifting wD to b8 and wTg6 to g4 fixes everything, at the cost of a flight-taking key. On the other hand in Bosma every piece comes with a downside, and Black can use wTg6 as a defence, always threatening e6-e5 when bK has shifted to d6. This to some extent compensates for the crudeness of the key. This is an amazing problem and if it has been sound at the time, I would have given it first prize (2020-11-15)
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6 - P1382079
Johann Christoffel van Gool
Henk le Grand
Probleemblad 1993
1. Lob h#
151. Thematurnier
(4+10)
h#3
shy Bosma
Johann Christoffel van Gool
Henk le Grand
Probleemblad 1993
1. Lob h#
151. Thematurnier
(4+10)
h#3
shy Bosma
1. Td3 Ke3 Dc3 Kd4 Tg4 e5#
The current WinChloe results are consistent with this problem being sound under shy Bosma: hurray!
The current WinChloe results are consistent with this problem being sound under shy Bosma: hurray!
Preisrichter: "This problem is very interesting, but it only has one solution. But it is funny to see that the white king of all pieces which closes the black queen line to e5!"
more ...
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more ...
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Keywords: Bosma (shy)
Genre: h#, Fairies
Computer test: WinChloe v3.51 finds 13995 Bosma solutions. However, in 13994 of these, the kings bump against one another. There might be another mate achievable only by dint of the kings *not* being adjacent, where Bosma condition would normally allow them to be closer.
FEN: 8/2nbp3/3k1b1R/3Pq3/4PK2/5rr1/1p4n1/8
Input: A.Buchanan, 2020-11-18
Last update: A.Buchanan, 2020-11-19 more...
Genre: h#, Fairies
Computer test: WinChloe v3.51 finds 13995 Bosma solutions. However, in 13994 of these, the kings bump against one another. There might be another mate achievable only by dint of the kings *not* being adjacent, where Bosma condition would normally allow them to be closer.
FEN: 8/2nbp3/3k1b1R/3Pq3/4PK2/5rr1/1p4n1/8
Input: A.Buchanan, 2020-11-18
Last update: A.Buchanan, 2020-11-19 more...
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The problems of this query have been registered by the following contributors:
A.Buchanan (6)
Henrik Juel: Thanks, James
I cannot test the problem, but it seems OK (2020-11-02)
A.Buchanan: Thanks Henrik: it's C+ according to WinChloe (2020-11-03)
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