34 problem(s) found in 3390 milliseconds (displaying 34 problem(s)). [COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT K='Rochade' AND A='Rotenberg, Jacques'] [download as LaTeX]
1 - P0006467
Michel Caillaud
Jacques Rotenberg
3927 Problemkiste 102, p. 168, 12/1995
(14+15)
BP in 6.0
N statt S in der PAS
wSU,sSU=Nachtreiter
Michel Caillaud
Jacques Rotenberg
3927 Problemkiste 102, p. 168, 12/1995
(14+15)
BP in 6.0
N statt S in der PAS
wSU,sSU=Nachtreiter
a) 1. Nxe7 Nxe2 2. Nb1 Nxc1 3. Df3 Nca5 4. Ke2 Ngc6+ 5. Kd3 Nb8 6. Ke4 Ng8+
Keywords: Unique Proof Game, Cavalier majeur
Pieces: = Nightrider (N)
Genre: Retro, Fairies
FEN: r*2nbqkb*2nr/pppp1ppp/8/8/4K3/5Q2/PPPP1PPP/R*2N3B*2NR
Input: Gerd Wilts, 1996-06-16
Last update: A.Buchanan, 2021-02-19 more...
Pieces: = Nightrider (N)
Genre: Retro, Fairies
FEN: r*2nbqkb*2nr/pppp1ppp/8/8/4K3/5Q2/PPPP1PPP/R*2N3B*2NR
Input: Gerd Wilts, 1996-06-16
Last update: A.Buchanan, 2021-02-19 more...
BS Problemid: 30256
Authors: Rotenberg, Jacques
Sources: Dutch Solving Championship 2001
Years: 1978
J. Rotenberg: 1.Cé7?,Cb4? blocus
mais 1…C×h2!
1.Td7? blocus
mais 1…C×é1!
1.Cd3? blocus
mais 1…C×f7!
1.Fg1? blocus
mais 1…C×ç6!
1.Td2! blocus
1…R×é3 2.Té2‡
1…Cé~ 2.D×f3‡
1…Cf~ 2.D×é5‡
"simple" Zappas twice (2007-03-02)
SCHRECKE: C+, popeye 4.87 (2022-12-31)
Jacques Rotenberg: "simple" Zappas :
a square around the black king (a flght square) is controlled three times by white, however white cannot remove any of these controls (2024-02-01)
comment
mais 1…C×h2!
1.Td7? blocus
mais 1…C×é1!
1.Cd3? blocus
mais 1…C×f7!
1.Fg1? blocus
mais 1…C×ç6!
1.Td2! blocus
1…R×é3 2.Té2‡
1…Cé~ 2.D×f3‡
1…Cf~ 2.D×é5‡
"simple" Zappas twice (2007-03-02)
SCHRECKE: C+, popeye 4.87 (2022-12-31)
Jacques Rotenberg: "simple" Zappas :
a square around the black king (a flght square) is controlled three times by white, however white cannot remove any of these controls (2024-02-01)
comment
Keywords: Brian Stephenson Collection (30256)
Genre: 2#
FEN: 8/2K2R2/1pN1PQp1/1B1Pn1p1/4k1P1/4Pn2/2P1R2B/4N3
Input: Brian Stephenson, 2004-08-12
Genre: 2#
FEN: 8/2K2R2/1pN1PQp1/1B1Pn1p1/4k1P1/4Pn2/2P1R2B/4N3
Input: Brian Stephenson, 2004-08-12
* 1. ... Lb7 2. Dc6 Lxc6#
1. Sb8! Lb7 2. Sd7 Lc6 3. Sf8 Lb7 4. Dc6 Kb8 5. Se6 Ka8 6. Sc7+ Kb8 7. Sa6+ Ka8 8. Ta1 Lxc6#
Frank Müller: läßt sich mit wDf3 und sLe4 um zwei Züge erweitern
1. Sb8! Lb7 2. Sd7 Lc6 3. Sf8 Lb7 4. Dc6 Kb8 5. Se6 Ka8 6. Sc7+ Kb8 7. Sa6+ Ka8 8. Ta1 Lxc6#
Frank Müller: läßt sich mit wDf3 und sLe4 um zwei Züge erweitern
Hier liegt Keine Vorgängerschaft vor, denn es wird ein interessanter 6-zügiger Rundlauf des wS gezeigt!
paul: Anticipated by P1186964 (Schildberg) (2022-09-14)
Jacques Rotenberg: not at all anticipated !!
the solution is completely different (2022-12-04)
Jacques Rotenberg: the P1186964 itself is anticipated! (2022-12-04)
Jacques Rotenberg: about P1186964 see P1186601 (2022-12-04)
Iwan Soroka: @paul. P1186964 is kein Vorgänger zu P1090925. Was genau ist anticipated? (2022-12-04)
more ...
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paul: Anticipated by P1186964 (Schildberg) (2022-09-14)
Jacques Rotenberg: not at all anticipated !!
the solution is completely different (2022-12-04)
Jacques Rotenberg: the P1186964 itself is anticipated! (2022-12-04)
Jacques Rotenberg: about P1186964 see P1186601 (2022-12-04)
Iwan Soroka: @paul. P1186964 is kein Vorgänger zu P1090925. Was genau ist anticipated? (2022-12-04)
more ...
comment
Keywords: Minimal (l), Corner mate, Model mate, Switchback (Skl), Tempo Loss, Round Trip (S-6)
Genre: s#
Computer test: I. Soroka: Gustav 3.2 d
FEN: k7/8/N1b5/3Q4/8/8/7P/1R4BK
Input: Frank Müller, 2009-09-09
Last update: Gunter Jordan, 2022-12-05 more...
Genre: s#
Computer test: I. Soroka: Gustav 3.2 d
FEN: k7/8/N1b5/3Q4/8/8/7P/1R4BK
Input: Frank Müller, 2009-09-09
Last update: Gunter Jordan, 2022-12-05 more...
1) 1. ... c8=T+ 2. Kd7 Te8 3. Kc6 Txe7 4. Kc5 Tc7#
2) 1. ... c8=S 2. Sc5 Kb6 3. Tf6 Kc7 4. Tf8 Sxd6#
3) 1. ... c8=L 2. Df6 Kb6 3. Df8 Kc7 4. Lf7 Ld7#
4) 1. ... Kb5 2. Lf7 Ka5 3. Sg8 Kb5 4. Te7 c8=D#
2) 1. ... c8=S 2. Sc5 Kb6 3. Tf6 Kc7 4. Tf8 Sxd6#
3) 1. ... c8=L 2. Df6 Kb6 3. Df8 Kc7 4. Lf7 Ld7#
4) 1. ... Kb5 2. Lf7 Ka5 3. Sg8 Kb5 4. Te7 c8=D#
Yuri Bilokin: There is a shorter way h#3 1.Bf7 Kb5 2.Sg8 Ka5 3.Re7 c8=Q# (MM) (2021-11-28)
Olaf Jenkner: The stipulation is White to play (2021-11-28)
A.Buchanan: set play can form part of a h#, but it’s certainly not a mandatory consideration, and here only exists because of the tempo play in solution 4. In no sense does set play affect soundness of a helpmate. I agree the 0.4.1 notation is confusing, particularly when the problem *does* feature set play, and try to avoid it whenever possible (2021-11-29)
comment
Olaf Jenkner: The stipulation is White to play (2021-11-28)
A.Buchanan: set play can form part of a h#, but it’s certainly not a mandatory consideration, and here only exists because of the tempo play in solution 4. In no sense does set play affect soundness of a helpmate. I agree the 0.4.1 notation is confusing, particularly when the problem *does* feature set play, and try to avoid it whenever possible (2021-11-29)
comment
Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
FEN: 4k1b1/1pP1n1pp/3pr1p1/K2p1p2/3qn3/8/8/8
Input: hpr, 2011-04-27
Last update: hpr, 2011-04-27 more...
1. Kb6 Ld5 2. Te2 Lc6 3. Tf2 Lf3 4. Kc7 Ld5 5. Tf4 Lb3 6. Tf1 Ld1 7. Tf5 Sb3 8. Kb6 Sg6 9. Td5 Se7 10. Td8+ Sc8+ 11. Txc8#
6. ... Sc2 7. Tf5 Ld5 8. Txd5 usw.
5. ... Lc6? 6. Kb6 Sg6 7. Td4 usw.
3. ... Sg6 4. Td2 Ld5 5. Txd5 usw.
2. ... Lf7? 3. Th2 Lh5 4. Td2 Sf7 5. Kc7 Sc2 6. txc2 Sd6 7. Ta2#
6. ... Sc2 7. Tf5 Ld5 8. Txd5 usw.
5. ... Lc6? 6. Kb6 Sg6 7. Td4 usw.
3. ... Sg6 4. Td2 Ld5 5. Txd5 usw.
2. ... Lf7? 3. Th2 Lh5 4. Td2 Sf7 5. Kc7 Sc2 6. txc2 Sd6 7. Ta2#
6 - P1257885
Guy Sobrecases
Jacques Rotenberg
H826 Probleemblad , p. 27, 01-03/2009
Probleemblad gewidmet
(2+12) C+
h#4
2.1...
Guy Sobrecases
Jacques Rotenberg
H826 Probleemblad , p. 27, 01-03/2009
Probleemblad gewidmet
(2+12) C+
h#4
2.1...
1) 1. Lh7 g8=T 2. Dg7 Th8 3. Kg6 Txh7 4. Kg5 Txg7#
2) 1. Ke7 g8=D 2. Le8 Dh8 3. Kf7 Df8+ 4. Kg6 Dg8#
2) 1. Ke7 g8=D 2. Le8 Dh8 3. Kf7 Df8+ 4. Kg6 Dg8#
Laut Henrik Juel gab es im Originalabdruck keine Widmung.
Mario Richter: Illegales Schach durch wBg7. (2013-01-17)
Henrik Juel: I believe the black king should be moved to f7, which renders a nicer P, and makes the problem C+ by Popeye
1.Lh7 g8=T 2.Dg7 Th8 3.Kg6 Txh7 4.Kg5 Txg7#
1.Ke7 g8=D 2.Le8 Dh8 3.Kf7 Df8+ 4.Kg6 Dg8# (2013-01-17)
Henrik Juel: The diagram in Probleemblad nr. 1, Jan.-Mar. 2009, p. 27 has sKf7, not f8.
The magazine does not mention a dedication to Probleemblad; the problem could also honour Peter van den Heuvel, who stepped down as helpmate editor at the end of 2008, but no dedication is included (2013-01-17)
Yuri Bilokin: Version: in view of the presence h#3.5 1...g8=R 2.Bh7 Rh8 3.Kg6 Rxh7 4.Kg5 Rg7# only two endings can be saved: -bQg4 8/5kP1/5pbp/5p1r/5r1b/5pp1/5p2/5K2 (2+11) h#4*
1...g8=R 2.Bh7 Rh8 3.Kg6 Rxh7 4.Kg5 Rg7# (MM)
1.Ke7 g8=Q 2.Be8 Qh8 3.Kf7 Qf8+ 4.Kg6 Qg8# (MM) (2021-11-28)
comment
Mario Richter: Illegales Schach durch wBg7. (2013-01-17)
Henrik Juel: I believe the black king should be moved to f7, which renders a nicer P, and makes the problem C+ by Popeye
1.Lh7 g8=T 2.Dg7 Th8 3.Kg6 Txh7 4.Kg5 Txg7#
1.Ke7 g8=D 2.Le8 Dh8 3.Kf7 Df8+ 4.Kg6 Dg8# (2013-01-17)
Henrik Juel: The diagram in Probleemblad nr. 1, Jan.-Mar. 2009, p. 27 has sKf7, not f8.
The magazine does not mention a dedication to Probleemblad; the problem could also honour Peter van den Heuvel, who stepped down as helpmate editor at the end of 2008, but no dedication is included (2013-01-17)
Yuri Bilokin: Version: in view of the presence h#3.5 1...g8=R 2.Bh7 Rh8 3.Kg6 Rxh7 4.Kg5 Rg7# only two endings can be saved: -bQg4 8/5kP1/5pbp/5p1r/5r1b/5pp1/5p2/5K2 (2+11) h#4*
1...g8=R 2.Bh7 Rh8 3.Kg6 Rxh7 4.Kg5 Rg7# (MM)
1.Ke7 g8=Q 2.Be8 Qh8 3.Kf7 Qf8+ 4.Kg6 Qg8# (MM) (2021-11-28)
comment
Keywords: Character problem (P), Illegal position, Minimal
Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
FEN: 8/5kP1/5pbp/5p1r/5rqb/5pp1/5p2/5K2
Input: hpr, 2012-12-29
Last update: Olaf Jenkner, 2021-11-28 more...
Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
FEN: 8/5kP1/5pbp/5p1r/5rqb/5pp1/5p2/5K2
Input: hpr, 2012-12-29
Last update: Olaf Jenkner, 2021-11-28 more...
7 - P1257896
Guy Sobrecases
Jacques Rotenberg
11319 Springaren , p. 79, 06/2008
Lob
(3+4) C+
h#5
0.2.1...
Guy Sobrecases
Jacques Rotenberg
11319 Springaren , p. 79, 06/2008
Lob
(3+4) C+
h#5
0.2.1...
1) 1. ... Ld3 2. Ka3 Kb5 3. Kb3 Lb1 4. Ld3+ Ka5 5. Kc4 La2#
2) 1. ... Lc2+ 2. Ka5 Kb3 3. Kb5 Ka3 4. Kc4 Ka4 5. Ld3 Lb3#
2) 1. ... Lc2+ 2. Ka5 Kb3 3. Kb5 Ka3 4. Kc4 Ka4 5. Ld3 Lb3#
Yuri Bilokin: you can see 1.Ka3 Kb5 2.Kb3 Ka5 3.Kc4 Ka4 4.Bd3 Ba2#
1.Ka5 Kb3 2.Kb5 Ka3 3.Kc4 Ka4 4.Bd3 Ba2#
1.Ka3 Kb5 2.Bd3+ Kb6 3.Kb3 Ka5 4.Kc4 Ba2# (2023-01-02)
comment
1.Ka5 Kb3 2.Kb5 Ka3 3.Kc4 Ka4 4.Bd3 Ba2#
1.Ka3 Kb5 2.Bd3+ Kb6 3.Kb3 Ka5 4.Kc4 Ba2# (2023-01-02)
comment
Genre: h#
Computer test: Popeye Windows-32Bit v4.51 (100000 KB)
FEN: 8/8/8/2p5/k1Kpb3/8/3P4/1B6
Input: hpr, 2012-12-29
Last update: Felber, Volker, 2013-07-01 more...
8 - P1280536
Jacques Rotenberg
22 Die Schwalbe 263, p. 240, 10/2013
1. ehrende Erwähnung
Rainer-Ehlers-Gedenkturnier
208. Thematurnier
(11+12)
#15
Jacques Rotenberg
22 Die Schwalbe 263, p. 240, 10/2013
1. ehrende Erwähnung
Rainer-Ehlers-Gedenkturnier
208. Thematurnier
(11+12)
#15
1. Tc5+! Kd4 2. Tcxf5+ Kc4 3. Tc5+ Kd4 4. Txc2+ Kd5 5. Tc5+ Kd4 6. Txc1+ Kd5 7. Tc5+ Kd4 8. Tc2+ Kd5 9. Td3+ Tdxd3 10. Tc5+ Kd4 11. Tg5+ Kc4 12. Se3+ Txe3 13. Tc5+ Kd4 14. Te5+ Kc4 15. Sd6#
9. ... Taxd3 10. Tc5+ Kd4 11. Te5+ Kc4 12. Sd6+ Txd6 13. Tc5+ Kd4 14. Tg5+ Kc4 15. Se3#
2. ... Ke4 3. T5f4+ Kd5 4. Le4+ Kc4 5. Ld3+ Kd5 6. Td4#
9. ... Taxd3 10. Tc5+ Kd4 11. Te5+ Kc4 12. Sd6+ Txd6 13. Tc5+ Kd4 14. Tg5+ Kc4 15. Se3#
2. ... Ke4 3. T5f4+ Kd5 4. Le4+ Kc4 5. Ld3+ Kd5 6. Td4#
Jacques Rotenberg: .
2...Ke4 2.T5f4+ Kd5 3.Le4+ Kc4 4.Ld3+ Kd5 5.Lc4#
Plachutta, closing of black lines (2017-07-18)
Sally: Die offensichtlichen Verteidigungen im Satz:
1. Ta2#/Sab3+/Scb3+,
weisen mit dem Zaunpfahl auf eine Schachserie hin. Trotzdem ist das Problem wahrscheinlich nicht so leicht zu lösen.
Zunächst wird mit :
1. Tc5+ - Kd4, 2. Tcxf5+ - Kc4, die Linie h7 -d3 geöffnet.
(2.-Ke4, 3. T5f4+ Kd5, 4. Le4+-Kc4, 5. Ld3+-Kd5,6.Td4,Se3#
Weiter geht es mit :
3. Tc5+ - Kd4, 4. Txc2+!
was ungeschickterweise Lb1 einschaltet (Antiziehelement)
4. - Kd5, 5. Tc5+ - Kd4,
Aber der Sc1 stört und muss geschlagen werden.
6. Txc1+ - Kd5, Mit 7. Tc5+ - Kd4, 8. Tc2+;
wird dieses Manko behoben und die Verstellung nach :
8. - Kd5 mittels 9. Td3+ verwertet.
Die Nutzung der Plachutta-Verstellung erfordert als Zwischenplan reziproke Verstellungen der s. Dame h6 und des s. Läufers h2.
Diese folgen dann auf :
9. - Tdxd3, .... 15. Sd6# , bzw 9.- Taxd3, .... 15. Se3#.
Die Plachutta-Verstellungen in Verbindung mit dem Rehm-Mechanismus und die reziproken Verstellungen s. Linienfiguren sorgen für eine kraftvolle, ungewöhnliche Umsetzung des geforderten Themas. (2017-07-19)
Anton Baumann: C+ Gustav 4.1d (2020-12-19)
more ...
comment
2...Ke4 2.T5f4+ Kd5 3.Le4+ Kc4 4.Ld3+ Kd5 5.Lc4#
Plachutta, closing of black lines (2017-07-18)
Sally: Die offensichtlichen Verteidigungen im Satz:
1. Ta2#/Sab3+/Scb3+,
weisen mit dem Zaunpfahl auf eine Schachserie hin. Trotzdem ist das Problem wahrscheinlich nicht so leicht zu lösen.
Zunächst wird mit :
1. Tc5+ - Kd4, 2. Tcxf5+ - Kc4, die Linie h7 -d3 geöffnet.
(2.-Ke4, 3. T5f4+ Kd5, 4. Le4+-Kc4, 5. Ld3+-Kd5,6.Td4,Se3#
Weiter geht es mit :
3. Tc5+ - Kd4, 4. Txc2+!
was ungeschickterweise Lb1 einschaltet (Antiziehelement)
4. - Kd5, 5. Tc5+ - Kd4,
Aber der Sc1 stört und muss geschlagen werden.
6. Txc1+ - Kd5, Mit 7. Tc5+ - Kd4, 8. Tc2+;
wird dieses Manko behoben und die Verstellung nach :
8. - Kd5 mittels 9. Td3+ verwertet.
Die Nutzung der Plachutta-Verstellung erfordert als Zwischenplan reziproke Verstellungen der s. Dame h6 und des s. Läufers h2.
Diese folgen dann auf :
9. - Tdxd3, .... 15. Sd6# , bzw 9.- Taxd3, .... 15. Se3#.
Die Plachutta-Verstellungen in Verbindung mit dem Rehm-Mechanismus und die reziproken Verstellungen s. Linienfiguren sorgen für eine kraftvolle, ungewöhnliche Umsetzung des geforderten Themas. (2017-07-19)
Anton Baumann: C+ Gustav 4.1d (2020-12-19)
more ...
comment
Keywords: Plachutta
Genre: n#
FEN: 8/B4N1B/2P1p2q/nP2Rp2/1pk5/r4R2/PPp4b/Kbnr1N2
Input: Felber, Volker, 2013-11-18
Last update: Alfred Pfeiffer, 2017-07-18 more...
Genre: n#
FEN: 8/B4N1B/2P1p2q/nP2Rp2/1pk5/r4R2/PPp4b/Kbnr1N2
Input: Felber, Volker, 2013-11-18
Last update: Alfred Pfeiffer, 2017-07-18 more...
1. Sfxe7+! exd5+ 2. Sxd5+ Sef6+,Shf6+ 3. Sdxf6+ d5+ 4. Sxd5+ Sf6+ 5. Sdxf6+ d5+ 6. Sxd5+ Te7+ 7. Sdxe7+ Ld5+ 8. Sxd5+ Te7+ 9. Sdxe7+ f5+ 10. Sxf5+ De7+ 11. Sfxe7#
correction of P1298046
Henrik Juel: 21 consecutive checks; unfortunately, the position is illegal.
White never captured, while black pawns captured six times by axbxcxd, b7xc6, c7xd6, and h7xg6; but [Pf2] could not have been captured.
Nowadays it is rare to see an illegal prize winner, so the diagram may be incorrect (Pg2?) (2015-02-25)
Henrik Juel: Now I see that Jacques, in his comment to P1298046, gave this position, so my last sentence does not apply (2015-02-25)
Henrik Juel: The illegality is even 'worse' than I first thought, because [Pe2] could not have been captured either (2015-02-27)
James Malcom: I think it would be nice to have a legal version of this record. To do this, I propose we shorten the solution until a legal position is reached.
A #9 with 33B2N1/qrrp1ppn/1Ppp1np1/2QN2k1/3PKR2/8/b2p2P1/8 seems legal, no? (2021-02-06)
Anton Baumann: störender Dual in der Lösung: ... 7.Sde7+ f5+ 8.Sxf5+ Te7+ 9.Dxe7+,Lxe7+,Sxe7+ ...
Die Stellung wird legal mit schwarzer Umwandlungsfigur: d2=sT! Aber es bleibt der Dual in der Lösung.
Mögliche legale Stellung, ohne Dual in der Lösung: a7=sT, b7=sD, -sBc6, wBb6 nach c6 (10+15) #10
Lösung: 1.Sfe7+ exd5+ ... 7.Sde7+ Ld5+ 8.Dxd5+ f5+ 9.Sxf5+ De7+ 10.Sxe7# (2021-02-11)
comment
Henrik Juel: 21 consecutive checks; unfortunately, the position is illegal.
White never captured, while black pawns captured six times by axbxcxd, b7xc6, c7xd6, and h7xg6; but [Pf2] could not have been captured.
Nowadays it is rare to see an illegal prize winner, so the diagram may be incorrect (Pg2?) (2015-02-25)
Henrik Juel: Now I see that Jacques, in his comment to P1298046, gave this position, so my last sentence does not apply (2015-02-25)
Henrik Juel: The illegality is even 'worse' than I first thought, because [Pe2] could not have been captured either (2015-02-27)
James Malcom: I think it would be nice to have a legal version of this record. To do this, I propose we shorten the solution until a legal position is reached.
A #9 with 33B2N1/qrrp1ppn/1Ppp1np1/2QN2k1/3PKR2/8/b2p2P1/8 seems legal, no? (2021-02-06)
Anton Baumann: störender Dual in der Lösung: ... 7.Sde7+ f5+ 8.Sxf5+ Te7+ 9.Dxe7+,Lxe7+,Sxe7+ ...
Die Stellung wird legal mit schwarzer Umwandlungsfigur: d2=sT! Aber es bleibt der Dual in der Lösung.
Mögliche legale Stellung, ohne Dual in der Lösung: a7=sT, b7=sD, -sBc6, wBb6 nach c6 (10+15) #10
Lösung: 1.Sfe7+ exd5+ ... 7.Sde7+ Ld5+ 8.Dxd5+ f5+ 9.Sxf5+ De7+ 10.Sxe7# (2021-02-11)
comment
Keywords: Illegal position, Consecutive checks (21), Checking key, Construction task, Construction record, Move Length Record
Genre: n#
FEN: 3Bn1N1/qrrpbppn/1Pppp1p1/2QR1Nk1/3PKR2/8/b2p2P1/8
Input: A.Buchanan, 2015-02-25
Last update: James Malcom, 2021-02-07 more...
Genre: n#
FEN: 3Bn1N1/qrrpbppn/1Pppp1p1/2QR1Nk1/3PKR2/8/b2p2P1/8
Input: A.Buchanan, 2015-02-25
Last update: James Malcom, 2021-02-07 more...
1) 1. ... Te1 2. Sgf2 Te7 3. Kg1 Txc7 4. Tg2 Te7 5. Lxh2 Te1#
2) 1. ... Tc3 2. Kh1 Txh3 3. Se3 Tf3 4. Tg1 h4 5. Sg2 Th3#
3) 1. ... Tc4 2. Shf2 Txg4+ 3. Kh3 Tf4 4. Tg2 Txf5 5. Sg4 Th5#
2) 1. ... Tc3 2. Kh1 Txh3 3. Se3 Tf3 4. Tg1 h4 5. Sg2 Th3#
3) 1. ... Tc4 2. Shf2 Txg4+ 3. Kh3 Tf4 4. Tg2 Txf5 5. Sg4 Th5#
Jacques Rotenberg: .
a lighter version was published soon after the judgement : p.91, Tehtäväniekka (juin 19)
Weiss : Kb7 Ta1 Bh2
Schwarz : Kg2 Tg6 Lb8 Sg4h3 Bc7d7c6f5
FEN : 1b6/1Kpp4/2p3r1/5p2/6n1/7n/6kP/R7 (2022-06-08)
comment
a lighter version was published soon after the judgement : p.91, Tehtäväniekka (juin 19)
Weiss : Kb7 Ta1 Bh2
Schwarz : Kg2 Tg6 Lb8 Sg4h3 Bc7d7c6f5
FEN : 1b6/1Kpp4/2p3r1/5p2/6n1/7n/6kP/R7 (2022-06-08)
comment
Keywords: Corner mate (in 2), Line opening, Model mate, Switchback, Selfblock
Genre: h#
FEN: 1b6/2p5/K1p3r1/1ppp1p2/6n1/7n/6kP/2R5
Reprints: A5556 Phénix 305, p. 11938, 03/2020
Input: Gunter Jordan, 2020-10-19
Last update: Gunter Jordan, 2020-10-19 more...
Genre: h#
FEN: 1b6/2p5/K1p3r1/1ppp1p2/6n1/7n/6kP/2R5
Reprints: A5556 Phénix 305, p. 11938, 03/2020
Input: Gunter Jordan, 2020-10-19
Last update: Gunter Jordan, 2020-10-19 more...
11 - P1382055
Jacques Rotenberg
Dominique Forlot
7852 Phénix 273-274 05-06/2017
(3+3) C+
h#4
b) sLg7 statt sBg7
Jacques Rotenberg
Dominique Forlot
7852 Phénix 273-274 05-06/2017
(3+3) C+
h#4
b) sLg7 statt sBg7
a) 1. Se5-f7 Tc6-c8 2. Kd5-e6 Tc8-a8 3. Ke6-e7 Lh2-b8 4. Ke7-f8 Lb8-d6#
b) 1. Kd5-d4 Tc6-c8 2. Se5-d3 Lh2-c7 3. Kd4-c3 Ka1-a2 4. Lg7-d4 Lc7-a5#
b) 1. Kd5-d4 Tc6-c8 2. Se5-d3 Lh2-c7 3. Kd4-c3 Ka1-a2 4. Lg7-d4 Lc7-a5#
Jacques Rotenberg: Dominique Forlot is co-author
Themes :
Indian, critical moves, echo model mates (2020-11-20)
comment
Themes :
Indian, critical moves, echo model mates (2020-11-20)
comment
Keywords: Forsberg Twins
Genre: h#
Computer test: Popeye 4.83
FEN: 8/6p1/2R5/3kn3/8/8/7B/K7
Input: Marcin Banaszek, 2020-11-18
Last update: Alfred Pfeiffer, 2020-11-26 more...
Genre: h#
Computer test: Popeye 4.83
FEN: 8/6p1/2R5/3kn3/8/8/7B/K7
Input: Marcin Banaszek, 2020-11-18
Last update: Alfred Pfeiffer, 2020-11-26 more...
1. Tb2+? Ka3!
1. Lf3! ... 2. Ld1#
Inspired by P1182074
White releases stalemate as a #2, giving Black 20(!) moves. First record in a new task. See:
http://matplus.net/start.php?px=1606065655&app=forum&act=posts&fid=gen&tid=2586&pid=20040#n20040
1. Lf3! ... 2. Ld1#
Inspired by P1182074
White releases stalemate as a #2, giving Black 20(!) moves. First record in a new task. See:
http://matplus.net/start.php?px=1606065655&app=forum&act=posts&fid=gen&tid=2586&pid=20040#n20040
Henrik Juel: No record, P1182074 is far better in terms of giving Black moves, 32
But this problem also a #2 (2020-11-22)
A.Buchanan: First record in a new task (2020-11-22)
James Malcom: Henrik, you misunderstood! The task is different from the 32! This is about Black release in the #2 form, not releae in the fairy form. (2020-11-22)
comment
But this problem also a #2 (2020-11-22)
A.Buchanan: First record in a new task (2020-11-22)
James Malcom: Henrik, you misunderstood! The task is different from the 32! This is about Black release in the #2 form, not releae in the fairy form. (2020-11-22)
comment
Keywords: Stalemate dissolution
Genre: 2#
Computer test: Popeye 4.85
FEN: 8/8/NN1p4/1p1B4/1Pr5/1kb4R/3R4/1KB5
Input: James Malcom, 2020-11-22
Last update: James Malcom, 2021-06-22 more...
Genre: 2#
Computer test: Popeye 4.85
FEN: 8/8/NN1p4/1p1B4/1Pr5/1kb4R/3R4/1KB5
Input: James Malcom, 2020-11-22
Last update: James Malcom, 2021-06-22 more...
16 mates with double check
http://matplus.net/start.php?px=1607750786&app=forum&act=posts&fid=gen&tid=2281
HBae: vgl. P1178768 von Colin V. Vaughan fs 1976 (2020-12-13)
HBae: An der Mittelsenkrechten gespiegelt durch Vaughn fast steingetreu vorweggenommen. (2020-12-13)
comment
HBae: An der Mittelsenkrechten gespiegelt durch Vaughn fast steingetreu vorweggenommen. (2020-12-13)
comment
Genre: n#
FEN: 1n1b1n2/1QPkPQ2/2N5/2KN4/B5N1/7B/8/3R4
Input: James Malcom, 2020-12-13
Last update: James Malcom, 2020-12-13 more...
14 - P1391055
Jacques Rotenberg
Michel Caillaud
PS3607 The Problemist Supplement 169, p. 115, 11/2020
(6+14) C+
h#2
5.1...
Jacques Rotenberg
Michel Caillaud
PS3607 The Problemist Supplement 169, p. 115, 11/2020
(6+14) C+
h#2
5.1...
1) 1. Sb5 axb5 2. Dxb5 La3#
2) 1. Dxb6 Le3 2. Dc5 Lxc5#
3) 1. Dxe5 Lf4 2. Dd6 Lxd6#
4) 1. f5 Lg5 2. De7+ Lxe7#
5) 1. g6 Lh6 2. Df8+ Lxf8#
2) 1. Dxb6 Le3 2. Dc5 Lxc5#
3) 1. Dxe5 Lf4 2. Dd6 Lxd6#
4) 1. f5 Lg5 2. De7+ Lxe7#
5) 1. g6 Lh6 2. Df8+ Lxf8#
Keywords: Capture key
Genre: h#
Computer test: Popeye WINDOWS98-32Bit-Version 3.77 (8192KB)
FEN: rn6/Qpn2Kp1/1P2pp2/2q1P3/Pkb1p3/1pb2r2/8/2B5
Input: Felber, Volker, 2021-06-25
Last update: Alfred Pfeiffer, 2021-11-13 more...
Genre: h#
Computer test: Popeye WINDOWS98-32Bit-Version 3.77 (8192KB)
FEN: rn6/Qpn2Kp1/1P2pp2/2q1P3/Pkb1p3/1pb2r2/8/2B5
Input: Felber, Volker, 2021-06-25
Last update: Alfred Pfeiffer, 2021-11-13 more...
15 - P1391350
Jacques Rotenberg
Uri Avner
G34 8. WCCT 2005-2008
3. Platz
(15+15) C+
#2
Anticirce type Cheylan
wTR,sTR=Pao
wLR,sLR=Vao
Jacques Rotenberg
Uri Avner
G34 8. WCCT 2005-2008
3. Platz
(15+15) C+
#2
Anticirce type Cheylan
wTR,sTR=Pao
wLR,sLR=Vao
* 1. ... VAf4xh6[+sVAh1] 2. Ta1xc1[+wTa1]#
* 1. ... PAf6xh6[+sPAh1] 2. Ld5xb7[+wLf1]#
* 1. ... PAf5xh5[+sPAh1] 2. Ta1-b1#
* 1. ... VAf7xh5[+sVAh1] 2. Sd6xb7[+wSb1]#
1. Ke6-e5! droht 2. Ta8-b8#
1. ... VAf4xh6[+sVAh1] 2. Ld5xb7[+wLf1]#
1. ... PAf6xh6[+sPAh1] 2. Ta1-b1#
1. ... PAf5xh5[+sPAh1] 2. Sd6xb7[+wSb1]#
1. ... VAf7xh5[+sVAh1] 2. Ta1xc1[+wTa1]#
1. ... Tc8-b8 2. Sd6-c8#
* 1. ... PAf6xh6[+sPAh1] 2. Ld5xb7[+wLf1]#
* 1. ... PAf5xh5[+sPAh1] 2. Ta1-b1#
* 1. ... VAf7xh5[+sVAh1] 2. Sd6xb7[+wSb1]#
1. Ke6-e5! droht 2. Ta8-b8#
1. ... VAf4xh6[+sVAh1] 2. Ld5xb7[+wLf1]#
1. ... PAf6xh6[+sPAh1] 2. Ta1-b1#
1. ... PAf5xh5[+sPAh1] 2. Sd6xb7[+wSb1]#
1. ... VAf7xh5[+sVAh1] 2. Ta1xc1[+wTa1]#
1. ... Tc8-b8 2. Sd6-c8#
Jacques Rotenberg: Lacny 4x2
rebirth clash or a1, c1, d1, h1 (and, arguably on a8)
specific battery mates - non of the mates are given by the moving piece
reminder "Cheylan" means that a capture on the rebirth square is forbidden, here, the Pao a5 cannot capture on a8 (2021-10-14)
comment
rebirth clash or a1, c1, d1, h1 (and, arguably on a8)
specific battery mates - non of the mates are given by the moving piece
reminder "Cheylan" means that a capture on the rebirth square is forbidden, here, the Pao a5 cannot capture on a8 (2021-10-14)
comment
16 - P1393858
Jacques Rotenberg
2397 Die Schwalbe 1978
Informalturnier der
Schwalbe 1978 Dreizüger
2. Preis
(12+11)
#3
Jacques Rotenberg
2397 Die Schwalbe 1978
Informalturnier der
Schwalbe 1978 Dreizüger
2. Preis
(12+11)
#3
1. Sbxc4? Dxd5! 1. Sexc4? Te5! 1. Lxc4? Txa6!
1. Te6! Tgxe6 2. Sbxc4
1. ... Dxe6 2. Sexc4
1. ... Texe6 2. Lxc4
1. Te6! Tgxe6 2. Sbxc4
1. ... Dxe6 2. Sexc4
1. ... Texe6 2. Lxc4
Henrik Juel: Many double threats, duals, and mate duals
The three thematical variations are (almost) correct (2021-09-20)
Jacques Rotenberg: The way the tries and solution should be shown is as follow :
1.Sbxc4? Dxd5!/Txe5!
1.Lxc4? Dxd5!/Tb6!
1.Sexc4? Ta6!/Txe2!
1.Te6! [2.Sbxc4!/2.Lxc4!/2.Sexc4!]
1. ...Tgxe6 2. Sbxc4! [3.Sxa3#, 3.Se3#] (2...Dxd5?/T7xe5?)
1. ...Dxe6 2. Sexc4! [3.Sxa3#, 3.Ld3#] (2...Ta6?/Txe2?)
1. ...Texe6 2. Lxc4! [3.Lb3#, 3.Ld3#] (2...Dxd5?/Tgb6?)
reciprocal interception of 3 same moving pieces on the same square with clear logic structure.
The three white moves are on the same square
1...Sxd2 2.Sed3! [3.Sb4#, 3.Se1#, 3.Tc1#]
1...Sxe5 2.a8=D!
1...axb2 2.b8=D!
no dual and no mate dual (2021-09-23)
Henrik Juel: Thanks for the enlightenment, Jacques (2021-09-23)
comment
The three thematical variations are (almost) correct (2021-09-20)
Jacques Rotenberg: The way the tries and solution should be shown is as follow :
1.Sbxc4? Dxd5!/Txe5!
1.Lxc4? Dxd5!/Tb6!
1.Sexc4? Ta6!/Txe2!
1.Te6! [2.Sbxc4!/2.Lxc4!/2.Sexc4!]
1. ...Tgxe6 2. Sbxc4! [3.Sxa3#, 3.Se3#] (2...Dxd5?/T7xe5?)
1. ...Dxe6 2. Sexc4! [3.Sxa3#, 3.Ld3#] (2...Ta6?/Txe2?)
1. ...Texe6 2. Lxc4! [3.Lb3#, 3.Ld3#] (2...Dxd5?/Tgb6?)
reciprocal interception of 3 same moving pieces on the same square with clear logic structure.
The three white moves are on the same square
1...Sxd2 2.Sed3! [3.Sb4#, 3.Se1#, 3.Tc1#]
1...Sxe5 2.a8=D!
1...axb2 2.b8=D!
no dual and no mate dual (2021-09-23)
Henrik Juel: Thanks for the enlightenment, Jacques (2021-09-23)
comment
Keywords: Doppeldrohung
Genre: 3#
FEN: 5bq1/PP1pr2b/R5r1/3PN3/2pB2p1/p1P2n2/KNkPB3/3R4
Reprints: 2397 Die Schwalbe 61, p. 26, 02/1980
Input: Dieter Berlin, 2021-09-20
Last update: Dieter Berlin, 2021-09-20 more...
Genre: 3#
FEN: 5bq1/PP1pr2b/R5r1/3PN3/2pB2p1/p1P2n2/KNkPB3/3R4
Reprints: 2397 Die Schwalbe 61, p. 26, 02/1980
Input: Dieter Berlin, 2021-09-20
Last update: Dieter Berlin, 2021-09-20 more...
17 - P1394237
Jacques Rotenberg
18543 Die Schwalbe 308 04/2021
Julia Vysotska gewidmet
(2+10+2)
h#2 2.1;1.1
take&make
Jacques Rotenberg
18543 Die Schwalbe 308 04/2021
Julia Vysotska gewidmet
(2+10+2)
h#2 2.1;1.1
take&make
a) 1.nTe4 nT:e2-g1 2.L:g2-g8 nL:g1-a1#, b) 1.f:g2-g7+ nT:f1-g2 2.nT:h2-c7 nT:b7-a8#.
LaTeX-import:
Keyword not uniquely identified: reziproke Schläge
SCHRECKE: C+, popeye 4.87 (2021-10-04)
Jacques Rotenberg: .
Diagonal/orthogonal echo
reciprocal captures
mates in the corners
paradoxical capture of the only white piece of the diagram in both solutions (2021-10-14)
Jacques Rotenberg: it means : Zilahi (2021-10-14)
comment
Keyword not uniquely identified: reziproke Schläge
SCHRECKE: C+, popeye 4.87 (2021-10-04)
Jacques Rotenberg: .
Diagonal/orthogonal echo
reciprocal captures
mates in the corners
paradoxical capture of the only white piece of the diagram in both solutions (2021-10-14)
Jacques Rotenberg: it means : Zilahi (2021-10-14)
comment
18 - P1399804
Jacques Rotenberg
Jean-Marc Loustau
4727 Die Schwalbe 87, p. 271, 06/1984
2. Preis
Informalturnier
Dreizüger
(12+14)
#3
Jacques Rotenberg
Jean-Marc Loustau
4727 Die Schwalbe 87, p. 271, 06/1984
2. Preis
Informalturnier
Dreizüger
(12+14)
#3
1. Dg7? Dxd5 2. Se6+ 1. ... Dd4 2. Se4+ 1. ... Dxe5 2. Sf7+ 1. ... De3!
1. Db7? Dxd5 2. Se4+ 1. ... Dd4 2. Sf7+ 1. ... Dxe5 2. Se6+ 1. ... De3!
1. Da7! Dxd5 2. Sf7+ 1. ... Dd4 2. Se6+ 1. ... Dxe5 2. Se4+
1. ... De3 2. fxe3+ 1. ... Kxe5 2. Dg7+
1. Db7? Dxd5 2. Se4+ 1. ... Dd4 2. Sf7+ 1. ... Dxe5 2. Se6+ 1. ... De3!
1. Da7! Dxd5 2. Sf7+ 1. ... Dd4 2. Se6+ 1. ... Dxe5 2. Se4+
1. ... De3 2. fxe3+ 1. ... Kxe5 2. Dg7+
Henrik Juel: In solution trial 1... Lg2 2.Sf3,Sf7,fxg3+ and mate duals after 1... De3 2.fxe3+ Kxe5 (2022-03-15)
comment
comment
Keywords: Lacny cycle
Genre: 3#
FEN: 2n3B1/5Q1R/K2n3B/3PPpN1/2p1qkpR/3p1bpP/3bpP2/5Nrr
Reprints: 4727 Die Schwalbe 100, p. 122, 08/1986
Input: Dieter Berlin, 2022-03-15
Last update: Dieter Berlin, 2022-03-15 more...
Genre: 3#
FEN: 2n3B1/5Q1R/K2n3B/3PPpN1/2p1qkpR/3p1bpP/3bpP2/5Nrr
Reprints: 4727 Die Schwalbe 100, p. 122, 08/1986
Input: Dieter Berlin, 2022-03-15
Last update: Dieter Berlin, 2022-03-15 more...
Jacques Rotenberg: 1.Se3+?
1…Kd2 2.Ld4+ T×c6(c2) 3.L×d3(d7) [4.Sc4‡] e5+ 4.S×d5(Lc8) [5.Le3‡, 5.Lc3‡] Tf6+ 5.S×f6 [6.Se4‡, 6.c×b3(Sg8)‡]
mais 1…Ke2!
1.Sh2+? Ke2 2.Ld4+ S×c5(c2), T×c6(c2), L×c6(c2) 3.L×d3(d7)+ Kd2 4.Sf3‡
mais 1…Kd2!
1.Ld4? [2.Se3‡, 2.Sh2‡, 2.Sg3‡]
mais 1…e5+!
1.Sg3+!
1…Kd2 2.Ld4+!
2…T×c6(c2) 3.c×b3(Sg8)+ T×c7(c2)+ 4.c×d3(d7)+ T×c5(c2) 5.c4+ Tc×c4(c2) 6.c3+ T×c3(c2) 7.Le3‡
5…L×c4(c2) 6.T×g2(g7)+ D×g2(Th1) 7.Td1‡
6…Ke1 7.Ta1‡ (7…L×d4(Lc1)??)
(5.c3+? L×b3(b2)!)
3…T×c5(c2) 4.c3+ T×c7(c2)+ 5.c×d3(d7)+ L×b3(b2) 6.Le3+ Kc2 7.d4‡
4…L×b3(b2) 5.Le3+ Kc2 6.L×d3(d7)‡
(4.c×d3(d7)+? L×b3(b2) 5.Le3+ Kc2 6.Tc1+ D×c1(Ta1) 7.T×c1(Dd8)‡, 4…Tc2!
4.c4+? Ta×c4(c2) 5.c3+ T×c7(c2)+ 6.c×d3(d7)+ T×c3(c2) 7.Le3‡
4…Tc×c4(c2)! 5.c3+ T×c7(c2)+! 6.c×d3(d7)+ L×b3(b2)!)
(3.c×d3(d7)+? S×c5(c2)!
3.L×d3(d7)? [4.Se4‡] e5+!)
2…S×c5(c2) 3.L×d3(d7) [4.Se4‡] e5+ 4.Ke8 [5.Se4‡] Lf7+ 5.K×f7(Lc8) [6.Se4‡] S×d3(Lf1) 6.Se4+ Kc1 7.L×d3(Sg8)‡
(4.Kg6? T×c6+!)
(6.L×d3(Sg8)? [7.Se4‡] Sh6+!) (2022-06-08)
Jacques Rotenberg: Albino (2022-06-08)
Anton Baumann: C+ Alybadix (2023-05-11)
comment
1…Kd2 2.Ld4+ T×c6(c2) 3.L×d3(d7) [4.Sc4‡] e5+ 4.S×d5(Lc8) [5.Le3‡, 5.Lc3‡] Tf6+ 5.S×f6 [6.Se4‡, 6.c×b3(Sg8)‡]
mais 1…Ke2!
1.Sh2+? Ke2 2.Ld4+ S×c5(c2), T×c6(c2), L×c6(c2) 3.L×d3(d7)+ Kd2 4.Sf3‡
mais 1…Kd2!
1.Ld4? [2.Se3‡, 2.Sh2‡, 2.Sg3‡]
mais 1…e5+!
1.Sg3+!
1…Kd2 2.Ld4+!
2…T×c6(c2) 3.c×b3(Sg8)+ T×c7(c2)+ 4.c×d3(d7)+ T×c5(c2) 5.c4+ Tc×c4(c2) 6.c3+ T×c3(c2) 7.Le3‡
5…L×c4(c2) 6.T×g2(g7)+ D×g2(Th1) 7.Td1‡
6…Ke1 7.Ta1‡ (7…L×d4(Lc1)??)
(5.c3+? L×b3(b2)!)
3…T×c5(c2) 4.c3+ T×c7(c2)+ 5.c×d3(d7)+ L×b3(b2) 6.Le3+ Kc2 7.d4‡
4…L×b3(b2) 5.Le3+ Kc2 6.L×d3(d7)‡
(4.c×d3(d7)+? L×b3(b2) 5.Le3+ Kc2 6.Tc1+ D×c1(Ta1) 7.T×c1(Dd8)‡, 4…Tc2!
4.c4+? Ta×c4(c2) 5.c3+ T×c7(c2)+ 6.c×d3(d7)+ T×c3(c2) 7.Le3‡
4…Tc×c4(c2)! 5.c3+ T×c7(c2)+! 6.c×d3(d7)+ L×b3(b2)!)
(3.c×d3(d7)+? S×c5(c2)!
3.L×d3(d7)? [4.Se4‡] e5+!)
2…S×c5(c2) 3.L×d3(d7) [4.Se4‡] e5+ 4.Ke8 [5.Se4‡] Lf7+ 5.K×f7(Lc8) [6.Se4‡] S×d3(Lf1) 6.Se4+ Kc1 7.L×d3(Sg8)‡
(4.Kg6? T×c6+!)
(6.L×d3(Sg8)? [7.Se4‡] Sh6+!) (2022-06-08)
Jacques Rotenberg: Albino (2022-06-08)
Anton Baumann: C+ Alybadix (2023-05-11)
comment
20 - P1402237
James Malcom
Jacques Rotenberg
Problemiste 2012
JR Version JM
SuperProblem.net 01/06/2022
(9+14)
#10
James Malcom
Jacques Rotenberg
Problemiste 2012
JR Version JM
SuperProblem.net 01/06/2022
(9+14)
#10
1. Sfxe7+ cxd5+ 2. Sxd5+ Sef6+ 3. Sdxf6+ d5+ 4. Sxd5+ Sf6+ 5. Sdxf6+ d5+ 6. Sxd5+ Te7+ 7. Sdxe7+ Ld5+ 8. Dxd5+ f5+ 9. Sxf5+ Te7+ 10. Sfxe7#
7. ... f5+ 8. Sxf5+ Te7+ 9. Sfxe7+ Ld5+ 10. Dxd5#
See P1298074
Record for consecutive checks in a legal directmate
http://superproblem.ru/archive/probl/N/Rotenberg-10x-2012.gif
7. ... f5+ 8. Sxf5+ Te7+ 9. Sfxe7+ Ld5+ 10. Dxd5#
See P1298074
Record for consecutive checks in a legal directmate
http://superproblem.ru/archive/probl/N/Rotenberg-10x-2012.gif
Henrik Juel: mate trial in first variation
9.Sxf5+ Kh5 10.Sxg7,Sg3,Th4# (2022-06-26)
Jacques Rotenberg: If you really want a legal diagramme, you can begin after the key of P1298074, black to play, it will be legal and the longest sequence of checks (2022-06-30)
Jacques Rotenberg: ...doing so is not really enough ... no last move!
a tricky way would be - from diag P1298074 : - f5, -e7, + white knight f6 with 20 checks ahead + 2 retro checks ! (2022-07-01)
Jacques Rotenberg: ...not good either (2022-07-05)
Jacques Rotenberg: btw, I don't agree that my name will be as author of this diagram.
I am author of P1298074 not of this. (2022-07-08)
comment
9.Sxf5+ Kh5 10.Sxg7,Sg3,Th4# (2022-06-26)
Jacques Rotenberg: If you really want a legal diagramme, you can begin after the key of P1298074, black to play, it will be legal and the longest sequence of checks (2022-06-30)
Jacques Rotenberg: ...doing so is not really enough ... no last move!
a tricky way would be - from diag P1298074 : - f5, -e7, + white knight f6 with 20 checks ahead + 2 retro checks ! (2022-07-01)
Jacques Rotenberg: ...not good either (2022-07-05)
Jacques Rotenberg: btw, I don't agree that my name will be as author of this diagram.
I am author of P1298074 not of this. (2022-07-08)
comment
Keywords: Consecutive checks (19)
Genre: n#
FEN: 3Bn1N1/qrrpbppn/1Ppp2p1/2QR1Nk1/3PKR2/8/b7/8
Input: James Malcom, 2022-06-26
Last update: James Malcom, 2022-06-26 more...
Genre: n#
FEN: 3Bn1N1/qrrpbppn/1Ppp2p1/2QR1Nk1/3PKR2/8/b7/8
Input: James Malcom, 2022-06-26
Last update: James Malcom, 2022-06-26 more...
21 - P1402371
Matthieu Leschemelle
Jacques Rotenberg
435/2 Europe Echecs 1995
Paris 09/12/1994
(6+6) C+
#2
Matthieu Leschemelle
Jacques Rotenberg
435/2 Europe Echecs 1995
Paris 09/12/1994
(6+6) C+
#2
1. Sb4! droht 2. Db3#
1. ... Tbxb4 2. Ta5#
1. ... Tcxb4,Tcxd4 2. Txc3#
1. ... Kxb4 2. Txb5#
1. ... Tbxb4 2. Ta5#
1. ... Tcxb4,Tcxd4 2. Txc3#
1. ... Kxb4 2. Txb5#
Henrik Juel: C+ Popeye 4.61 (2022-06-30)
Jacques Rotenberg: Plachutta in 2 moves! (2022-07-06)
comment
Jacques Rotenberg: Plachutta in 2 moves! (2022-07-06)
comment
Genre: 2#
Computer test: Henrik Juel (2022-06-30): C+ Popeye 4.61
FEN: 8/1q2B3/2p5/1rR5/2rN4/k1p5/N1Q3K1/8
Input: ML, 2022-06-30
Last update: Mario Richter, 2022-07-01 more...
Solution: 1. Sac4! [2. Sb6, Qa3#]
1. ... Bxc4 2. Bd7#
1. ... Qb2 2. Sxb2#
1. ... Qxc4 2. Bd1#
1. ... Bxc4 2. Bd7#
1. ... Qb2 2. Sxb2#
1. ... Qxc4 2. Bd1#
Henrik Juel: double threat and duals after 1... Df3,Dd3,De3 (2022-07-01)
Jacques Rotenberg: 1...Df3 and 1...Dd3 are not defences
To add a black pawn on c5 would forbid De3 to be a defence, but... it is not evident to know if it is worth doing so (2022-07-01)
comment
Jacques Rotenberg: 1...Df3 and 1...Dd3 are not defences
To add a black pawn on c5 would forbid De3 to be a defence, but... it is not evident to know if it is worth doing so (2022-07-01)
comment
Genre: 2#
FEN: 8/5p2/p2Nb2K/6n1/k5BR/N1Q5/4q3/8
Input: ML, 2022-06-30
Last update: ML, 2022-06-30 more...
23 - P1402458
Jean-Marc Loustau
Michel Caillaud
Jacques Rotenberg
5900 Die Schwalbe 08/1987
3. Preis
2. Halbjahr 1987
(8+10) C+
#2
Jean-Marc Loustau
Michel Caillaud
Jacques Rotenberg
5900 Die Schwalbe 08/1987
3. Preis
2. Halbjahr 1987
(8+10) C+
#2
1. Dg6-g3? droht 2. Sf4-d3#
1. ... Dh3-f5 2. Dg3-a3#
1. ... Dh3xg3 2. Sf4-e6#
1. ... e2-e1=S!
1. Dg6-g4? droht 2. Sf4-e6#
1. ... Dh3-e3 2. Dg4-c8#
1. ... Dh3xg4 2. Sf4-d3#
1. ... e2-e1=D!
1. Dg6-e4! droht 2. De4xd4# 2. De4xe7#
1. ... Dh3-f5 2. Sf4-d3#
1. ... Dh3-e3 2. Sf4-e6#
1. ... Sf6xe4 2. Th5xd5#
1. ... Sf6xh5 2. De4xd5#
Judge Fritz Hoffmann 08/1990
1. ... Dh3-f5 2. Dg3-a3#
1. ... Dh3xg3 2. Sf4-e6#
1. ... e2-e1=S!
1. Dg6-g4? droht 2. Sf4-e6#
1. ... Dh3-e3 2. Dg4-c8#
1. ... Dh3xg4 2. Sf4-d3#
1. ... e2-e1=D!
1. Dg6-e4! droht 2. De4xd4# 2. De4xe7#
1. ... Dh3-f5 2. Sf4-d3#
1. ... Dh3-e3 2. Sf4-e6#
1. ... Sf6xe4 2. Th5xd5#
1. ... Sf6xh5 2. De4xd5#
Judge Fritz Hoffmann 08/1990
Jacques Rotenberg: :
Dombrovskis paradox
1. Dg6-g3? droht 2. Sf4-d3# A
1. ... Dh3-f5 a 2. Dg3-a3#
1. ... Dh3-f5 forbids 2. Sf4-d3# (a forbids A)
1. Dg6-g4? droht 2. Sf4-e6# B
1. ... Dh3-e3 b 2. Dg4-c8#
1. ... Dh3-e3 forbids 2. Sf4-e6# (b forbids B)
1. Dg6-e4! droht 2. De4xd4# 2. De4xe7#
1. ... Dh3-f5 2. Sf4-d3#
1. ... Dh3-e3 2. Sf4-e6#
now a provokes A and b provokes B (2022-07-19)
comment
Dombrovskis paradox
1. Dg6-g3? droht 2. Sf4-d3# A
1. ... Dh3-f5 a 2. Dg3-a3#
1. ... Dh3-f5 forbids 2. Sf4-d3# (a forbids A)
1. Dg6-g4? droht 2. Sf4-e6# B
1. ... Dh3-e3 b 2. Dg4-c8#
1. ... Dh3-e3 forbids 2. Sf4-e6# (b forbids B)
1. Dg6-e4! droht 2. De4xd4# 2. De4xe7#
1. ... Dh3-f5 2. Sf4-d3#
1. ... Dh3-e3 2. Sf4-e6#
now a provokes A and b provokes B (2022-07-19)
comment
Genre: 2#
Computer test: Popeye 4.83
FEN: 8/Kp2b3/1R3nQ1/1Bkr3R/p1Pp1N1p/7q/2N1p3/8
Input: Marcin Banaszek, 2022-07-05
Last update: Marcin Banaszek, 2022-07-05 more...
24 - P1411271
Jacques Rotenberg
OP023 The Hopper Magazine I03 30/12/2022
(2+2) C+
HS#5 Antineukoko b) Kh2-->b1 c) Kh2-->h6 d) Kb4-->f3
Jacques Rotenberg
OP023 The Hopper Magazine I03 30/12/2022
(2+2) C+
HS#5 Antineukoko b) Kh2-->b1 c) Kh2-->h6 d) Kb4-->f3
a) 1. Lg1 Kc3 2. Kh3 c1=D 3. Ld4+ Kb3 4. Lb2 Ka4 5. Lh8 Da3#
b) 1. Ka2 Kb3+ 2. Ka1 c1=S 3. Kb1 Kb2 4. Ld2 Ka3 5. Ka1 Kb2#
c) 1. Lg5 Kb3 2. Kh7 c1=L 3. Lh6 Lg5 4. Lf8 Lh6 5. Kh8 Lg7#
d) 1. Ld4 Ke4 2. Lf2 Kd3 3. Kg3 c1=T 4. Lc5 Kc4 5. Lf8 Tc3#
b) 1. Ka2 Kb3+ 2. Ka1 c1=S 3. Kb1 Kb2 4. Ld2 Ka3 5. Ka1 Kb2#
c) 1. Lg5 Kb3 2. Kh7 c1=L 3. Lh6 Lg5 4. Lf8 Lh6 5. Kh8 Lg7#
d) 1. Ld4 Ke4 2. Lf2 Kd3 3. Kg3 c1=T 4. Lc5 Kc4 5. Lf8 Tc3#
Keywords: AntiNeuKöko, Allumwandlung, Minimal, Miniature
Genre: Fairies
Computer test: C+, Jacobi v0.7.5
FEN: 8/8/8/8/1k6/4B3/2p4K/8
Input: Miguel Ambrona, 2023-07-26
Last update: Dieter Berlin, 2024-02-01 more...
Genre: Fairies
Computer test: C+, Jacobi v0.7.5
FEN: 8/8/8/8/1k6/4B3/2p4K/8
Input: Miguel Ambrona, 2023-07-26
Last update: Dieter Berlin, 2024-02-01 more...
1. Kg1 Tb1 2. h1=S Ta1 3. Sxg3 Kxg3 4. Kh1 Txc1#
Genre: h#
Computer test: C+, Gustav 4.2e, Brute Force
FEN: 8/8/6p1/6Pb/6pK/p5P1/P6p/R1n4k
Input: Miguel Ambrona, 2023-07-26
Last update: A.Buchanan, 2023-07-28 more...
26 - P1411273
Jacques Rotenberg
SS085 The Hopper Magazine I03 30/12/2022
(6+9) C+
h#1.5
b) wDh7->h4
Breton
Jacques Rotenberg
SS085 The Hopper Magazine I03 30/12/2022
(6+9) C+
h#1.5
b) wDh7->h4
Breton
a) 1. ... Sb3 2. Txb3[-sSg1] Tc4#
b) 1. ... Tb5 2. Kxd3[-sSg1] Tb3#
b) 1. ... Tb5 2. Kxd3[-sSg1] Tb3#
1. Dh1! droht 2. Da8#
1. ... Sf3,Se4,Sc4,Sb3,Sb1 2. Db1#
1. ... Sf3,Se4,Sc4,Sb3,Sb1 2. Db1#
Jacques Rotenberg: a special kind of anti-dual (or black correction) :
a random move of the knight d2 provokes 2.Qb1# that would come as a dual. It appears that all the possible moves forbid the threat and 1...Sg1!? forbids the mate on b1
tries :
1.Dd1? blocus e2!
1.De1? blocus e2!
1.Dg1? blocus Cf1!
1.b3?/1.b4? [2.Db2‡] Cc4!
1.D×d2? [2.Da5‡] e×d2! (2024-02-01)
more ...
comment
a random move of the knight d2 provokes 2.Qb1# that would come as a dual. It appears that all the possible moves forbid the threat and 1...Sg1!? forbids the mate on b1
tries :
1.Dd1? blocus e2!
1.De1? blocus e2!
1.Dg1? blocus Cf1!
1.b3?/1.b4? [2.Db2‡] Cc4!
1.D×d2? [2.Da5‡] e×d2! (2024-02-01)
more ...
comment
Jacques Rotenberg: .
1.Le4? [2.D×e3 A,Df5‡ B]
1…K×e4 2.Dc4‡
1…e×f2 !
1.D×e7? [2.D×e3‡ A]
1…Le4 a 2.D×e4‡ C
1…e×f2 !
1.D×c2? [2.Df5‡ B]
1…Te4 b 2.D×e4‡ C
1…Te5 !
1.Lc6! [2.Sg2‡]
1…Le4 a 2.D×e3‡ A
1…Te4 b 2.Df5‡ B
1…L×g6+ 2.S×g6‡
1…e×f2 2.D×f2‡
1.Dd5? [2.Sg2,Df3‡]
mais 1…Le4 !
1.La8? [2.Sg2‡]
1…c6 !
Grimshaw
Novotny
Dombrovskis paradox (2024-02-20)
Jacques Rotenberg: .
1.Ld5? [2.Sg2‡]
1…Le4 2.D×e3‡
1…L×g6+ 2.S×g6‡
1…T×f7 2.D×e3‡
1…e×f2 2.D×f2‡
1…Te4!
1.Dd5? [2.Sg2‡, 2.Df3‡]
1…L×g6+ 2.S×g6‡
1…Te4 2.Df5‡
1…Le4!
a pair of tries refuted by the Grimshaw moves (2024-02-20)
more ...
comment
1.Le4? [2.D×e3 A,Df5‡ B]
1…K×e4 2.Dc4‡
1…e×f2 !
1.D×e7? [2.D×e3‡ A]
1…Le4 a 2.D×e4‡ C
1…e×f2 !
1.D×c2? [2.Df5‡ B]
1…Te4 b 2.D×e4‡ C
1…Te5 !
1.Lc6! [2.Sg2‡]
1…Le4 a 2.D×e3‡ A
1…Te4 b 2.Df5‡ B
1…L×g6+ 2.S×g6‡
1…e×f2 2.D×f2‡
1.Dd5? [2.Sg2,Df3‡]
mais 1…Le4 !
1.La8? [2.Sg2‡]
1…c6 !
Grimshaw
Novotny
Dombrovskis paradox (2024-02-20)
Jacques Rotenberg: .
1.Ld5? [2.Sg2‡]
1…Le4 2.D×e3‡
1…L×g6+ 2.S×g6‡
1…T×f7 2.D×e3‡
1…e×f2 2.D×f2‡
1…Te4!
1.Dd5? [2.Sg2‡, 2.Df3‡]
1…L×g6+ 2.S×g6‡
1…Te4 2.Df5‡
1…Le4!
a pair of tries refuted by the Grimshaw moves (2024-02-20)
more ...
comment
Genre: 2#
Computer test: Juel: Popeye 4.61
FEN: 1b6/2p1rNpK/5pP1/2Q5/5kPN/4p2P/2b2P2/7B
Input: Miguel Ambrona, 2023-07-27
Last update: Dieter Berlin, 2024-02-20 more...
1) 1. Tg3! Txf4 2. Tf3 Te4#
2) 1. Kd4! e4 2. Ke3 Lc5#
2) 1. Kd4! e4 2. Ke3 Lc5#
Keywords: Switchback (1) + 2))
Genre: h#
Computer test: C+, popeye 4.87
FEN: 8/8/8/6p1/1B3r1b/4kr1q/4PRb1/1B4K1
Input: Miguel Ambrona, 2023-07-27
Last update: Dieter Berlin, 2024-02-01 more...
Genre: h#
Computer test: C+, popeye 4.87
FEN: 8/8/8/6p1/1B3r1b/4kr1q/4PRb1/1B4K1
Input: Miguel Ambrona, 2023-07-27
Last update: Dieter Berlin, 2024-02-01 more...
30 - P1411305
Jacques Rotenberg
SS038 The Hopper Magazine I02 25/6/2022
(4+4) C+
H#3 (set play, 2 solutions)
Jacques Rotenberg
SS038 The Hopper Magazine I02 25/6/2022
(4+4) C+
H#3 (set play, 2 solutions)
*) 1. ... Ta4 2. c3 bxc3 3. Se5 Td4#
1) 1. Sa4! Lxc6+ 2. Kc5 Ta5+ 3. Kb4 Tb5#
2) 1. Sa6! Lc8 2. Kc5 b4+ 3. Kb6 Tb7#
1) 1. Sa4! Lxc6+ 2. Kc5 Ta5+ 3. Kb4 Tb5#
2) 1. Sa6! Lc8 2. Kc5 b4+ 3. Kb6 Tb7#
Jacques Rotenberg: Echo model mates, chameleon echo, the bishop being used in the mates as a pawn going backwards (2024-02-01)
more ...
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Genre: h#
Computer test: C+, popeye 4.87
FEN: 7K/R2B4/2n5/2nk4/2p5/8/1P6/8
Input: Miguel Ambrona, 2023-07-27
Last update: Dieter Berlin, 2024-02-01 more...
31 - P1411306
Jacques Rotenberg
OP017 The Hopper Magazine I02 25/6/2022
(5+8)
H#2 Take & Make (just 1 solution)
Jacques Rotenberg
OP017 The Hopper Magazine I02 25/6/2022
(5+8)
H#2 Take & Make (just 1 solution)
Jacques Rotenberg: .
1.T×g3(Tg4) T×a6(Ta5) 2.T×g2(Tg4) T×a7(Ta5)‡
each move is a switchback : 4 'invisible' moves
black/white echo (2024-02-21)
Henrik Juel: C+ Popeye 4.61 (2024-02-21)
comment
1.T×g3(Tg4) T×a6(Ta5) 2.T×g2(Tg4) T×a7(Ta5)‡
each move is a switchback : 4 'invisible' moves
black/white echo (2024-02-21)
Henrik Juel: C+ Popeye 4.61 (2024-02-21)
comment
Keywords: take&make Chess
Genre: h#, Fairies
FEN: krb5/pq6/p7/R7/6r1/1p4PK/6R1/7B
Input: Miguel Ambrona, 2023-07-27
Last update: A.Buchanan, 2023-07-27 more...
Genre: h#, Fairies
FEN: krb5/pq6/p7/R7/6r1/1p4PK/6R1/7B
Input: Miguel Ambrona, 2023-07-27
Last update: A.Buchanan, 2023-07-27 more...
32 - P1411329
Jacques Rotenberg
SS051 The Hopper Magazine I02 25/06/2022
(2+2+2)
H#2 Neutrals
(2 solutions)
Jacques Rotenberg
SS051 The Hopper Magazine I02 25/06/2022
(2+2+2)
H#2 Neutrals
(2 solutions)
Jacques Rotenberg: .
Mistake in the diagram! :the queen g8 is neutral!
1.Sne2+ Sn×g3+ 2.Snf5 g4‡
1.Dn×g3+ Dng6+ 2.Kh4 g3‡
exchange of functions between Sng1 and Dng8
cross checks (2024-02-21)
Henrik Juel: C+ Popeye 4.61 (2024-02-21)
comment
Mistake in the diagram! :the queen g8 is neutral!
1.Sne2+ Sn×g3+ 2.Snf5 g4‡
1.Dn×g3+ Dng6+ 2.Kh4 g3‡
exchange of functions between Sng1 and Dng8
cross checks (2024-02-21)
Henrik Juel: C+ Popeye 4.61 (2024-02-21)
comment
33 - P1411336
Jacques Rotenberg
Guy Sobrecases
SS082 The Hopper Magazine I03 30/12/2022
(3+2) C+
H#4 Grasshoppers b) Ge1-->f2
c) Continued Kh1-->h8 d) Continued Kf5-->f8
Jacques Rotenberg
Guy Sobrecases
SS082 The Hopper Magazine I03 30/12/2022
(3+2) C+
H#4 Grasshoppers b) Ge1-->f2
c) Continued Kh1-->h8 d) Continued Kf5-->f8
a) 1. c1=L Kg4 2. Ld2 Gc3 3. Le3 Kg3 4. Lg1 Gh3#
b) 1. c1=G Kg5 2. Gh6 Kf4 3. Ge3 Kg3 4. Gg1 Gh4#
c) 1. c1=T Gf6 2. Tc2 Gb2 3. Tc8 Kg6 4. Tg8+ Gg7#
d) 1. c1=D Ge2 2. Dc2 Gb2 3. Df5+ Gf6 4. Dh7 Gg7#
b) 1. c1=G Kg5 2. Gh6 Kf4 3. Ge3 Kg3 4. Gg1 Gh4#
c) 1. c1=T Gf6 2. Tc2 Gb2 3. Tc8 Kg6 4. Tg8+ Gg7#
d) 1. c1=D Ge2 2. Dc2 Gb2 3. Df5+ Gf6 4. Dh7 Gg7#
Jacques Rotenberg: all the possible promotions with these pieces (no possible mate with a black S) (2024-02-01)
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Pieces: = Grasshopper (G)
Genre: h#, Fairies
Computer test: C+ Popeye 4.61
FEN: 8/8/8/5K2/8/8/2p4*2Q/4*2Q2k
Input: A.Buchanan, 2023-07-27
Last update: A.Buchanan, 2023-07-28 more...
34 - P1415128
Jacques Rotenberg
PS3952 The Problemist Supplement 185, p. 306, 07/2023
(9+8) C+
#2
2 Lösungen
Jacques Rotenberg
PS3952 The Problemist Supplement 185, p. 306, 07/2023
(9+8) C+
#2
2 Lösungen
1) 1. Df7 droht 2. Te3#
1. ... Lxe4 2. Lh5#
1. ... Sd5 2. Sd4#
1. ... Sf6 2. Sg5#
2) 1. Db7 droht 2. Lh5#
1. ... Lxe4 2. Dxe4#
1. ... Sd5 2. Sd4#
1. ... Sf6 2. Sg5#
1. ... Lxe4 2. Lh5#
1. ... Sd5 2. Sd4#
1. ... Sf6 2. Sg5#
2) 1. Db7 droht 2. Lh5#
1. ... Lxe4 2. Dxe4#
1. ... Sd5 2. Sd4#
1. ... Sf6 2. Sg5#
Jacques Rotenberg: .
Exchange of motive of defense between Sd5 and Sf6
long lines black focal queen
Dombrovskis paradox (2024-02-20)
comment
Exchange of motive of defense between Sd5 and Sf6
long lines black focal queen
Dombrovskis paradox (2024-02-20)
comment
Genre: 2#
Computer test: Gustav 4.1d
FEN: 3qn3/Q5pN/1n2p1B1/1N2P3/2p1RB2/3b1k1P/8/6K1
Input: Felber, Volker, 2024-02-19
Last update: Felber, Volker, 2024-02-19 more...
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Gerd Wilts (1)Brian Stephenson (1)
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hpr (3)
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ML (2)
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stip dia 6
forsyth rnbqkbnr/pppp1ppp/8/8/4K3/5Q2/PPPP1PPP/RN3BNR
cond cavaliermaj (2023-06-16)
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