MESON Chess Problem Database
Problem Display
PID: 89860 (8/5P1b/6P1/1p4BQ/4R3/b1kp1P2/K3p3/Nn2R3 w - - 0 1)
Junker, Karl
Die Schwalbe, 1960
#2
9 + 7
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bc1
- 2.Rxc1#
- 1...Bb4
- 2.Rc1#
- 1...Bc5
- 2.Rc1#
- 1...Bd6
- 2.Rc1#
- 1...Be7
- 2.Rc1#
- 1...Bf8
- 2.Rc1#
- 1...Bxg6
- 2.Qh8#
- 1...Bg8
- 2.Qh8#
- 1...Sd2
- 2.Bf6#
- 1...Bc1
- Tries
- 1.Bd2+?
- 1...Sxd2
- 2.Qe5#
- 1...Kxd2!
- 1...Sxd2
- 1.Be3?
- threat
- 2.Qe5#
- 1...Bc5
- 2.Rc1#
- 2.Qxc5#
- 1...Bd6
- 2.Rc1#
- 1...d2!
- threat
- 1.Bf4?
- threat
- 2.Qe5#
- 1...Bc5
- 2.Rc1#
- 2.Qxc5#
- 1...Bd6
- 2.Rc1#
- 1...d2!
- threat
- 1.Bh6?
- threat
- 2.Qe5#
- 1...Bc5
- 2.Rc1#
- 2.Qxc5#
- 1...Bd6
- 2.Rc1#
- 1...d2!
- threat
- 1.Qh2?
- threat
- 2.Qe5#
- 1...Bc5
- 2.Rc1#
- 1...Bd6
- 2.Rc1#
- 1...d2!
- threat
- 1.Qh4?
- 1...Bxg6
- 2.Qh8#
- 1...d2
- 2.Re3#
- 1...Bc1
- 2.Rxc1#
- 1...Bb4
- 2.Rc1#
- 1...Bc5
- 2.Rc1#
- 1...Bd6
- 2.Rc1#
- 1...Be7
- 2.Rc1#
- 1...Bf8
- 2.Rc1#
- 1...Bg8
- 2.Qh8#
- 1...Sd2
- 2.Bf6#
- 1...b4
- 2.Rc4#
- 1...Bb2!
- 1...Bxg6
- 1.Qh6?
- threat
- 2.Bf6#
- 2.Qg7#
- 1...Bc5
- 2.Rc1#
- 1...Bd6
- 2.Rc1#
- 1...Be7
- 2.Rc1#
- 1...Bf8
- 2.Bf6#
- 2.Rc1#
- 1...d2!
- threat
- 1.Qxh7?
- threat
- 2.Qg7#
- 2.Qh8#
- 1...Bc5
- 2.Rc1#
- 1...Bd6
- 2.Rc1#
- 1...Be7
- 2.Rc1#
- 1...Bf8
- 2.Rc1#
- 1...d2!
- threat
- 1.gxh7?
- threat
- 2.h8Q#
- 2.h8B#
- 1...Bb2
- 2.h8Q#
- 2.h8B#
- 1...Bc1
- 2.Rxc1#
- 2.h8Q#
- 2.h8B#
- 1...Bb4
- 2.Rc1#
- 2.h8Q#
- 2.h8B#
- 1...Bc5
- 2.Rc1#
- 1...Bd6
- 2.Rc1#
- 1...Be7
- 2.Rc1#
- 1...Bf8
- 2.Rc1#
- 1...Sd2
- 2.Bf6#
- 2.h8Q#
- 2.h8B#
- 1...b4
- 2.h8Q#
- 2.h8B#
- 1...d2!
- threat
- 1.Bd2+?
- Keys
- 1.Qh3!
- 1...Bxg6
- 2.Qh8#
- 1...d2
- 2.f4#
- 1...Bb2
- 2.Qc8#
- 1...Bc1
- 2.Rxc1#
- 2.Qc8#
- 1...Bb4
- 2.Rc1#
- 1...Bc5
- 2.Rc1#
- 1...Bd6
- 2.Rc1#
- 1...Be7
- 2.Rc1#
- 1...Bf8
- 2.Rc1#
- 1...Bg8
- 2.Qh8#
- 1...Sd2
- 2.Bf6#
- 1...b4
- 2.Qc8#
- 1...Bxg6
- 1.Qh3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- B(c);N_GUARD::R(B),XB(c)
- B(c);N_GUARD::R(B)
- B(g);OGATE,XP(H)::QAB(G)
- B(g);OGATE,P_PINP(I)::QAB(G)
- S(a);SBLOCK::B(F)
- Tries
- Try
- B(F);CHECK
- Vars
- S(a);SBLOCK,XB(F)::QAB(G)
- Refutation
- K(d);S_FLIGHT,XB(F)
- Try
- B(F);
- Threat
- QAB(G)
- Vars
- B(c);N_GUARD::R(B)
- Refutation
- P(e);
- Try
- B(F);
- Threat
- QAB(G)
- Vars
- B(c);N_GUARD::R(B)
- Refutation
- P(e);
- Try
- B(F);
- Threat
- QAB(G)
- Vars
- B(c);N_GUARD::R(B)
- Refutation
- P(e);
- Try
- Q(G);
- Threat
- QAB(G)
- Vars
- B(c);N_GUARD::R(B)
- Refutation
- P(e);
- Try
- Q(G);
- Vars
- B(g);OGATE,XP(H)::QAB(G)
- P(e);OGATEB,SBLOCK::R(E)
- B(c);N_GUARD::R(B),XB(c)
- B(c);N_GUARD::R(B)
- B(g);OGATE,P_PINP(I)::QAB(G)
- S(a);SBLOCK::B(F)
- P(f);N_GUARD::R1(E)
- Refutation
- B(c);
- Try
- Q(G);
- Threat
- DUALS(2)
- Vars
- B(c);N_GUARD::R(B)
- Refutation
- P(e);
- Try
- Q(G);XB(g)
- Threat
- DUALS(2)
- Vars
- B(c);N_GUARD::R(B)
- Refutation
- P(e);
- Try
- P(H);XB(g)
- Threat
- P=Q
- Vars
- B(c);::P=Q
- B(c);N_GUARD::R(B)
- P(f);::P=Q
- Refutation
- P(e);
- Try
- Actual
- Q(G);
- Vars
- B(g);OGATE,XP(H)::QAB(G)
- P(e);SBLOCK::QAR(G)+P(D)
- B(c);N_GUARD::QAR(G)
- B(c);N_GUARD::R(B)
- B(g);OGATE,P_PINP(I)::QAB(G)
- S(a);SBLOCK::B(F)
- P(f);S_CUTB(c)::QAR(G)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).