MESON Chess Problem Database
Problem Display
PID: 22221 (n7/KBp2b2/8/ppk4r/4RQ2/P2P4/2p1N3/6b1 w - - 0 1)
Hertzsprung, Severin Carl Ludvig
Reclam-Sammlung II, 1882
#2
7 + 9
| 5454 | Near Snap | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Ba2
- 2.Qf8#
- 1...Bb3
- 2.Qf8#
- 1...Bc4
- 2.Qf8#
- 1...Bd5
- 2.Qf8#
- 1...Be6
- 2.Qf8#
- 1...Bg6
- 2.Qf8#
- 1...Be8
- 2.Qf8#
- 1...Bg8
- 2.Qf8#
- 1...Sb6
- 2.Qxc7#
- 1...Ba2
- Tries
- 1.Rc4+?
- 1...Bxc4
- 2.Qf8#
- 1...bxc4!
- 1...Bxc4
- 1.Qe5+?
- 1...Bd5
- 2.Qe7#
- 1...Rxe5!
- 1...Bd5
- 1.Qh6?
- threat
- 2.Qf8#
- 2.Qc6#
- 1...Be6
- 2.Qf8#
- 1...Bg6
- 2.Qf8#
- 1...b4
- 2.Qc6#
- 1...c6
- 2.Qxc6#
- 1...Rd5
- 2.Qc6#
- 1...Re5
- 2.Qc6#
- 1...Bh2
- 2.Qc6#
- 1...Bd5
- 2.Qf8#
- 1...Be8
- 2.Qf8#
- 1...Rxh6!
- threat
- 1.Qf6?
- threat
- 2.Qe7#
- 2.Qc6#
- 1...Be6
- 2.Qe7#
- 2.Qf8#
- 1...b4
- 2.Qc6#
- 1...c6
- 2.Qxc6#
- 1...Rd5
- 2.Qc6#
- 1...Re5
- 2.Qc6#
- 1...Bh2
- 2.Qd4#
- 2.Qc6#
- 1...Bd5
- 2.Qe7#
- 2.Qf8#
- 1...Be8
- 2.Qe7#
- 2.Qf8#
- 1...Rh6!
- threat
- 1.Rc4+?
- Keys
- 1.Re6!
- 1...Bxe6
- 2.Qf8#
- 1...b4
- 2.Qc4#
- 1...c6
- 2.Qd6#
- 1...c1Q
- 2.Qxc1#
- 1...c1S
- 2.Qxc1#
- 1...c1B
- 2.Qxc1#
- 1...c1R
- 2.Qxc1#
- 1...Rh1
- 2.Qe5#
- 2.Qg5#
- 2.Qf5#
- 1...Rh2
- 2.Qe5#
- 2.Qg5#
- 2.Qf5#
- 1...Rh3
- 2.Qe5#
- 2.Qg5#
- 2.Qf5#
- 1...Rh4
- 2.Qe5#
- 2.Qg5#
- 2.Qf5#
- 1...Rd5
- 2.Rc6#
- 1...Re5
- 2.Qxe5#
- 1...Rf5
- 2.Qxf5#
- 1...Rg5
- 2.Qxg5#
- 1...Rh6
- 2.Qe5#
- 2.Qg5#
- 2.Qf5#
- 1...Rh7
- 2.Qe5#
- 2.Qg5#
- 2.Qf5#
- 1...Rh8
- 2.Qe5#
- 2.Qg5#
- 2.Qf5#
- 1...Bf2
- 2.Qxf2#
- 1...Bh2
- 2.Qe3#
- 2.Qf2#
- 2.Qd4#
- 1...Be3
- 2.Qxe3#
- 1...Bd4
- 2.Qxd4#
- 1...Bg6
- 2.Qf8#
- 1...Be8
- 2.Qf8#
- 1...Bg8
- 2.Qf8#
- 1...Sb6
- 2.Qxc7#
- 1...a4
- 2.Qb4#
- 1...Bxe6
- 1.Re6!
This anticipates 51321(1957)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 14
- REMOVED MATES = 4
- Sets
- B(h);OGATE::QAB(E)
- S(i);N_GUARD::QAR2(E),XP(g)
- Tries
- Try
- R(D);CHECK
- Vars
- B(h);OGATE,XR(D)::QAB(E)
- Refutation
- P(d);XR(D)
- Try
- Q(E);CHECK
- Vars
- B(h);P_SPINB(h)::QAB(E)
- Refutation
- R(f);XQ(E)
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- B(h);::QAB(E)
- P(d);::QAR1(E)
- P(g);::QAR1(E),XP(g)
- R(f);::QAR1(E)
- B(a);::QAR1(E)
- Refutation
- R(f);XQ(E)
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- P(d);::QAR1(E)
- P(g);::QAR1(E),XP(g)
- R(f);::QAR1(E)
- Refutation
- R(f);
- Try
- Actual
- R(D);
- Vars
- B(h);OGATE,XR(D)::QAB(E)
- P(d);N_GUARD::QAR1(E)
- P(g);N_GUARD::QAB1(E)
- P(b);OGATEB::QAR(E),XQ(b)
- P(b);OGATEB::QAR(E),XS(b)
- P(b);OGATEB::QAR(E),XB(b)
- P(b);OGATEB::QAR(E),XR(b)
- R(f);SBLOCK::R1(D)
- R(f);N_GUARD::QAR2(E),XR(f)
- R(f);N_GUARD::QAR(E),XR(f)
- B(a);N_GUARD::QAB(E),XB(a)
- B(a);N_GUARD::QAB1(E),XB(a)
- B(h);OGATE::QAB(E)
- S(i);N_GUARD::QAR2(E),XP(g)
- P(c);N_GUARD::QAB1(E)
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).