MESON Chess Problem Database
Problem Display
PID: 90302 (2Q5/8/3q4/1k6/R1R5/8/3p4/3K4 w - - 0 1)
Sievers, K
Die Schwalbe, 1934
#2
4 + 3
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Kb6
- 2.Qa6#
- 1...Qh2
- 2.Rcb4#
- 2.Qa6#
- 2.Qb7#
- 2.Qc5#
- 2.Qc6#
- 1...Qa3
- 2.Qa6#
- 2.Qb7#
- 2.Qc6#
- 2.Qb8#
- 1...Qg3
- 2.Rcb4#
- 2.Qa6#
- 2.Qb7#
- 2.Qc5#
- 2.Qc6#
- 1...Qb4
- 2.Rcxb4#
- 2.Qa6#
- 2.Qc6#
- 1...Qf4
- 2.Qa6#
- 2.Qb7#
- 2.Qc5#
- 2.Qc6#
- 1...Qc5
- 2.Qa6#
- 2.Qxc5#
- 1...Qe5
- 2.Rcb4#
- 2.Qa6#
- 2.Qb7#
- 2.Qc6#
- 1...Qc7
- 2.Qa6#
- 1...Qe7
- 2.Qa6#
- 2.Qc6#
- 1...Qb8
- 2.Rcb4#
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 2.Qxb8#
- 1...Qf8
- 2.Qa6#
- 2.Qb7#
- 2.Qc6#
- 1...Qd3
- 2.Rcb4#
- 2.Qa6#
- 2.Qb7#
- 2.Qc5#
- 2.Qc6#
- 2.Qb8#
- 1...Qd4
- 2.Qa6#
- 2.Qc6#
- 1...Qd5
- 2.Rcb4#
- 2.Qa6#
- 1...Qa6
- 2.Rcb4#
- 2.Qxa6#
- 2.Qc5#
- 1...Qb6
- 2.Rcb4#
- 1...Qc6
- 2.Qxc6#
- 1...Qe6
- 2.Rcb4#
- 2.Qc5#
- 1...Qf6
- 2.Rcb4#
- 2.Qc5#
- 1...Qg6
- 2.Rcb4#
- 2.Qc5#
- 1...Qh6
- 2.Rcb4#
- 2.Qc5#
- 1...Qd7
- 2.Rcb4#
- 2.Qa6#
- 2.Qc5#
- 1...Qd8
- 2.Rcb4#
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Kb6
- Tries
- 1.Ra5+?
- 1...Kb6
- 2.Qa6#
- 1...Kxa5!
- 1...Kb6
- 1.Ra7?
- 1...Kb6
- 2.Qa6#
- 2.Qb7#
- 1...Qc5
- 2.Qa6#
- 2.Qxc5#
- 1...Qc7
- 2.Qa6#
- 1...Qa6
- 2.Qxa6#
- 2.Qc5#
- 1...Qc6
- 2.Qxc6#
- 1...Qh2
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qa3
- 2.Qc6#
- 1...Qg3
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qb4
- 2.Qa6#
- 2.Qc6#
- 1...Qf4
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qe5
- 2.Qa6#
- 2.Qc6#
- 1...Qe7
- 2.Qa6#
- 2.Qc6#
- 1...Qb8
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qf8
- 2.Qa6#
- 2.Qc6#
- 1...Qd3
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qd4
- 2.Qa6#
- 2.Qc6#
- 1...Qd5
- 2.Qa6#
- 1...Qe6
- 2.Qc5#
- 1...Qf6
- 2.Qc5#
- 1...Qg6
- 2.Qc5#
- 1...Qh6
- 2.Qc5#
- 1...Qd7
- 2.Qa6#
- 2.Qc5#
- 1...Qd8
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qb6!
- 1...Kb6
- 1.Ra8?
- 1...Kb6
- 2.Qa6#
- 1...Qc5
- 2.Qa6#
- 2.Qxc5#
- 1...Qc7
- 2.Qa6#
- 1...Qa6
- 2.Qxa6#
- 2.Qc5#
- 1...Qc6
- 2.Qxc6#
- 1...Qh2
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qa3
- 2.Qc6#
- 1...Qg3
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qb4
- 2.Qa6#
- 2.Qc6#
- 1...Qf4
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qe5
- 2.Qa6#
- 2.Qc6#
- 1...Qe7
- 2.Qa6#
- 2.Qc6#
- 1...Qb8
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qf8
- 2.Qa6#
- 2.Qc6#
- 1...Qd3
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qd4
- 2.Qa6#
- 2.Qc6#
- 1...Qd5
- 2.Qa6#
- 1...Qe6
- 2.Qc5#
- 1...Qf6
- 2.Qc5#
- 1...Qg6
- 2.Qc5#
- 1...Qh6
- 2.Qc5#
- 1...Qd7
- 2.Qa6#
- 2.Qc5#
- 1...Qd8
- 2.Qa6#
- 2.Qc5#
- 2.Qc6#
- 1...Qb6!
- 1...Kb6
- 1.Rc5+?
- 1...Kb6
- 2.Ra6#
- 1...Qxc5
- 2.Qa6#
- 1...Kxa4!
- 1...Kb6
- 1.Qc7?
- threat
- 2.Ra5#
- 2.Qa5#
- 1...Qb4
- 2.Rcxb4#
- 2.Qc6#
- 1...Qb6
- 2.Rcb4#
- 1...Qa3
- 2.Qa5#
- 2.Qb8#
- 2.Qc6#
- 2.Qb7#
- 1...Qc5
- 2.Qxc5#
- 1...Qa6
- 2.Rab4#
- 2.Rcb4#
- 2.Qc5#
- 1...Qc6
- 2.Qa5#
- 2.Qxc6#
- 1...Qd8
- 2.Ra5#
- 2.Rcb4#
- 2.Qc5#
- 2.Qc6#
- 1...Qxc7!
- threat
- 1.Ra5+?
- Keys
- 1.Qa8!
- threat
- 2.Qa5#
- 1...Kb6
- 2.Qa6#
- 1...Qb4
- 2.Raxb4#
- 2.Qc6#
- 2.Qa6#
- 1...Qb6
- 2.Rab4#
- 1...Qc5
- 2.Qa6#
- 1...Qc7
- 2.Rab4#
- 2.Qa6#
- 1...Qa6
- 2.Qxa6#
- 1...Qd8
- 2.Rab4#
- 2.Qc6#
- 2.Qa6#
- threat
- 1.Qa8!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- K(b);P-FLIGHT::QAR1(D)
- Q(c);N_GUARD::QAB1(D)
- Q(c);N_GUARD,SBLOCK::R1(C)
- Q(c);N_GUARD::QAB1(D),XQ(c)
- Tries
- Try
- R(B);CHECK
- Vars
- K(b);P-FLIGHT::QAR1(D)
- Refutation
- K(b);P-FLIGHT,XR(B)
- Try
- R(B);
- Vars
- Q(c);N_GUARD::QAB1(D)
- Q(c);N_GUARD::QAB1(D),XQ(c)
- Q(c);N_GUARD::QAR1(D)
- Refutation
- Q(c);
- Try
- R(B);
- Vars
- K(b);P-FLIGHT::QAR1(D)
- Q(c);N_GUARD::QAB1(D)
- Q(c);N_GUARD::QAB1(D),XQ(c)
- Q(c);N_GUARD::QAR1(D)
- Refutation
- Q(c);
- Try
- R(C);CHECK
- Vars
- K(b);P-FLIGHT::R1(B)
- Q(c);SBLOCK,XR(C)::QAB1(D)
- Refutation
- K(b);S_FLIGHT,XR(B)
- Try
- Q(D);
- Threat
- DUALS(2)
- Vars
- Q(c);N_GUARD::R1(C)
- Q(c);N_GUARD::QAR1(D),XQ(c)
- Refutation
- Q(c);XQ(D)
- Try
- Actual
- Q(D);
- Threat
- QAR1(D)
- Vars
- K(b);P-FLIGHT::QAR1(D)
- Q(c);N_GUARD,SBLOCK::R1(B)
- Q(c);N_GUARD::QAB1(D)
- Q(c);N_GUARD::QAB1(D),XQ(c)
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).