MESON Chess Problem Database
Problem Display
PID: 11827 (8/8/8/8/8/KQ5p/1pR5/kq6 w - - 0 1)
Froberg, Johan Hilding Laurentius
Land og Folk, 1972
#2
3 + 4
| 3295 | Einfuhrung in die Welt des Schachproblem | 1984 |
SOLUTION
- SOUND
- Sets
- 1...Qa2+
- 2.Qxa2#
- 1...Qxc2
- 2.Qa2#
- 1...Qc1
- 2.Qa2#
- 1...Qd1
- 2.Qa2#
- 2.Qxb2#
- 1...Qe1
- 2.Qa2#
- 2.Qxb2#
- 1...Qf1
- 2.Qa2#
- 2.Qxb2#
- 1...Qg1
- 2.Qa2#
- 2.Qxb2#
- 1...Qh1
- 2.Qa2#
- 2.Qxb2#
- 1...Qa2+
- Tries
- 1.Rh2?
- 1...Qa2+
- 2.Qxa2#
- 1...Qc2
- 2.Qa2#
- 1...Qe4
- 2.Qa2#
- 2.Qxb2#
- 1...Qf5
- 2.Qa2#
- 2.Qxb2#
- 1...Qg6
- 2.Qa2#
- 2.Qxb2#
- 1...Qh7
- 2.Qa2#
- 2.Qxb2#
- 1...Qc1
- 2.Qa2#
- 1...Qd1
- 2.Qa2#
- 2.Qxb2#
- 1...Qe1
- 2.Qa2#
- 2.Qxb2#
- 1...Qf1
- 2.Qa2#
- 2.Qxb2#
- 1...Qg1
- 2.Qa2#
- 2.Qxb2#
- 1...Qh1
- 2.Qa2#
- 2.Qxb2#
- 1...Qd3!
- 1...Qa2+
- 1.Rc3?
- 1...Qa2+
- 2.Qxa2#
- 1...Qc2
- 2.Qa2#
- 1...Qd3
- 2.Qa2#
- 2.Qxb2#
- 1...Qe4
- 2.Qa2#
- 2.Qxb2#
- 1...Qf5
- 2.Qa2#
- 2.Qxb2#
- 1...Qg6
- 2.Qa2#
- 2.Qxb2#
- 1...Qh7
- 2.Qa2#
- 2.Qxb2#
- 1...Qc1
- 2.Qa2#
- 1...Qd1
- 2.Qa2#
- 2.Qxb2#
- 1...Qe1
- 2.Qa2#
- 2.Qxb2#
- 1...Qf1
- 2.Qa2#
- 2.Qxb2#
- 1...Qg1
- 2.Qa2#
- 2.Qxb2#
- 1...Qh1
- 2.Qa2#
- 2.Qxb2#
- 1...h2!
- 1...Qa2+
- 1.Qc4?
- 1...Qa2+
- 2.Qxa2#
- 1...Qxc2
- 2.Qa2#
- 1...Qc1
- 2.Qa2#
- 1...Qd1
- 2.Qa2#
- 1...Qe1
- 2.Qa2#
- 1...Qf1
- 2.Qa2#
- 1...Qg1
- 2.Qa2#
- 1...Qh1
- 2.Qa2#
- 1...h2!
- 1...Qa2+
- 1.Qd5?
- 1...Qa2+
- 2.Qxa2#
- 1...Qxc2
- 2.Qa2#
- 1...Qc1
- 2.Qa2#
- 1...Qd1
- 2.Qa2#
- 1...Qe1
- 2.Qa2#
- 1...Qf1
- 2.Qa2#
- 1...Qg1
- 2.Qa2#
- 1...Qh1
- 2.Qa2#
- 1...h2!
- 1...Qa2+
- 1.Qe6?
- 1...Qa2+
- 2.Qxa2#
- 1...Qxc2
- 2.Qa2#
- 1...Qc1
- 2.Qa2#
- 1...Qd1
- 2.Qa2#
- 1...Qe1
- 2.Qa2#
- 1...Qf1
- 2.Qa2#
- 1...Qg1
- 2.Qa2#
- 1...Qh1
- 2.Qa2#
- 1...h2!
- 1...Qa2+
- 1.Qf7?
- 1...Qa2+
- 2.Qxa2#
- 1...Qxc2
- 2.Qa2#
- 1...Qc1
- 2.Qa2#
- 1...Qd1
- 2.Qa2#
- 1...Qe1
- 2.Qa2#
- 1...Qf1
- 2.Qa2#
- 1...Qg1
- 2.Qa2#
- 1...Qh1
- 2.Qa2#
- 1...h2!
- 1...Qa2+
- 1.Qg8?
- 1...Qa2+
- 2.Qxa2#
- 1...Qxc2
- 2.Qa2#
- 1...Qc1
- 2.Qa2#
- 1...Qd1
- 2.Qa2#
- 1...Qe1
- 2.Qa2#
- 1...Qf1
- 2.Qa2#
- 1...Qg1
- 2.Qa2#
- 1...Qh1
- 2.Qa2#
- 1...h2!
- 1...Qa2+
- 1.Rh2?
- Keys
- 1.Rxb2!
- threat
- 2.Rxb1#
- 1...Qa2+
- 2.Rxa2#
- 2.Qxa2#
- 1...Qxb2+
- 2.Qxb2#
- 1...Qc2
- 2.Qa2#
- 1...Qd3
- 2.Ra2#
- 1...Qe4
- 2.Ra2#
- 2.Qa2#
- 1...Qf5
- 2.Ra2#
- 2.Qa2#
- 1...Qg6
- 2.Ra2#
- 2.Qa2#
- 1...Qh7
- 2.Ra2#
- 2.Qa2#
- 1...Qc1
- 2.Qa2#
- 1...Qd1
- 2.Ra2#
- 2.Qxd1#
- 2.Qa2#
- 1...Qe1
- 2.Ra2#
- 2.Qa2#
- 1...Qf1
- 2.Ra2#
- 2.Qa2#
- 1...Qg1
- 2.Ra2#
- 2.Qa2#
- 1...Qh1
- 2.Ra2#
- 2.Qa2#
- threat
- 1.Rxb2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- Q(b);CHECK,N_GUARD::QAR1(C),XQ(b)
- Q(b);N_GUARD,XR(A)::QAR1(C)
- Q(b);N_GUARD::QAR1(C)
- Tries
- Try
- R(A);
- Vars
- Q(b);CHECK,N_GUARD::QAR1(C),XQ(b)
- Q(b);N_GUARD::QAR1(C)
- Refutation
- Q(b);P_PINQ(C)
- Try
- R(A);
- Vars
- Q(b);CHECK,N_GUARD::QAR1(C),XQ(b)
- Q(b);N_GUARD::QAR1(C)
- Refutation
- P(d);
- Try
- Q(C);
- Vars
- Q(b);CHECK,N_GUARD::QAR1(C),XQ(b)
- Q(b);N_GUARD,XR(A)::QAR1(C)
- Q(b);N_GUARD::QAR1(C)
- Q(b);N_GUARD,SBLOCK::QAR1(C)
- Refutation
- P(d);
- Try
- Q(C);
- Vars
- Q(b);CHECK,N_GUARD::QAR1(C),XQ(b)
- Q(b);N_GUARD,XR(A)::QAR1(C)
- Q(b);N_GUARD::QAR1(C)
- Q(b);N_GUARD,SBLOCK::QAR1(C)
- Refutation
- P(d);
- Try
- Q(C);
- Vars
- Q(b);CHECK,N_GUARD::QAR1(C),XQ(b)
- Q(b);N_GUARD,XR(A)::QAR1(C)
- Q(b);N_GUARD::QAR1(C)
- Q(b);N_GUARD,SBLOCK::QAR1(C)
- Refutation
- P(d);
- Try
- Q(C);
- Vars
- Q(b);CHECK,N_GUARD::QAR1(C),XQ(b)
- Q(b);N_GUARD,XR(A)::QAR1(C)
- Q(b);N_GUARD::QAR1(C)
- Q(b);N_GUARD,SBLOCK::QAR1(C)
- Refutation
- P(d);
- Try
- Q(C);
- Vars
- Q(b);CHECK,N_GUARD::QAR1(C),XQ(b)
- Q(b);N_GUARD,XR(A)::QAR1(C)
- Q(b);N_GUARD::QAR1(C)
- Q(b);N_GUARD,SBLOCK::QAR1(C)
- Refutation
- P(d);
- Try
- Actual
- R(A);XP(c)
- Threat
- R1(A),XQ(b)
- Vars
- Q(b);CHECK,OGATE,XR(A)::QAB1(C),XQ(b)
- Q(b);N_GUARD::QAR1(C)
- Q(b);N_GUARD,P_PINQ(C)::R1(A)
- Q(b);N_GUARD,P_PINR(A)::QAR1(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).