MESON Chess Problem Database
Problem Display
PID: 6971 (8/8/5Q2/2Nk4/1K2R1q1/3P4/8/8 w - - 0 1)
Karlstrom, Alfred Olaf
Die Schwalbe, 1935
#2
5 + 2
| 4884 | 154 norske miniatyrproblemer | 1974 |
| 273 | Mat Plus | 1995 |
| 3242 | BCPS Rapid Solving (Cheltenham) | 2001 |
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Rd4#
- 2.Qe6#
- 1...Qe2
- 2.Rd4#
- 2.Qe6#
- 1...Qf3
- 2.Rd4#
- 2.Qe6#
- 1...Qh3
- 2.Rd4#
- 1...Qf5
- 2.Rd4#
- 1...Qh5
- 2.Rd4#
- 2.Qe6#
- 1...Qe6
- 2.Qxe6#
- 1...Qd7
- 2.Rd4#
- 1...Qc8
- 2.Rd4#
- 1...Qg1
- 2.Qe6#
- 1...Qg2
- 2.Rd4#
- 2.Qe6#
- 1...Qg3
- 2.Rd4#
- 2.Qe6#
- 1...Qxe4+
- 2.dxe4#
- 1...Qf4
- 2.Qe6#
- 1...Qh4
- 2.Qe6#
- 1...Qg5
- 2.Rd4#
- 2.Qe6#
- 1...Qg6
- 2.Rd4#
- 1...Qg7
- 2.Rd4#
- 2.Qe6#
- 1...Qg8
- 2.Rd4#
- 1...Qd1
- Tries
- 1.Kb5?
- threat
- 2.Qd4#
- 2.Qe5#
- 2.Qc6#
- 1...Qxe4
- 2.dxe4#
- 1...Qe6
- 2.Rd4#
- 2.Qd4#
- 2.Qxe6#
- 1...Qf5
- 2.Rd4#
- 2.Qd4#
- 2.Qc6#
- 1...Qh5
- 2.Rd4#
- 2.Qd4#
- 2.Qd8#
- 2.Qc6#
- 2.Qe6#
- 1...Qc8
- 2.Rd4#
- 2.Qd4#
- 2.Qe5#
- 1...Qg1
- 2.Qe5#
- 2.Qd8#
- 2.Qc6#
- 2.Qe6#
- 1...Qg3
- 2.Rd4#
- 2.Qd4#
- 2.Qc6#
- 2.Qe6#
- 1...Qf4
- 2.Qd4#
- 2.Qc6#
- 2.Qe6#
- 1...Qg5
- 2.Rd4#
- 2.Qd4#
- 2.Qc6#
- 2.Qe6#
- 1...Qg6
- 2.Rd4#
- 2.Qd4#
- 2.Qe5#
- 1...Qg7
- 2.Rd4#
- 2.Qc6#
- 2.Qe6#
- 1...Qd7+!
- threat
- 1.Sb3?
- 1...Qe6
- 2.Qxe6#
- 1...Qd1
- 2.Rd4#
- 2.Re5#
- 2.Qe6#
- 1...Qe2
- 2.Rd4#
- 2.Qe6#
- 1...Qf3
- 2.Rd4#
- 2.Re5#
- 2.Qe6#
- 1...Qh3
- 2.Rd4#
- 2.Re5#
- 1...Qf5
- 2.Rd4#
- 1...Qh5
- 2.Rd4#
- 2.Qe6#
- 1...Qd7
- 2.Rd4#
- 2.Re5#
- 1...Qc8
- 2.Rd4#
- 2.Re5#
- 1...Qg1
- 2.Re5#
- 2.Qe6#
- 1...Qg2
- 2.Rd4#
- 2.Re5#
- 2.Qe6#
- 1...Qg3
- 2.Rd4#
- 2.Qe6#
- 1...Qf4
- 2.Qe6#
- 1...Qh4
- 2.Qe6#
- 1...Qg5
- 2.Rd4#
- 2.Qe6#
- 1...Qg6
- 2.Rd4#
- 2.Re5#
- 1...Qg7
- 2.Rd4#
- 2.Re5#
- 2.Qe6#
- 1...Qg8
- 2.Rd4#
- 2.Re5#
- 1...Qxe4+!
- 1...Qe6
- 1.Sa4?
- threat
- 2.Sc3#
- 2.Sb6#
- 1...Qe6
- 2.Qxe6#
- 1...Qc8
- 2.Sb6#
- 2.Rd4#
- 1...Qg1
- 2.Sc3#
- 2.Qe6#
- 1...Qxe4+!
- threat
- 1.Sa6?
- threat
- 2.Sc7#
- 1...Qe6
- 2.Qxe6#
- 1...Qd7
- 2.Rd4#
- 1...Qc8
- 2.Rd4#
- 1...Qg3
- 2.Rd4#
- 2.Qe6#
- 1...Qf4
- 2.Qe6#
- 1...Qg7
- 2.Rd4#
- 2.Qe6#
- 1...Qxe4+!
- threat
- 1.Sb7?
- threat
- 2.Qd6#
- 1...Qe6
- 2.Qxe6#
- 1...Qd7
- 2.Rd4#
- 1...Qg3
- 2.Rd4#
- 2.Qe6#
- 1...Qf4
- 2.Qe6#
- 1...Qg6
- 2.Rd4#
- 1...Qxe4+!
- threat
- 1.Sd7?
- threat
- 2.Sb6#
- 1...Qxd7
- 2.Rd4#
- 1...Qe6
- 2.Qxe6#
- 1...Qg1
- 2.Qe6#
- 1...Qxe4+!
- threat
- 1.Rf4?
- 1...Qe6
- 2.Qxe6#
- 1...Qd1
- 2.Rd4#
- 2.Rf5#
- 2.Qe6#
- 1...Qe2
- 2.Rd4#
- 1...Qf3
- 2.Rd4#
- 2.Qe6#
- 1...Qh3
- 2.Rd4#
- 1...Qf5
- 2.Rd4#
- 2.Rxf5#
- 1...Qh5
- 2.Rd4#
- 2.Qe6#
- 1...Qd7
- 2.Rd4#
- 1...Qc8
- 2.Rd4#
- 1...Qg1
- 2.Rf5#
- 2.Qe6#
- 1...Qg2
- 2.Rd4#
- 2.Rf5#
- 2.Qe6#
- 1...Qg3
- 2.Rd4#
- 2.Qe6#
- 1...Qh4
- 2.Qe6#
- 1...Qg5
- 2.Rd4#
- 2.Qe6#
- 1...Qg6
- 2.Rd4#
- 1...Qg7
- 2.Rd4#
- 2.Rf5#
- 2.Qe6#
- 1...Qg8
- 2.Rd4#
- 2.Rf5#
- 1...Qxf4+!
- 1...Qe6
- 1.Qd8+?
- 1...Qd7
- 2.Qxd7#
- 1...Kc6!
- 1...Qd7
- 1.Kb5?
- Keys
- 1.Rc4!
- 1...Qxc4+
- 2.dxc4#
- 1...Qe6
- 2.Qxe6#
- 1...Qd1
- 2.Rd4#
- 2.Qe6#
- 1...Qe2
- 2.Rd4#
- 1...Qf3
- 2.Rd4#
- 2.Qe6#
- 1...Qh3
- 2.Rd4#
- 1...Qf5
- 2.Rd4#
- 1...Qh5
- 2.Rd4#
- 2.Qe6#
- 1...Qd7
- 2.Rd4#
- 1...Qc8
- 2.Rd4#
- 1...Qg1
- 2.Qe6#
- 1...Qg2
- 2.Rd4#
- 2.Qe6#
- 1...Qg3
- 2.Rd4#
- 2.Qe6#
- 1...Qd4
- 2.Rxd4#
- 2.Qe6#
- 1...Qe4
- 2.dxe4#
- 1...Qf4
- 2.Qe6#
- 1...Qh4
- 2.Qe6#
- 1...Qg5
- 2.Rd4#
- 2.Qe6#
- 1...Qg6
- 2.Rd4#
- 1...Qg7
- 2.Rd4#
- 2.Qe6#
- 1...Qg8
- 2.Rd4#
- 1...Qxc4+
- 1.Rc4!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- Q(a);N_GUARD,N_PINR(C)::R1(C)
- Q(a);N_GUARD,N_PINR(C)::QAB1(E),XQ(a)
- Q(a);N_GUARD,N_PINR(C)::QAB1(E)
- Q(a);CHECK,OGATE,XR(C)::P(A),XQ(a)
- Q(a);N_GUARD::QAB1(E)
- Tries
- Try
- K(B);N_SPINR(C),P-FLIGHT
- Threat
- DUALS(3)
- Vars
- Q(a);OGATE,XR(C)::P(A),XQ(a)
- Refutation
- Q(a);CHECK
- Try
- S(D);
- Vars
- Q(a);N_GUARD,N_PINR(C)::QAB1(E),XQ(a)
- Q(a);N_GUARD,N_PINR(C)::R1(C)
- Q(a);N_GUARD::QAB1(E)
- Refutation
- Q(a);CHECK,XR(C)
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- Q(a);N_GUARD,N_PINR(C)::QAB1(E),XQ(a)
- Refutation
- Q(a);CHECK,XR(C)
- Try
- S(D);
- Threat
- S(D)
- Vars
- Q(a);N_GUARD,N_PINR(C)::QAB1(E),XQ(a)
- Q(a);N_GUARD,N_PINR(C)::R1(C)
- Q(a);N_GUARD::QAB1(E)
- Refutation
- Q(a);CHECK,XR(C)
- Try
- S(D);
- Threat
- QAR1(E)
- Vars
- Q(a);N_GUARD,N_PINR(C)::QAB1(E),XQ(a)
- Q(a);N_GUARD,N_PINR(C)::R1(C)
- Q(a);N_GUARD::QAB1(E)
- Refutation
- Q(a);CHECK,XR(C)
- Try
- S(D);
- Threat
- S(D)
- Vars
- Q(a);N_GUARD,N_PINR(C),XS(D)::R1(C)
- Q(a);N_GUARD,N_PINR(C)::QAB1(E),XQ(a)
- Q(a);N_GUARD,N_PINR(C)::QAB1(E)
- Refutation
- Q(a);CHECK,XR(C)
- Try
- R(C);
- Vars
- Q(a);N_GUARD,N_PINR(C)::QAB1(E),XQ(a)
- Q(a);N_GUARD,N_PINR(C)::R1(C)
- Q(a);N_GUARD::QAB1(E)
- Refutation
- Q(a);CHECK,XR(C)
- Try
- Q(E);CHECK
- Vars
- Q(a);N_GUARD,N_PINR(C),P_SPINQ(a)::QAR2(E),XQ(a)
- Refutation
- K(b);S_FLIGHT
- Try
- Actual
- R(C);
- Vars
- Q(a);CHECK,OGATE,XR(C)::P(A),XQ(a)
- Q(a);N_GUARD,N_PINR(C)::QAB1(E),XQ(a)
- Q(a);N_GUARD,N_PINR(C)::R1(C)
- Q(a);N_GUARD,N_PINR(C)::QAB1(E)
- Q(a);OGATE::P(A),XQ(a)
- Q(a);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).