MESON Chess Problem Database
Problem Display
PID: 245124 (K7/4P3/2p5/2Qp4/6R1/4rk2/6R1/8 w - - 0 1)
Hermanson, Halvar
Schackvarlden, 1931
#2
5 + 4
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Re1
- 2.Qf2#
- 1...Re2
- 2.R2g3#
- 1...Ra3+
- 2.Qxa3#
- 1...Rb3
- 2.Qf2#
- 1...Rc3
- 2.Qf2#
- 2.Qxc3#
- 1...Rd3
- 2.Qf2#
- 1...Re4
- 2.Qf2#
- 1...Re5
- 2.Qf2#
- 1...Re6
- 2.Qf2#
- 1...Rxe7
- 2.Qf2#
- 1...d4
- 2.Qf5#
- 1...Re1
- Tries
- 1.Ka7?
- 1...Ra3+
- 2.Qxa3#
- 1...Re1
- 2.Qf2#
- 1...Re2
- 2.R2g3#
- 1...Rb3
- 2.Qf2#
- 1...Rc3
- 2.Qf2#
- 2.Qxc3#
- 1...Rd3
- 2.Qf2#
- 1...Re4
- 2.Qf2#
- 1...Re5
- 2.Qf2#
- 1...Re6
- 2.Qf2#
- 1...d4
- 2.Qf5#
- 1...Rxe7+!
- 1...Ra3+
- 1.Kb8?
- 1...Rxe7
- 2.Qf2#
- 1...Re1
- 2.Qf2#
- 1...Re2
- 2.R2g3#
- 1...Ra3
- 2.Qf2#
- 2.Qxa3#
- 1...Rc3
- 2.Qf2#
- 2.Qxc3#
- 1...Rd3
- 2.Qf2#
- 1...Re4
- 2.Qf2#
- 1...Re5
- 2.Qf2#
- 1...Re6
- 2.Qf2#
- 1...d4
- 2.Qf5#
- 1...Rb3+!
- 1...Rxe7
- 1.Qd4?
- threat
- 2.R4g3#
- 2.Qf6#
- 2.Qf4#
- 1...Rxe7
- 2.Rf2#
- 2.R4g3#
- 2.Qf2#
- 2.Qf4#
- 1...Re1
- 2.Rf2#
- 2.R4g3#
- 2.Qf2#
- 2.Qf4#
- 1...Re2
- 2.R2g3#
- 2.R4g3#
- 2.Qf4#
- 1...Rb3
- 2.Rf2#
- 2.R4g3#
- 2.Qf2#
- 2.Qf4#
- 1...Rc3
- 2.Rf2#
- 2.R4g3#
- 2.Qf2#
- 2.Qxc3#
- 2.Qf4#
- 1...Rd3
- 2.Rf2#
- 2.R4g3#
- 2.Qf2#
- 2.Qxd3#
- 2.Qf4#
- 1...Re4
- 2.Qf2#
- 1...Re5
- 2.Rf2#
- 2.R4g3#
- 2.Qf2#
- 2.Qf4#
- 1...Re6
- 2.Rf2#
- 2.R4g3#
- 2.Qf2#
- 2.Qf4#
- 1...Ra3+!
- threat
- 1.Qd6?
- threat
- 2.Qg3#
- 2.Qf4#
- 2.Qf6#
- 1...Ra3+
- 2.Qxa3#
- 1...Rxe7
- 2.Qg3#
- 2.Qf4#
- 1...Re1
- 2.Qg3#
- 2.Qf4#
- 1...Re2
- 2.Qg3#
- 2.Qf4#
- 1...Rb3
- 2.Qg3#
- 2.Qf4#
- 1...Rc3
- 2.Qg3#
- 2.Qf4#
- 1...Rd3
- 2.Qg3#
- 2.Qf4#
- 1...Re4
- 2.R4g3#
- 2.Qg3#
- 1...Re6
- 2.Qg3#
- 2.Qf4#
- 1...Re5!
- threat
- 1.Qc2?
- threat
- 2.R2g3#
- 2.Qf5#
- 2.Qf2#
- 1...Rxe7
- 2.R2g3#
- 2.Qf2#
- 1...Re1
- 2.R2g3#
- 2.Qf2#
- 1...Re2
- 2.Qxe2#
- 1...Rb3
- 2.R2g3#
- 2.Qxb3#
- 2.Qe2#
- 2.Qf2#
- 1...Rc3
- 2.R2g3#
- 2.Qe2#
- 2.Qf2#
- 2.Qxc3#
- 1...Rd3
- 2.R2g3#
- 2.Qxd3#
- 2.Qe2#
- 2.Qf2#
- 1...Re4
- 2.R2g3#
- 2.Qf2#
- 1...Re5
- 2.R2g3#
- 2.Qf2#
- 1...Re6
- 2.R2g3#
- 2.Qf2#
- 1...Ra3+!
- threat
- 1.Qxd5+?
- 1...Re4
- 2.Qxe4#
- 1...cxd5!
- 1...Re4
- 1.e8Q?
- threat
- 2.Qcxe3#
- 2.Qcf8#
- 2.Qf7#
- 2.Qexe3#
- 2.Qef8#
- 1...Ra3+
- 2.Qxa3#
- 1...d4
- 2.Qcf8#
- 2.Qf7#
- 2.Qf5#
- 2.Qef8#
- 1...Re1
- 2.R2g3#
- 2.Qf2#
- 2.Qcf8#
- 2.Qf7#
- 2.Qef8#
- 1...Re2
- 2.R2g3#
- 2.Qcf8#
- 2.Qf7#
- 2.Qxe2#
- 2.Qef8#
- 1...Rb3
- 2.R2g3#
- 2.Qf2#
- 2.Qcf8#
- 2.Qf7#
- 2.Qe2#
- 2.Qef8#
- 1...Rc3
- 2.R2g3#
- 2.Qf2#
- 2.Qcf8#
- 2.Qf7#
- 2.Qxc3#
- 2.Qe2#
- 2.Qef8#
- 1...Rd3
- 2.R2g3#
- 2.Qf2#
- 2.Qcf8#
- 2.Qf7#
- 2.Qe2#
- 2.Qef8#
- 1...Re4
- 2.Qf2#
- 1...Re5
- 2.Qf2#
- 1...Re6
- 2.Qf2#
- 1...Re7
- 2.Qf2#
- 1...Rxe8+!
- threat
- 1.e8S?
- threat
- 2.Qf8#
- 1...Ra3+
- 2.Qxa3#
- 1...Re1
- 2.Qf2#
- 1...Re2
- 2.R2g3#
- 1...Rb3
- 2.Qf2#
- 1...Rc3
- 2.Qf2#
- 2.Qxc3#
- 1...Rd3
- 2.Qf2#
- 1...Re4
- 2.Qf2#
- 1...Re5
- 2.Qf2#
- 1...Re6
- 2.Qf2#
- 1...Re7
- 2.Qf2#
- 1...Rxe8+!
- threat
- 1.e8B?
- threat
- 2.Qf8#
- 1...Ra3+
- 2.Qxa3#
- 1...Re1
- 2.Qf2#
- 1...Re2
- 2.R2g3#
- 1...Rb3
- 2.Qf2#
- 1...Rc3
- 2.Qf2#
- 2.Qxc3#
- 1...Rd3
- 2.Qf2#
- 1...Re4
- 2.Qf2#
- 1...Re5
- 2.Qf2#
- 1...Re6
- 2.Qf2#
- 1...Re7
- 2.Qf2#
- 1...Rxe8+!
- threat
- 1.e8R?
- threat
- 2.Rxe3#
- 2.Rf8#
- 2.Qxe3#
- 2.Qf8#
- 1...Ra3+
- 2.Qxa3#
- 1...d4
- 2.Rf8#
- 2.Qf8#
- 2.Qf5#
- 1...Re1
- 2.R2g3#
- 2.Rf8#
- 2.Qf2#
- 2.Qf8#
- 1...Re2
- 2.R2g3#
- 2.Rf8#
- 2.Qf8#
- 1...Rb3
- 2.R2g3#
- 2.Rf8#
- 2.Qf2#
- 2.Qf8#
- 1...Rc3
- 2.R2g3#
- 2.Rf8#
- 2.Qf2#
- 2.Qf8#
- 2.Qxc3#
- 1...Rd3
- 2.R2g3#
- 2.Rf8#
- 2.Qf2#
- 2.Qf8#
- 1...Re4
- 2.Qf2#
- 1...Re5
- 2.Qf2#
- 1...Re6
- 2.Qf2#
- 1...Re7
- 2.Qf2#
- 1...Rxe8+!
- threat
- 1.Ka7?
- Keys
- 1.Qc1!
- threat
- 2.Qf1#
- 1...Ra3+
- 2.Qxa3#
- 1...Rxe7
- 2.Qf4#
- 1...Re1
- 2.Qf4#
- 1...Re2
- 2.Qf4#
- 1...Rb3
- 2.Qf4#
- 1...Rc3
- 2.Qf4#
- 2.Qxc3#
- 1...Rd3
- 2.Qf4#
- 1...Re4
- 2.R4g3#
- 1...Re5
- 2.Qf4#
- 1...Re6
- 2.Qf4#
- threat
- 1.Qc1!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 8
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- R(a);OGATE::QAR1(C)
- R(a);SBLOCK::R1(A)
- R(a);CHECK,OGATEB::QAR(C),XR(a)
- R(a);OGATE,XP(D)::QAR1(C)
- P(c);OGATE::QAR2(C)
- Tries
- Try
- K(E);P-FLIGHT
- Vars
- R(a);CHECK,OGATEB::QAR(C),XR(a)
- R(a);OGATE::QAR1(C)
- R(a);SBLOCK::R1(A)
- P(c);OGATE::QAR2(C)
- Refutation
- R(a);CHECK,XP(D)
- Try
- K(E);P-FLIGHT
- Vars
- R(a);OGATE,XP(D)::QAR1(C)
- R(a);OGATE::QAR1(C)
- R(a);SBLOCK::R1(A)
- P(c);OGATE::QAR2(C)
- Refutation
- R(a);CHECK
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- R(a);OGATE::QAR1(C)
- Refutation
- R(a);CHECK
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- R(a);CHECK,OGATEB::QAR(C),XR(a)
- Refutation
- R(a);
- Try
- Q(C);
- Threat
- DUALS(3)
- Vars
- R(a);N_GUARD::QAB1(C),XR(a)
- Refutation
- R(a);CHECK
- Try
- Q(C);CHECK,XP(c)
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAB1(C),XR(a)
- Refutation
- P(d);XQ(C)
- Try
- P(D);
- Threat
- DUALS(5)
- Vars
- R(a);CHECK,OGATEB::QAR(C),XR(a)
- R(a);OGATE::QAR1(C)
- Refutation
- R(a);CHECK,XQ(D)
- Try
- P(D);
- Threat
- QAR(C)
- Vars
- R(a);CHECK,OGATEB::QAR(C),XR(a)
- R(a);OGATE::QAR1(C)
- R(a);SBLOCK::R1(A)
- Refutation
- R(a);CHECK,XS(D)
- Try
- P(D);
- Threat
- QAR(C)
- Vars
- R(a);CHECK,OGATEB::QAR(C),XR(a)
- R(a);OGATE::QAR1(C)
- R(a);SBLOCK::R1(A)
- Refutation
- R(a);CHECK,XB(D)
- Try
- P(D);
- Threat
- DUALS(4)
- Vars
- R(a);CHECK,OGATEB::QAR(C),XR(a)
- R(a);OGATE::QAR1(C)
- Refutation
- R(a);CHECK,XR(D)
- Try
- Actual
- Q(C);
- Threat
- QAR2(C)
- Vars
- R(a);CHECK,OGATEB::QAR(C),XR(a)
- R(a);OGATE,XP(D)::QAR1(C)
- R(a);OGATE::QAR1(C)
- R(a);SBLOCK::R1(B)
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).