MESON Chess Problem Database
Problem Display
PID: 238078 (8/8/r5p1/1r3kN1/5pNK/7p/5n1B/4Q3 w - - 0 1)
Hermanson, Halvar
Norsk Sjakkblad, 1951
#2
5 + 7
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Qe5#
- 1...Rb2
- 2.Qe5#
- 1...Rb3
- 2.Qe5#
- 1...Rb4
- 2.Qe5#
- 1...Re5
- 2.Qxe5#
- 1...Rbb6
- 2.Qe5#
- 1...Rb7
- 2.Qe5#
- 1...Rb8
- 2.Qe5#
- 1...Ra1
- 2.Qe6#
- 1...Ra2
- 2.Qe6#
- 1...Ra3
- 2.Qe6#
- 1...Ra4
- 2.Qe6#
- 1...Ra5
- 2.Qe6#
- 1...Re6
- 2.Qxe6#
- 1...Rf6
- 2.Sh6#
- 1...Ra7
- 2.Qe6#
- 1...Ra8
- 2.Qe6#
- 1...Sd1
- 2.Qe4#
- 1...Sh1
- 2.Qe4#
- 1...Sd3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Rb1
- Tries
- 1.Qxf2?
- threat
- 2.Qc2#
- 2.Qxf4#
- 1...Rb2
- 2.Qc5#
- 2.Qxf4#
- 1...Rb3
- 2.Qc5#
- 2.Qxf4#
- 1...Rb4
- 2.Qc5#
- 1...Rc5
- 2.Qxc5#
- 2.Qxf4#
- 1...Rd5
- 2.Qxf4#
- 1...Re5
- 2.Qxf4#
- 1...Ra2
- 2.Qxf4#
- 1...Ra3
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...f3
- 2.Qc2#
- 2.Qxf3#
- 1...Ra4!
- threat
- 1.Qc3?
- threat
- 2.Sh6#
- 1...Re5
- 2.Qxe5#
- 1...Sxg4!
- threat
- 1.Qb4?
- threat
- 2.Qxf4#
- 2.Qxb5#
- 1...Sxg4
- 2.Qxf4#
- 1...Rba5
- 2.Qxf4#
- 1...Rc5
- 2.Qxc5#
- 2.Qxf4#
- 1...Rd5
- 2.Qxf4#
- 1...Re5
- 2.Qxf4#
- 1...Rbb6
- 2.Qc5#
- 2.Qxf4#
- 1...Rb7
- 2.Qc5#
- 2.Qxf4#
- 1...Rb8
- 2.Qc5#
- 2.Qxf4#
- 1...Ra4
- 2.Qf8#
- 2.Qxb5#
- 1...Raa5
- 2.Qf8#
- 2.Qxf4#
- 1...Rab6
- 2.Qxf4#
- 1...Rc6
- 2.Qxf4#
- 1...Rd6
- 2.Qxf4#
- 1...Re6
- 2.Qxf4#
- 1...Sd3
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...f3
- 2.Qf4#
- 2.Qxb5#
- 1...Rxb4!
- threat
- 1.Qb1+?
- 1...Sd3
- 2.Qxd3#
- 1...Se4
- 2.Qxe4#
- 1...Rxb1!
- 1...Sd3
- 1.Qc1?
- threat
- 2.Qxf4#
- 1...Rb4
- 2.Qc5#
- 1...Ra4
- 2.Qc8#
- 1...f3
- 2.Qf4#
- 1...Sd3!
- threat
- 1.Qe3?
- threat
- 2.Qxf4#
- 1...Rb4
- 2.Qc5#
- 2.Qe5#
- 1...Ra4
- 2.Qe6#
- 1...Sd3
- 2.Qxd3#
- 2.Qe4#
- 1...f3
- 2.Qf4#
- 2.Qxf3#
- 1...fxe3!
- threat
- 1.Qe7?
- threat
- 2.Sh6#
- 1...Re6
- 2.Qxe6#
- 1...Sxg4!
- threat
- 1.Qxf2?
- Keys
- 1.Qd2!
- threat
- 2.Qxf4#
- 1...Rb4
- 2.Qd5#
- 1...Ra4
- 2.Qd7#
- 1...Sd3
- 2.Qxd3#
- 1...f3
- 2.Qf4#
- threat
- 1.Qd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 18
- Sets
- R(d);N_GUARD::QAR1(A)
- R(d);N_GUARD::QAR1(A),XR(d)
- R(f);N_GUARD::QAB1(A)
- R(f);N_GUARD::QAB1(A),XR(f)
- R(f);SBLOCK::S(C)
- S(a);N_GUARD::QAB1(A)
- S(a);N_GUARD::QAB1(A),XS(a)
- Tries
- Try
- Q(A);P_PINP(c),XS(a)
- Threat
- DUALS(2)
- Vars
- R(d);N_GUARD::QAR(A)
- R(d);::QAR1(A),XP(c)
- R(f);::QAR1(A),XP(c)
- Refutation
- R(f);
- Try
- Q(A);
- Threat
- S(C)
- Vars
- R(d);N_GUARD::QAR1(A),XR(d)
- Refutation
- S(a);XS(C)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(a);XS(C)::QAR1(A),XP(c)
- R(d);::QAR1(A),XP(c)
- R(f);::QAR1(A),XP(c)
- S(a);N_GUARD::QAB1(A)
- S(a);N_GUARD::QAB1(A),XS(a)
- Refutation
- R(d);XQ(A)
- Try
- Q(A);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB(A),XS(a)
- S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
- Refutation
- R(d);XQ(A)
- Try
- Q(A);
- Threat
- QAR1(A),XP(c)
- Vars
- R(d);N_GUARD::QAR(A)
- R(f);N_GUARD::QAB(A)
- P(c);::QAR1(A)
- Refutation
- S(a);
- Try
- Q(A);
- Threat
- QAR1(A),XP(c)
- Vars
- R(f);N_GUARD::QAB1(A)
- Refutation
- P(c);XQ(A)
- Try
- Q(A);
- Threat
- S(C)
- Vars
- R(f);N_GUARD::QAB1(A),XR(f)
- Refutation
- S(a);XS(C)
- Try
- Actual
- Q(A);
- Threat
- QAR1(A),XP(c)
- Vars
- R(d);N_GUARD::QAR2(A)
- R(f);N_GUARD::QAB(A)
- S(a);N_GUARD::QAB(A),XS(a)
- P(c);::QAR1(A)
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).