MESON Chess Problem Database
Problem Display
PID: 238093 (8/1N2p3/R1R1K3/1p4p1/PkP5/6Q1/1P6/1n6 w - - 0 1)
Hermanson, Halvar
Schweizerische Arbeiter Schachzeitung, 1954
#2
8 + 5
| 15148 | Sadier Collection | 2021 |
| 5454 | Near Snap | 2022 |
SOLUTION
- SOUND
- Sets
- 1...Sd2
- 2.Qa3#
- 2.Qc3#
- 1...Sa3
- 2.Qxa3#
- 2.Qc3#
- 2.bxa3#
- 1...Sc3
- 2.Qxc3#
- 1...bxa4
- 2.Rab6#
- 1...bxc4
- 2.Rcb6#
- 1...Sd2
- Tries
- 1.Kxe7?
- 1...bxa4
- 2.Rab6#
- 1...bxc4
- 2.Rcb6#
- 1...Sc3
- 2.Qxc3#
- 1...Sd2
- 2.Qa3#
- 2.Qc3#
- 1...Sa3
- 2.Qxa3#
- 2.Qc3#
- 2.bxa3#
- 1...g4!
- 1...bxa4
- 1.Sa5?
- threat
- 2.Qb3#
- 1...Kxa4
- 2.Qb3#
- 1...bxa4
- 2.Qb8#
- 1...bxc4
- 2.Rxc4#
- 1...Sd2
- 2.Qa3#
- 1...Sc3!
- threat
- 1.Sd8?
- 1...bxa4
- 2.Qb8#
- 1...bxc4
- 2.Qb8#
- 1...Sc3
- 2.Qxc3#
- 1...Sd2
- 2.Qa3#
- 2.Qc3#
- 1...Sa3
- 2.Qxa3#
- 2.Qc3#
- 2.bxa3#
- 1...g4!
- 1...bxa4
- 1.Ra5?
- 1...bxa4
- 2.Rb5#
- 1...bxc4
- 2.Rb6#
- 1...Sc3
- 2.Qxc3#
- 1...Sd2
- 2.Qa3#
- 2.Qc3#
- 1...Sa3
- 2.Qxa3#
- 2.Qc3#
- 2.bxa3#
- 1...g4!
- 1...bxa4
- 1.Rc5?
- 1...bxa4
- 2.Rb6#
- 1...bxc4
- 2.Rb5#
- 1...Sc3
- 2.Qxc3#
- 1...Sd2
- 2.Qa3#
- 2.Qc3#
- 1...Sa3
- 2.Qxa3#
- 2.Qc3#
- 2.bxa3#
- 1...g4!
- 1...bxa4
- 1.Qe5?
- threat
- 2.Qxb5#
- 1...bxa4
- 2.Rab6#
- 2.Qb5#
- 1...bxc4
- 2.Rcb6#
- 2.Qb5#
- 1...Sa3
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Kb3!
- threat
- 1.Qd3?
- 1...bxa4
- 2.Rab6#
- 2.Rcb6#
- 1...bxc4
- 2.Rxc4#
- 2.Rcb6#
- 2.Qxc4#
- 1...Sc3
- 2.Qxc3#
- 1...Sd2
- 2.Qa3#
- 2.Qc3#
- 1...Sa3
- 2.Qxa3#
- 2.Qc3#
- 2.bxa3#
- 1...g4!
- 1...bxa4
- 1.Qe3?
- 1...bxa4
- 2.Rab6#
- 2.Qb6#
- 1...bxc4
- 2.Rcb6#
- 2.Qb6#
- 1...Sc3
- 2.Qxc3#
- 1...Sd2
- 2.Qa3#
- 2.Qc3#
- 1...Sa3
- 2.Qxa3#
- 2.Qc3#
- 2.bxa3#
- 1...g4!
- 1...bxa4
- 1.Qf3?
- 1...bxa4
- 2.Rab6#
- 1...bxc4
- 2.Rcb6#
- 1...Sc3
- 2.Qxc3#
- 1...Sd2
- 2.Qa3#
- 2.Qc3#
- 1...Sa3
- 2.Qxa3#
- 2.Qc3#
- 2.bxa3#
- 1...g4!
- 1...bxa4
- 1.Qh3?
- 1...bxa4
- 2.Rab6#
- 1...bxc4
- 2.Rcb6#
- 1...Sc3
- 2.Qxc3#
- 1...Sd2
- 2.Qa3#
- 2.Qc3#
- 1...Sa3
- 2.Qxa3#
- 2.Qc3#
- 2.bxa3#
- 1...g4!
- 1...bxa4
- 1.axb5?
- 1...Sc3
- 2.Qxc3#
- 1...Sd2
- 2.Qa3#
- 2.Qc3#
- 1...Sa3
- 2.Qxa3#
- 2.Qc3#
- 2.bxa3#
- 1...g4!
- 1...Sc3
- 1.cxb5?
- 1...Sc3
- 2.Qxc3#
- 1...Sd2
- 2.Qa3#
- 2.Qc3#
- 1...Sa3
- 2.Qxa3#
- 2.Qc3#
- 2.bxa3#
- 1...g4!
- 1...Sc3
- 1.Kxe7?
- Keys
- 1.Sc5!
- threat
- 2.Qb3#
- 1...Kxc4
- 2.Qg4#
- 1...bxa4
- 2.Rxa4#
- 1...bxc4
- 2.Qb8#
- 1...Sd2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- threat
- 1.Sc5!
This anticipates 84796(1987)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- S(a);N_GUARD::QAB1(B),XS(a)
- P(c);OGATEB,SBLOCK,XP(C)::R(E)
- P(c);OGATEB,SBLOCK,XP(D)::R(F)
- Tries
- Try
- K(G);P-FLIGHT,XP(e)
- Vars
- P(c);OGATEB,SBLOCK,XP(C)::R(E)
- P(c);OGATEB,SBLOCK,XP(D)::R(F)
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(d);
- Try
- S(H);
- Threat
- QAR1(B)
- Vars
- K(b);P-FLIGHT,XP(C)::QAB1(B)
- P(c);OGATEB,SBLOCK,XP(C)::QAR(B)
- P(c);OGATE,XP(D)::R1(F),XP(c)
- S(a);N_GUARD::QAB1(B)
- Refutation
- S(a);
- Try
- S(H);
- Vars
- P(c);OGATEB,XP(C)::QAR(B)
- P(c);OGATEB,XP(D)::QAR(B)
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(d);
- Try
- R(E);
- Vars
- P(c);SBLOCK,XP(C)::R1(E)
- P(c);OGATEB,SBLOCK,XP(D)::R(F)
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(d);
- Try
- R(F);
- Vars
- P(c);OGATEB,SBLOCK,XP(C)::R(E)
- P(c);SBLOCK,XP(D)::R1(F)
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(d);
- Try
- Q(B);
- Threat
- QAR1(B),XP(c)
- Vars
- S(a);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- K(b);P-FLIGHT
- Try
- Q(B);
- Vars
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(d);
- Try
- Q(B);
- Vars
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(d);
- Try
- Q(B);
- Vars
- P(c);OGATEB,SBLOCK,XP(C)::R(E)
- P(c);OGATEB,SBLOCK,XP(D)::R(F)
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(d);
- Try
- Q(B);
- Vars
- P(c);OGATEB,SBLOCK,XP(C)::R(E)
- P(c);OGATEB,SBLOCK,XP(D)::R(F)
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(d);
- Try
- P(C);XP(c)
- Vars
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(d);
- Try
- P(D);XP(c)
- Vars
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(d);
- Try
- Actual
- S(H);
- Threat
- QAR1(B)
- Vars
- K(b);OGATEB,P-FLIGHT,XP(D)::QAR(B)
- P(c);OGATE,XP(C)::R1(E),XP(c)
- P(c);OGATEB,SBLOCK,XP(D)::QAR(B)
- S(a);N_GUARD::QAB1(B)
- S(a);N_GUARD::QAB1(B),XS(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).