MESON Chess Problem Database
Problem Display
PID: 276393 (1Q2B3/7r/P1R3N1/1n1k4/KR5r/1PP2P2/N2pq3/8 w - - 0 1)
Hermanson, Halvar
diagrammes, 1979
#2
11 + 6
SOLUTION
- SOUND
- Sets
- 1...Qd1
- 2.Qe5#
- 2.Qxb5#
- 1...Qf1
- 2.Qe5#
- 1...Qd3
- 2.Qe5#
- 1...Qxf3
- 2.Qe5#
- 2.Qxb5#
- 1...Qc4
- 2.Qe5#
- 1...Qe1
- 2.Qxb5#
- 1...Qf2
- 2.Qe5#
- 1...Qg2
- 2.Qe5#
- 2.Qxb5#
- 1...Qh2
- 2.Qxb5#
- 1...Qe4
- 2.Qxb5#
- 1...Qe5
- 2.Qxe5#
- 2.Qxb5#
- 1...Qe6
- 2.Qxb5#
- 1...Qxe8
- 2.Qxb5#
- 1...Rh1
- 2.Sf4#
- 1...Rh2
- 2.Sf4#
- 1...Rh3
- 2.Sf4#
- 1...Rxb4+
- 2.Sxb4#
- 1...Rf4
- 2.Sxf4#
- 1...R4h5
- 2.Sf4#
- 1...R4h6
- 2.Sf4#
- 1...Sa3
- 2.Qd6#
- 1...Sxc3+
- 2.Sxc3#
- 1...Sd4
- 2.Qd6#
- 1...Sd6
- 2.Qxd6#
- 1...Sa7
- 2.Qd6#
- 1...Qd1
- Tries
- 1.Rd4+?
- 1...Sxd4
- 2.Sb4#
- 2.Qd6#
- 1...Rxd4+!
- 1...Sxd4
- 1.Rg4?
- threat
- 2.Sb4#
- 2.Sf4#
- 1...Qc4+
- 2.bxc4#
- 1...Qe4+
- 2.fxe4#
- 1...Sxc3+
- 2.Sxc3#
- 1...Qxf3
- 2.Sb4#
- 2.Qe5#
- 2.Qxb5#
- 2.c4#
- 1...Qxe8
- 2.Sb4#
- 2.Qxb5#
- 1...Rd7
- 2.Sb4#
- 1...Sd6
- 2.Qxd6#
- 1...Qh2
- 2.Sb4#
- 2.Qxb5#
- 2.c4#
- 1...Qe3
- 2.Sb4#
- 2.c4#
- 1...Qe5
- 2.Sb4#
- 2.Qxe5#
- 2.Qxb5#
- 2.c4#
- 1...Qe7
- 2.Sf4#
- 2.c4#
- 1...Rc7
- 2.Sb4#
- 1...Rf7
- 2.Sb4#
- 1...Sc7
- 2.Sb4#
- 1...Rxg4+!
- threat
- 1.Rxh4?
- threat
- 2.Sb4#
- 2.Sf4#
- 1...Qc4+
- 2.bxc4#
- 1...Qe4+
- 2.fxe4#
- 1...Sxc3+
- 2.Sxc3#
- 1...Qxf3
- 2.Sb4#
- 2.Qe5#
- 2.Qxb5#
- 2.c4#
- 1...Qxe8
- 2.Sb4#
- 2.Qxb5#
- 1...Rd7
- 2.Sb4#
- 1...Sd6
- 2.Qxd6#
- 1...Qh2
- 2.Sb4#
- 2.Qxb5#
- 2.c4#
- 1...Qe3
- 2.Sb4#
- 2.c4#
- 1...Qe5
- 2.Sb4#
- 2.Qxe5#
- 2.Qxb5#
- 2.c4#
- 1...Qe7
- 2.Sf4#
- 2.c4#
- 1...Rc7
- 2.Sb4#
- 1...Rf7
- 2.Sb4#
- 1...Sc7
- 2.Sb4#
- 2.Rd4#
- 1...Rxh4+!
- threat
- 1.Rd6+?
- 1...Kc5
- 2.Qb6#
- 1...Sxd6!
- 1...Kc5
- 1.Qd8+?
- 1...Sd6
- 2.Qxd6#
- 1...Rd7!
- 1...Sd6
- 1.Rd4+?
- Keys
- 1.Rf4!
- threat
- 2.Sb4#
- 1...Qc4+
- 2.bxc4#
- 1...Qe4+
- 2.fxe4#
- 1...Rxf4+
- 2.Sxf4#
- 1...Sxc3+
- 2.Sxc3#
- 1...Sd6
- 2.Qxd6#
- 1...Qe7
- 2.c4#
- threat
- 1.Rf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 16
- Sets
- Q(b);N_GUARD::QAR1(J)
- Q(b);N_GUARD::QAR2(J),XS(d)
- Q(b);N_GUARD,XB(K)::QAR2(J),XS(d)
- R(c);N_GUARD,N_PINR(F)::S(I)
- R(c);CHECK,XR(F)::S(A),XR(c)
- R(c);N_GUARD::S(I),XR(c)
- S(d);N_GUARD::QAR1(J)
- S(d);CHECK,XP(C)::S(A),XS(d)
- S(d);N_GUARD,N_PINR(F)::QAR1(J)
- S(d);N_GUARD::QAR1(J),XS(d)
- Tries
- Try
- R(F);CHECK
- Refutation
- R(c);CHECK,XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,N_PINR(F),OGATE::P(B),XQ(b)
- Q(b);CHECK,N_PINR(F),OGATE::P(D),XQ(b)
- S(d);CHECK,XP(C)::S(A),XS(d)
- R(f);::S(A)
- S(d);N_GUARD::QAR1(J),XS(d)
- S(d);::S(A)
- Refutation
- R(c);CHECK,XR(F)
- Try
- R(F);N_SPINR(F),XR(c)
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,OGATE::P(B),XQ(b)
- Q(b);CHECK,OGATE::P(D),XQ(b)
- S(d);CHECK,XP(C)::S(A),XS(d)
- R(f);::S(A)
- S(d);N_GUARD::QAR1(J),XS(d)
- Refutation
- R(f);CHECK,XR(F)
- Try
- R(H);CHECK
- Vars
- K(e);P-FLIGHT,S_CUTS(d)::QAB1(J)
- Refutation
- S(d);XR(H)
- Try
- Q(J);CHECK
- Vars
- S(d);N_GUARD,P_SPINS(d)::QAR1(J),XS(d)
- Refutation
- R(f);P_SPINR(f)
- Try
- Actual
- R(F);
- Threat
- S(A)
- Vars
- Q(b);CHECK,N_PINR(F),OGATE::P(B),XQ(b)
- Q(b);CHECK,N_PINR(F),OGATE::P(D),XQ(b)
- R(c);CHECK,XR(F)::S(I),XR(c)
- S(d);CHECK,XP(C)::S(A),XS(d)
- S(d);N_GUARD::QAR1(J),XS(d)
- Q(b);N_GUARD::P(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).