MESON Chess Problem Database
Problem Display
PID: 10710 (NK2n3/B2R4/k1P1B3/7r/1PP2p2/N4p2/6r1/R6q w - - 0 1)
Froberg, Johan Hilding Laurentius
Probleemblad, 1967
#2
10 + 7
SOLUTION
- SOUND
- Sets
- 1...Rb5+
- 2.cxb5#
- 1...Sd6
- 2.Sc7#
- 1...Sf6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...Rb5+
- Tries
- 1.Sb1+?
- 1...Ra5
- 2.Rxa5#
- 2.b5#
- 1...Ra2!
- 1...Ra5
- 1.Sc2+?
- 1...Ra5
- 2.Rxa5#
- 2.b5#
- 1...Qxa1!
- 1...Ra5
- 1.Sb5+?
- 1...Ra2
- 2.Rxa2#
- 1...Qxa1!
- 1...Ra2
- 1.Bg1?
- threat
- 2.Ra7#
- 1...Rb5+
- 2.cxb5#
- 1...Rg7
- 2.Sb5#
- 1...Rh7
- 2.Sc2#
- 1...Sc7
- 2.Sxc7#
- 1...Qxg1!
- threat
- 1.Bf2?
- threat
- 2.Ra7#
- 1...Rb5+
- 2.cxb5#
- 1...Rh7
- 2.Sb1#
- 1...Sc7
- 2.Sxc7#
- 1...Rg7!
- threat
- 1.Bc5?
- threat
- 2.Ra7#
- 1...Rg7
- 2.Sb1#
- 1...Sc7
- 2.Sxc7#
- 1...Rh7!
- threat
- 1.Rdd1?
- threat
- 2.Bc8#
- 1...Rb5+
- 2.cxb5#
- 1...Rg7
- 2.Sb5#
- 1...Rh7
- 2.Sc2#
- 1...Sd6
- 2.Sc7#
- 1...Qh3!
- threat
- 1.Rd2?
- threat
- 2.Bc8#
- 1...Rb5+
- 2.cxb5#
- 1...Qh3
- 2.Sb5#
- 1...Rh7
- 2.Sb1#
- 1...Sd6
- 2.Sc7#
- 1...Rg7!
- threat
- 1.Rb7?
- threat
- 2.Rb6#
- 1...Rb5
- 2.cxb5#
- 1...Qg1!
- threat
- 1.Re7?
- threat
- 2.Bc8#
- 1...Rb5+
- 2.cxb5#
- 1...Sd6
- 2.Sc7#
- 1...Qh3!
- threat
- 1.Rf7?
- threat
- 2.Bc8#
- 1...Rb5+
- 2.cxb5#
- 1...Sd6
- 2.Sc7#
- 1...Qh3!
- threat
- 1.c7?
- threat
- 2.c8Q#
- 2.c8B#
- 1...Rb5+
- 2.cxb5#
- 1...Qxa1
- 2.c8Q#
- 2.c8B#
- 1...Sxc7
- 2.Sxc7#
- 2.Rd6#
- 1...Rg7
- 2.c8Q#
- 2.c8B#
- 1...Qb1
- 2.c8Q#
- 2.c8B#
- 1...Qc1
- 2.c8Q#
- 2.c8B#
- 1...Qd1
- 2.c8Q#
- 2.c8B#
- 1...Qe1
- 2.c8Q#
- 2.c8B#
- 1...Qf1
- 2.c8Q#
- 2.c8B#
- 1...Qg1
- 2.c8Q#
- 2.c8B#
- 1...Qh2
- 2.c8Q#
- 2.c8B#
- 1...Qh3
- 2.c8Q#
- 2.c8B#
- 1...Qh4
- 2.c8Q#
- 2.c8B#
- 1...Rg1
- 2.c8Q#
- 2.c8B#
- 1...Ra2
- 2.c8Q#
- 2.c8B#
- 1...Rb2
- 2.c8Q#
- 2.c8B#
- 1...Rc2
- 2.c8Q#
- 2.c8B#
- 1...Rd2
- 2.c8Q#
- 2.c8B#
- 1...Re2
- 2.c8Q#
- 2.c8B#
- 1...Rf2
- 2.c8Q#
- 2.c8B#
- 1...Rgh2
- 2.c8Q#
- 2.c8B#
- 1...Rg3
- 2.c8Q#
- 2.c8B#
- 1...Rg4
- 2.c8Q#
- 2.c8B#
- 1...Rgg5
- 2.c8Q#
- 2.c8B#
- 1...Rg6
- 2.c8Q#
- 2.c8B#
- 1...Rg8
- 2.c8Q#
- 2.c8B#
- 1...Rhh2
- 2.c8Q#
- 2.c8B#
- 1...Rh3
- 2.c8Q#
- 2.c8B#
- 1...Rh4
- 2.c8Q#
- 2.c8B#
- 1...Ra5
- 2.c8Q#
- 2.c8B#
- 1...Rd5
- 2.c8Q#
- 2.c8B#
- 1...Re5
- 2.c8Q#
- 2.c8B#
- 1...Rf5
- 2.c8Q#
- 2.c8B#
- 1...Rhg5
- 2.c8Q#
- 2.c8B#
- 1...Rh6
- 2.c8Q#
- 2.c8B#
- 1...Rh7
- 2.c8Q#
- 2.c8B#
- 1...Rh8
- 2.c8Q#
- 2.c8B#
- 1...Sd6
- 2.Rxd6#
- 1...Sf6
- 2.Rd6#
- 2.c8Q#
- 2.c8B#
- 1...Sg7
- 2.Rd6#
- 2.c8Q#
- 2.c8B#
- 1...f2
- 2.c8Q#
- 2.c8B#
- 1...Rc5!
- threat
- 1.Sb1+?
- Keys
- 1.Rd5!
- threat
- 2.Bc8#
- 1...Rg7
- 2.Sb1#
- 1...Qh3
- 2.Sc2#
- 1...Rh7
- 2.Ra5#
- 1...Sd6
- 2.Sc7#
- threat
- 1.Rd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- R(e);CHECK,OGATE::P(D),XR(e)
- S(g);N_GUARD::S(I)
- S(g);N_GUARD::S(I),XS(g)
- Tries
- Try
- S(B);CHECK
- Refutation
- R(b);P_SPINR(b)
- Try
- S(B);CHECK
- Refutation
- Q(a);XR(A)
- Try
- S(B);CHECK
- Vars
- R(b);N_GUARD,P_SPINR(b)::R(A),XR(b)
- Refutation
- Q(a);XR(A)
- Try
- B(G);
- Threat
- R1(H)
- Vars
- R(e);CHECK,OGATE::P(D),XR(e)
- R(b);N_GUARD::R(A)+S(B)
- R(e);N_GUARD::R(A)+S(B)
- S(g);N_GUARD::S(I),XS(g)
- Refutation
- Q(a);XB(G)
- Try
- B(G);
- Threat
- R1(H)
- Vars
- R(e);CHECK,OGATE::P(D),XR(e)
- R(e);N_GUARD::R(A)+S(B)
- S(g);N_GUARD::S(I),XS(g)
- Refutation
- R(b);
- Try
- B(G);
- Threat
- R1(H)
- Vars
- R(b);N_GUARD::R(A)+S(B)
- S(g);N_GUARD::S(I),XS(g)
- Refutation
- R(e);
- Try
- R(H);
- Threat
- B(F)
- Vars
- R(e);CHECK,OGATE::P(D),XR(e)
- R(b);N_GUARD::R(A)+S(B)
- R(e);N_GUARD::R(A)+S(B)
- S(g);N_GUARD::S(I)
- Refutation
- Q(a);
- Try
- R(H);
- Threat
- B(F)
- Vars
- R(e);CHECK,OGATE::P(D),XR(e)
- Q(a);N_GUARD::R(A)+S(B)
- R(e);N_GUARD::R(A)+S(B)
- S(g);N_GUARD::S(I)
- Refutation
- R(b);
- Try
- R(H);
- Threat
- R1(H)
- Vars
- R(e);OGATE,P_PINR(H)::P(D),XR(e)
- Refutation
- Q(a);
- Try
- R(H);
- Threat
- B(F)
- Vars
- R(e);CHECK,OGATE::P(D),XR(e)
- S(g);N_GUARD::S(I)
- Refutation
- Q(a);
- Try
- R(H);
- Threat
- B(F)
- Vars
- R(e);CHECK,OGATE::P(D),XR(e)
- S(g);N_GUARD::S(I)
- Refutation
- Q(a);
- Try
- P(E);
- Threat
- P=Q
- Vars
- R(e);CHECK,OGATE::P(D),XR(e)
- Q(a);XR(A)::P=Q
- R(b);::P=Q
- Q(a);P_PINP(C)::P=Q
- Q(a);::P=Q
- Q(a);SBLOCK::P=Q
- R(b);P_PINP(C)::P=Q
- R(e);::P=Q
- R(e);SBLOCK::P=Q
- S(g);N_GUARD::R(H),XS(g)
- P(c);::P=Q
- Refutation
- R(e);
- Try
- Actual
- R(H);
- Threat
- B(F)
- Vars
- R(b);N_GUARD::R(A)+S(B)
- Q(a);N_GUARD::R(A)+S(B)
- R(e);N_GUARD::R1(H)
- S(g);N_GUARD::S(I)
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).