MESON Chess Problem Database
Problem Display
PID: 240 (1Q2B3/2n1r1N1/p7/K2N3R/1pP1kB1b/4P3/4P3/1n4r1 w - - 0 1)
Froberg, Johan Hilding Laurentius
Jonsson, Gustav
Springaren, 1950
#2
10 + 8
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Bg6#
- 1...Rd1
- 2.Bg6#
- 1...Re1
- 2.Bg6#
- 1...Rf1
- 2.Bg6#
- 1...Rh1
- 2.Bg6#
- 1...Rg6
- 2.Bxg6#
- 1...Re5
- 2.Rxe5#
- 1...Rd7
- 2.Re5#
- 1...Rf7
- 2.Re5#
- 1...Rxg7
- 2.Re5#
- 1...Be1
- 2.Sf6#
- 1...Bf2
- 2.Sf6#
- 1...Bg3
- 2.Sf6#
- 2.Bg6#
- 1...Bg5
- 2.Bg6#
- 1...Bf6
- 2.Sxf6#
- 1...Se6
- 2.Re5#
- 2.Qe5#
- 1...Rc1
- Tries
- 1.Bc6?
- threat
- 2.Sc3#
- 2.Sf6#
- 2.Sxc7#
- 1...Sxd5
- 2.Bxd5#
- 1...Rd1
- 2.Sc3#
- 2.Sf6#
- 1...Rg6
- 2.Sc3#
- 2.Sf6#
- 1...Re5
- 2.Rxe5#
- 1...Re6
- 2.Sc3#
- 2.Sf6#
- 1...Rd7
- 2.Sc3#
- 2.Sf6#
- 2.Re5#
- 1...Bf6
- 2.Sc3#
- 2.Sxf6#
- 2.Sxc7#
- 1...Sc3
- 2.Sxc3#
- 2.Sf6#
- 1...Sb5
- 2.Sc3#
- 2.Sxb4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Sxe7#
- 1...Se6
- 2.Sc3#
- 2.Sxb4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Sxe7#
- 2.Re5#
- 2.Qe5#
- 1...Sa8
- 2.Sc3#
- 2.Sxb4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Sxe7#
- 1...Se8
- 2.Sc3#
- 2.Sxb4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Sxe7#
- 1...Rg5!
- threat
- 1.Qa7?
- threat
- 2.Qd4#
- 1...Rd1
- 2.Bg6#
- 1...Bf6
- 2.Sxf6#
- 1...Se6
- 2.Re5#
- 1...Sb5!
- threat
- 1.Qb6?
- threat
- 2.Qd4#
- 1...Rd1
- 2.Bg6#
- 2.Qg6#
- 1...Bf6
- 2.Sxf6#
- 1...Se6
- 2.Re5#
- 1...Sb5!
- threat
- 1.Qb7?
- threat
- 2.Sc3#
- 2.Sf6#
- 2.Sxc7#
- 1...Sxd5
- 2.Qxd5#
- 1...Sxe8
- 2.Sc3#
- 2.Sf6#
- 2.Sc7#
- 2.Sxe7#
- 1...Re6
- 2.Sc3#
- 2.Sf6#
- 1...Rd1
- 2.Sc3#
- 2.Sf6#
- 2.Bg6#
- 1...Rg6
- 2.Sc3#
- 2.Sf6#
- 2.Bxg6#
- 1...Re5
- 2.Rxe5#
- 1...Rd7
- 2.Sc3#
- 2.Sf6#
- 2.Re5#
- 1...Bf6
- 2.Sc3#
- 2.Sxf6#
- 2.Sxc7#
- 1...Sc3
- 2.Sxc3#
- 2.Sf6#
- 1...Sb5
- 2.Sc3#
- 2.Sf6#
- 2.Sc7#
- 2.Sxe7#
- 1...Se6
- 2.Sc3#
- 2.Sf6#
- 2.Sc7#
- 2.Sxe7#
- 2.Re5#
- 1...Sa8
- 2.Sc3#
- 2.Sf6#
- 2.Sc7#
- 2.Sxe7#
- 1...Rg5!
- threat
- 1.Bc6?
- Keys
- 1.Qxb4!
- threat
- 2.c5#
- 1...Sxd5
- 2.cxd5#
- 1...Rc1
- 2.Bg6#
- 1...Rd1
- 2.Bg6#
- 1...Rg5
- 2.Qxb1#
- 1...Re5
- 2.Rxe5#
- 1...Be1
- 2.Sf6#
- 1...Bg5
- 2.Bg6#
- 1...Bf6
- 2.Sxf6#
- 1...Sd2
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sb5
- 2.cxb5#
- 1...Se6
- 2.Re5#
- threat
- 1.Qxb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 8
- Sets
- R(b);N_GUARD::B(J)
- R(b);N_GUARD::B(J),XR(b)
- R(h);N_GUARD,P_PINS(F)::R1(G),XR(h)
- R(h);N_GUARD::R1(G)
- R(h);N_GUARD,XS(H)::R1(G)
- B(e);N_GUARD::S(F)
- B(e);S_CUTR(b)::B(J)
- B(e);N_GUARD::S(F),XB(e)
- Tries
- Try
- B(J);
- Threat
- DUALS(3)
- Vars
- S(g);OGATE,P_SPINS(g),XS(F)::B(J),XS(g)
- R(h);N_GUARD,P_PINS(F)::R1(G),XR(h)
- Refutation
- R(b);P_PINS(F)
- Try
- Q(I);
- Threat
- QAR1(I)
- Vars
- R(b);N_GUARD::B(J)
- B(e);N_GUARD::S(F),XB(e)
- S(g);S_CUTR(h)::R1(G)
- Refutation
- S(g);
- Try
- Q(I);
- Threat
- QAR1(I)
- Vars
- B(e);N_GUARD::S(F),XB(e)
- S(g);S_CUTR(h)::R1(G)
- Refutation
- S(g);
- Try
- Q(I);
- Threat
- DUALS(3)
- Vars
- S(g);OGATE,P_SPINS(g),XS(F)::QAB1(I),XS(g)
- R(h);N_GUARD,P_PINS(F)::R1(G),XR(h)
- Refutation
- R(b);P_PINS(F)
- Try
- Actual
- Q(I);XP(c)
- Threat
- QAR(I)+P(C)
- Vars
- S(g);OGATE,XS(F)::QAR(I)+P(C),XS(g)
- R(b);N_GUARD::B(J)
- R(b);N_GUARD,P_PINS(F)::QAB(I),XS(a)
- R(h);N_GUARD,P_PINS(F)::R1(G),XR(h)
- B(e);N_GUARD,P_PINQ(I)::S(F)
- B(e);S_CUTR(b)::B(J)
- B(e);N_GUARD::S(F),XB(e)
- S(a);N_GUARD::S(F)
- S(g);OGATE::QAR(I)+P(C),XS(g)
- S(g);S_CUTR(h)::R1(G)
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).