MESON Chess Problem Database
Problem Display
PID: 10735 (1Q1RNR2/1p2b1B1/4B2K/2P1N1pp/4k1br/3ppn2/prpP1PP1/q7 w - - 0 1)
Froberg, Johan Hilding Laurentius
Stella Polaris, 1967
#2
12 + 14
SOLUTION
- SOUND
- Sets
- 1...Bh3
- 2.gxf3#
- 1...Bxe6
- 2.gxf3#
- 1...Sd4
- 2.Bd5#
- 1...Sxe5
- 2.Qxe5#
- 1...b5
- 2.Qb7#
- 2.Qa8#
- 1...b6
- 2.Qb7#
- 2.Qa8#
- 1...Bh3
- Tries
- 1.Sxf3?
- threat
- 2.Bd5#
- 2.Rd4#
- 2.Qe5#
- 1...Bxe6
- 2.Rd4#
- 2.Qe5#
- 1...Bxc5
- 2.Sxg5#
- 2.Sf6#
- 2.Bd5#
- 2.Qe5#
- 1...Bxd8
- 2.Sd6#
- 2.Qe5#
- 1...Bxf8
- 2.Sxg5#
- 2.Sf6#
- 2.Rd4#
- 2.Qe5#
- 1...Rb1
- 2.Bd5#
- 1...Rb3
- 2.Bd5#
- 1...Rb4
- 2.Bd5#
- 1...Rb5
- 2.Bd5#
- 1...Bd6
- 2.Sxg5#
- 2.Sxd6#
- 1...Bf6
- 2.Sxf6#
- 1...Rb6!
- threat
- 1.Sc4?
- threat
- 2.Bd5#
- 1...Bxe6
- 2.gxf3#
- 1...Bxd8
- 2.Scd6#
- 2.Sed6#
- 1...Bxf8
- 2.Sf6#
- 1...Bd6
- 2.Scxd6#
- 2.Sexd6#
- 1...Bf6
- 2.Sxf6#
- 1...Se5
- 2.Qxe5#
- 1...Rb6!
- threat
- 1.Sxg4?
- threat
- 2.Bd5#
- 2.Bf5#
- 2.gxf3#
- 1...Bxd8
- 2.Sd6#
- 2.gxf3#
- 1...Bxf8
- 2.Sgf6#
- 2.Sef6#
- 1...Sxd2
- 2.Bd5#
- 2.Bf5#
- 2.Rd4#
- 2.Qe5#
- 1...Rb6
- 2.gxf3#
- 1...Qd1
- 2.Bd5#
- 2.Bf5#
- 1...Qh1
- 2.Bd5#
- 2.Bf5#
- 1...Rh3
- 2.Bd5#
- 2.Bf5#
- 1...Bd6
- 2.Sxd6#
- 2.gxf3#
- 1...Bf6
- 2.Sgxf6#
- 2.Sexf6#
- 1...Se1
- 2.Bd5#
- 2.Bf5#
- 2.Rd4#
- 2.Qe5#
- 1...Sg1
- 2.Bd5#
- 2.Bf5#
- 2.Rd4#
- 2.Qe5#
- 1...Sh2
- 2.Bd5#
- 2.Bf5#
- 2.Rd4#
- 2.Qe5#
- 1...Sd4
- 2.Bd5#
- 2.Rxd4#
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...hxg4+!
- threat
- 1.Sc6?
- threat
- 2.Bd5#
- 1...Bxe6
- 2.gxf3#
- 1...Bxd8
- 2.Sd6#
- 1...Bxf8
- 2.Sf6#
- 1...Bd6
- 2.Sxd6#
- 1...Bf6
- 2.Sxf6#
- 1...bxc6!
- threat
- 1.Sf6+?
- 1...Kf4
- 2.Sxd3#
- 2.Sg6#
- 2.dxe3#
- 2.g3#
- 1...Bxf6!
- 1...Kf4
- 1.Bf5+?
- 1...Kf4
- 2.Sxd3#
- 2.Sg6#
- 2.dxe3#
- 2.g3#
- 1...Bxf5!
- 1...Kf4
- 1.dxe3?
- threat
- 2.Bd5#
- 1...Bxe6
- 2.gxf3#
- 1...Bxd8
- 2.Sd6#
- 1...Bxf8
- 2.Sf6#
- 1...Bd6
- 2.Sxd6#
- 1...Bf6
- 2.Sxf6#
- 1...Rb6!
- threat
- 1.Sxf3?
- Keys
- 1.Sg6!
- threat
- 2.Bd5#
- 1...Bxe6
- 2.gxf3#
- 1...Bxd8
- 2.Sd6#
- 1...Bxf8
- 2.Sf6#
- 1...Bd6
- 2.Sxd6#
- 1...Bf6
- 2.Sxf6#
- 1...Se5
- 2.Qxe5#
- threat
- 1.Sg6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- B(i);N_GUARD::P(C),XS(g)
- B(i);N_GUARD,XB(F)::P(C),XS(g)
- S(g);SBLOCK::B(F)
- S(g);OGATE,XS(E)::QAR1(I),XS(g)
- Tries
- Try
- S(E);XS(g)
- Threat
- DUALS(3)
- Vars
- R(c);::B(F)
- B(n);N_GUARD::S(K),XB(n)
- Refutation
- R(c);P_PINB(F)
- Try
- S(E);
- Threat
- B(F)
- Vars
- B(i);N_GUARD,XB(F)::P(C),XS(g)
- B(n);N_GUARD,P_PINB(H),XR(L)::S(K)
- B(n);N_GUARD::S(K),XB(n)
- S(g);N_GUARD::QAR1(I),XS(g)
- Refutation
- R(c);P_PINB(F)
- Try
- S(E);XB(i)
- Threat
- DUALS(3)
- Vars
- R(c);P_PINB(F)::P(C),XS(g)
- S(g);N_GUARD::QAR1(I),XS(g)
- Refutation
- P(l);CHECK,XS(E)
- Try
- S(E);
- Threat
- B(F)
- Vars
- B(i);N_GUARD,XB(F)::P(C),XS(g)
- B(n);N_GUARD,XR(J)::S(K)
- B(n);N_GUARD,P_PINB(H),XR(L)::S(K)
- B(n);N_GUARD::S(K),XB(n)
- Refutation
- P(m);XS(E)
- Try
- S(K);CHECK
- Refutation
- B(n);XS(K)
- Try
- B(F);CHECK
- Refutation
- B(i);XB(F)
- Try
- P(A);XP(f)
- Threat
- B(F)
- Vars
- B(i);N_GUARD,XB(F)::P(C),XS(g)
- B(n);N_GUARD,XR(J)::S(K)
- B(n);N_GUARD,P_PINB(H),XR(L)::S(K)
- B(n);N_GUARD::S(K),XB(n)
- Refutation
- R(c);P_PINB(F)
- Try
- Actual
- S(E);
- Threat
- B(F)
- Vars
- B(i);N_GUARD,XB(F)::P(C),XS(g)
- B(n);N_GUARD,XR(J)::S(K)
- B(n);N_GUARD,P_PINB(H),XR(L)::S(K)
- B(n);N_GUARD::S(K),XB(n)
- S(g);N_GUARD::QAR1(I),XS(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).