MESON Chess Problem Database
Problem Display
PID: 12323 (1n3NK1/4BQ2/q4pB1/1Rrrk3/7R/2P1Nb2/p2P4/b7 w - - 0 1)
Froberg, Johan Hilding Laurentius
Widlert, Kjell Einar
The Problemist, 1977
#2
10 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxb5
- 2.Qe6#
- 2.Qxf6#
- 1...Qb7
- 2.Qe6#
- 2.Qxf6#
- 1...Qc8
- 2.Qxf6#
- 1...Qa3
- 2.Qe6#
- 2.Qxf6#
- 1...Qa4
- 2.Qe6#
- 2.Qxf6#
- 1...Qa5
- 2.Qe6#
- 2.Qxf6#
- 1...Qe6
- 2.Qxe6#
- 1...Qa7
- 2.Qe6#
- 2.Qxf6#
- 1...Qa8
- 2.Qe6#
- 2.Qxf6#
- 1...Rxc3
- 2.d4#
- 1...Rc4
- 2.Sxc4#
- 1...Rxb5
- 2.Sc4#
- 1...Rc6
- 2.d4#
- 1...Rc7
- 2.d4#
- 1...Rc8
- 2.d4#
- 1...Rxd2
- 2.Sc4#
- 1...Rd3
- 2.Sc4#
- 1...Rd6
- 2.Sc4#
- 1...Rd7
- 2.Sc4#
- 1...Rd8
- 2.Sc4#
- 1...Bd1
- 2.Re4#
- 1...Be2
- 2.Re4#
- 1...Be4
- 2.Rxe4#
- 1...Bh5
- 2.Re4#
- 1...Sc6
- 2.Qe6#
- 2.Qxf6#
- 1...f5
- 2.Qxf5#
- 1...Qxb5
- Tries
- 1.Sd7+?
- 1...Rxd7
- 2.Sc4#
- 1...Sxd7!
- 1...Rxd7
- 1.Bd3?
- threat
- 2.Sg6#
- 1...Qc8
- 2.Qxf6#
- 1...Rd8
- 2.Sc4#
- 1...Be4
- 2.Rxe4#
- 1...Bh5
- 2.Re4#
- 1...f5
- 2.Qxf5#
- 1...Rc8!
- threat
- 1.Bf5?
- threat
- 2.Sg6#
- 1...Qc8
- 2.Qxf6#
- 1...Rc8
- 2.d4#
- 1...Bh5
- 2.Re4#
- 1...Rd8!
- threat
- 1.Bh7?
- threat
- 2.Sg6#
- 1...Qc8
- 2.Qxf6#
- 1...Rc8
- 2.d4#
- 1...Rd8
- 2.Sc4#
- 1...Be4
- 2.Rxe4#
- 1...Bh5
- 2.Re4#
- 1...f5
- 2.Qxf5#
- 1...Bg4!
- threat
- 1.Qxd5+?
- 1...Rxd5
- 2.Sc4#
- 2.d4#
- 1...Bxd5+!
- 1...Rxd5
- 1.Sd7+?
- Keys
- 1.Bc2!
- threat
- 2.Sg6#
- 1...Qc8
- 2.Qxf6#
- 1...Rc8
- 2.d4#
- 1...Rd8
- 2.Sc4#
- 1...Be4
- 2.Rxe4#
- 1...Bh5
- 2.Re4#
- 1...f5
- 2.Qxf5#
- threat
- 1.Bc2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 12
- Sets
- Q(g);N_GUARD,P_PINS(I)::QAB1(H),XP(h)
- Q(g);N_GUARD,P_PINQ(H)::QAR1(H),XQ(g)
- R(d);P_SPINR(e),XP(B)::P(A)
- R(d);N_GUARD,P_SPINR(e)::S(C),XR(d)
- R(d);N_GUARD,XR(E)::S(C)
- R(d);P_SPINR(e)::P(A)
- R(d);P_PINS(I),P_SPINR(e)::P(A)
- R(e);P_SPINR(d),XP(A)::S(C)
- R(e);P_SPINR(d)::S(C)
- R(e);P_PINS(I),P_SPINR(d)::S(C)
- B(c);N_GUARD::R1(D)
- B(c);N_GUARD::R1(D),XB(c)
- P(h);OGATE::QAR1(H),XP(h)
- Tries
- Try
- S(I);CHECK
- Vars
- R(e);P_SPINR(d),XS(I)::S(C)
- Refutation
- S(i);XS(I)
- Try
- B(F);
- Threat
- S(I)
- Vars
- Q(g);N_GUARD,P_PINS(I)::QAB1(H),XP(h)
- R(e);P_PINS(I),P_SPINR(d)::S(C)
- B(c);N_GUARD::R1(D),XB(c)
- B(c);N_GUARD::R1(D)
- P(h);OGATE::QAR1(H),XP(h)
- Refutation
- R(d);P_PINS(I),P_SPINR(e)
- Try
- B(F);
- Threat
- S(I)
- Vars
- Q(g);N_GUARD,P_PINS(I)::QAB1(H),XP(h)
- R(d);P_PINS(I),P_SPINR(e)::P(A)
- B(c);N_GUARD::R1(D)
- Refutation
- R(e);P_PINS(I),P_SPINR(d)
- Try
- B(F);
- Threat
- S(I)
- Vars
- Q(g);N_GUARD,P_PINS(I)::QAB1(H),XP(h)
- R(d);P_PINS(I),P_SPINR(e)::P(A)
- R(e);P_PINS(I),P_SPINR(d)::S(C)
- B(c);N_GUARD::R1(D),XB(c)
- B(c);N_GUARD::R1(D)
- P(h);OGATE::QAR1(H),XP(h)
- Refutation
- B(c);
- Try
- Q(H);CHECK,XR(e)
- Refutation
- B(c);CHECK,XQ(H)
- Try
- Actual
- B(F);
- Threat
- S(I)
- Vars
- Q(g);N_GUARD,P_PINS(I)::QAB1(H),XP(h)
- R(d);P_PINS(I),P_SPINR(e)::P(A)
- R(e);P_PINS(I),P_SPINR(d)::S(C)
- B(c);N_GUARD::R1(D),XB(c)
- B(c);N_GUARD::R1(D)
- P(h);OGATE::QAR1(H),XP(h)
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).