MESON Chess Problem Database
Problem Display
PID: 10304 (8/3B4/8/1Kpp4/2P1kPN1/3nPp2/4P3/Q7 w - - 0 1)
Ling, John Francis
Problem (Zagreb), 1963
#2
8 + 5
SOLUTION
- SOUND
- Sets
- 1...Sc1
- 2.Qe5#
- 1...Se1
- 2.Qe5#
- 1...Sf2
- 2.Qe5#
- 1...Sb4
- 2.Qe5#
- 1...Sxf4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...fxe2
- 2.Qh1#
- 1...f2
- 2.Qh1#
- 1...dxc4
- 2.Qa8#
- 1...d4
- 2.Qa8#
- 1...Sc1
- Tries
- 1.Kb6?
- 1...Sxf4
- 2.Qe5#
- 1...fxe2
- 2.Qh1#
- 1...dxc4
- 2.Qa8#
- 1...Sc1
- 2.Qe5#
- 1...Se1
- 2.Qe5#
- 1...Sf2
- 2.Qe5#
- 1...Sb4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...f2
- 2.Qh1#
- 1...d4
- 2.Qa8#
- 1...Sb2!
- 1...Sxf4
- 1.Sf2+?
- 1...Sxf2
- 2.Qe5#
- 1...Kxe3!
- 1...Sxf2
- 1.Be6?
- 1...Sxf4
- 2.Qe5#
- 1...fxe2
- 2.Qh1#
- 1...dxc4
- 2.Qa8#
- 1...Sc1
- 2.Qe5#
- 1...Se1
- 2.Qe5#
- 1...Sf2
- 2.Qe5#
- 1...Sb4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...f2
- 2.Qh1#
- 1...d4
- 2.Qa8#
- 1...Sb2!
- 1...Sxf4
- 1.Bc8?
- 1...Sxf4
- 2.Qe5#
- 1...fxe2
- 2.Qh1#
- 1...dxc4
- 2.Qa8#
- 1...Sc1
- 2.Qe5#
- 1...Se1
- 2.Qe5#
- 1...Sf2
- 2.Qe5#
- 1...Sb4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...f2
- 2.Qh1#
- 1...d4
- 2.Qa8#
- 1...Sb2!
- 1...Sxf4
- 1.Qc3?
- threat
- 2.Qxd3#
- 2.exd3#
- 1...Sxf4
- 2.Sf2#
- 2.Sf6#
- 2.Qe5#
- 1...dxc4
- 2.Qxc4#
- 1...Sb2
- 2.Sf2#
- 2.Sf6#
- 2.Qe5#
- 1...Sc1
- 2.Sf2#
- 2.Sf6#
- 2.Qe5#
- 1...Se1
- 2.Sf2#
- 2.Sf6#
- 2.Qe5#
- 1...Sf2
- 2.Sxf2#
- 2.Sf6#
- 2.Qe5#
- 1...Sb4
- 2.Sf2#
- 2.Sf6#
- 2.Qe5#
- 1...Se5
- 2.Sf2#
- 2.Sf6#
- 2.Qxe5#
- 1...f2
- 2.Qxd3#
- 1...fxe2!
- threat
- 1.Qf6?
- threat
- 2.Bf5#
- 2.Qf5#
- 2.Qg6#
- 1...Sxf4
- 2.Bf5#
- 2.Qe5#
- 2.Qxf4#
- 2.Qf5#
- 1...dxc4
- 2.Bc6#
- 2.Qf5#
- 2.Qc6#
- 1...Se5
- 2.Bf5#
- 2.Qxe5#
- 2.Qf5#
- 1...fxe2!
- threat
- 1.Qb1?
- threat
- 2.Qxd3#
- 2.exd3#
- 1...fxe2
- 2.Qh1#
- 1...f2
- 2.Qxd3#
- 2.Qh1#
- 1...dxc4!
- threat
- 1.Qd1?
- threat
- 2.Qxd3#
- 2.exd3#
- 2.exf3#
- 1...Sxf4
- 2.exf3#
- 1...fxe2
- 2.Qh1#
- 1...Sb2
- 2.Qxd5#
- 2.exf3#
- 1...Sc1
- 2.Qxd5#
- 2.exf3#
- 1...Se1
- 2.Qxd5#
- 1...Sf2
- 2.Qxd5#
- 2.exf3#
- 1...Sb4
- 2.exf3#
- 1...Se5
- 2.Qxd5#
- 1...f2
- 2.Qh1#
- 2.Qxd3#
- 2.exd3#
- 1...dxc4!
- threat
- 1.Qh1?
- threat
- 2.Qxf3#
- 2.Qh7#
- 2.exf3#
- 1...Sxf4
- 2.Qxf3#
- 1...dxc4
- 2.Qxf3#
- 1...Sb2
- 2.Qxf3#
- 2.Qh7#
- 1...Sc1
- 2.Qxf3#
- 2.Qh7#
- 1...Se1
- 2.Qh7#
- 1...Sf2
- 2.Qxf3#
- 2.Qh7#
- 1...Sb4
- 2.Qxf3#
- 2.Qh7#
- 1...Se5!
- threat
- 1.Qa8?
- threat
- 2.Qxd5#
- 1...Sb4
- 2.Qe8#
- 1...Sxf4!
- threat
- 1.f5?
- 1...fxe2
- 2.Qh1#
- 1...dxc4
- 2.Qa8#
- 1...Sc1
- 2.Qe5#
- 1...Se1
- 2.Qe5#
- 1...Sf2
- 2.Qe5#
- 1...Sb4
- 2.Qe5#
- 1...Sf4
- 2.Qe5#
- 1...Se5
- 2.Qxe5#
- 1...f2
- 2.Qh1#
- 1...d4
- 2.Qa8#
- 1...Sb2!
- 1...fxe2
- 1.Kb6?
- Keys
- 1.Qh8!
- threat
- 2.Qh7#
- 1...Sxf4
- 2.Qe5#
- 1...fxe2
- 2.Qh1#
- 1...dxc4
- 2.Qa8#
- 1...Se5
- 2.Qxe5#
- threat
- 1.Qh8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 6
- Sets
- S(a);N_GUARD::QAR1(A)
- S(a);N_GUARD,XP(E)::QAR1(A)
- S(a);N_GUARD::QAR1(A),XS(a)
- P(b);OGATEB,XP(B)::QAB(A)
- P(b);OGATEB::QAB(A)
- P(e);OGATEB,XP(D)::QAB(A)
- P(e);OGATEB::QAB(A)
- Tries
- Try
- K(G);P-FLIGHT
- Vars
- S(a);N_GUARD,XP(E)::QAR1(A)
- P(b);OGATEB,XP(B)::QAB(A)
- P(e);OGATEB,XP(D)::QAB(A)
- S(a);N_GUARD::QAR1(A)
- S(a);N_GUARD::QAR1(A),XS(a)
- P(b);OGATEB::QAB(A)
- P(e);OGATEB::QAB(A)
- Refutation
- S(a);
- Try
- S(F);CHECK
- Vars
- S(a);XS(F)::QAR1(A)
- Refutation
- K(c);P-FLIGHT,XP(C)
- Try
- B(H);
- Vars
- S(a);N_GUARD,XP(E)::QAR1(A)
- P(b);OGATEB,XP(B)::QAB(A)
- P(e);OGATEB,XP(D)::QAB(A)
- S(a);N_GUARD::QAR1(A)
- S(a);N_GUARD::QAR1(A),XS(a)
- P(b);OGATEB::QAB(A)
- P(e);OGATEB::QAB(A)
- Refutation
- S(a);
- Try
- B(H);
- Vars
- S(a);N_GUARD,XP(E)::QAR1(A)
- P(b);OGATEB,XP(B)::QAB(A)
- P(e);OGATEB,XP(D)::QAB(A)
- S(a);N_GUARD::QAR1(A)
- S(a);N_GUARD::QAR1(A),XS(a)
- P(b);OGATEB::QAB(A)
- P(e);OGATEB::QAB(A)
- Refutation
- S(a);
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- P(e);OGATE,XP(D)::QAR2(A),XP(e)
- P(b);::QAB1(A),XS(a)
- Refutation
- P(b);XP(B)
- Try
- Q(A);
- Threat
- DUALS(3)
- Refutation
- P(b);XP(B)
- Try
- Q(A);P_PINS(a)
- Threat
- DUALS(2)
- Vars
- P(b);OGATEB,XP(B)::QAB(A)
- Refutation
- P(e);XP(D)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- S(a);XP(E)::P(B),XP(b)
- P(b);OGATEB,XP(B)::QAB(A)
- S(a);OGATE::QAB1(A),XP(e)
- S(a);::P(B),XP(b)
- Refutation
- P(e);XP(D)
- Try
- Q(A);P_PINP(b)
- Threat
- DUALS(3)
- Vars
- S(a);XP(E)::QAB1(A),XP(b)
- P(e);XP(D)::QAB1(A),XP(b)
- S(a);::QAB(A)
- Refutation
- S(a);
- Try
- Q(A);P_PINP(e)
- Threat
- QAB1(A),XP(e)
- Vars
- S(a);N_GUARD::QAR(A)
- Refutation
- S(a);XP(E)
- Try
- P(E);
- Vars
- P(b);OGATEB,XP(B)::QAB(A)
- P(e);OGATEB,XP(D)::QAB(A)
- S(a);N_GUARD::QAR1(A)
- S(a);N_GUARD::QAR1(A),XS(a)
- P(b);OGATEB::QAB(A)
- P(e);OGATEB::QAB(A)
- Refutation
- S(a);
- Try
- Actual
- Q(A);
- Threat
- QAB(A)
- Vars
- S(a);N_GUARD,XP(E)::QAR1(A)
- P(b);OGATEB,XP(B)::QAB(A)
- P(e);OGATEB,XP(D)::QAB(A)
- S(a);N_GUARD::QAR1(A),XS(a)
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).