MESON Chess Problem Database
Problem Display
PID: 10305 (n1R3n1/3p4/2NpN3/1p1k2p1/rp6/1p6/1P1K4/2Q1R3 w - - 0 1)
Ling, John Francis
Problem (Zagreb), 1963
#2
7 + 10
| 136 | Problem Observer | 2002 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Sxb4#
- 1...Ra2
- 2.Sxb4#
- 1...Ra3
- 2.Sxb4#
- 1...Ra5
- 2.Sxb4#
- 1...Ra6
- 2.Sxb4#
- 1...Ra7
- 2.Sxb4#
- 1...Sb6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sf6
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...g4
- 2.Sf4#
- 1...dxc6
- 2.Qxc6#
- 1...Ra1
- Tries
- 1.Kd1?
- 1...dxc6
- 2.Qxc6#
- 1...Ra1
- 2.Sxb4#
- 1...Ra2
- 2.Sxb4#
- 1...Ra3
- 2.Sxb4#
- 1...Ra5
- 2.Sxb4#
- 1...Ra6
- 2.Sxb4#
- 1...Ra7
- 2.Sxb4#
- 1...Sb6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sf6
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...g4
- 2.Sf4#
- 1...dxe6!
- 1...dxc6
- 1.Kd3?
- threat
- 2.Qxg5#
- 1...Sc7
- 2.Sxc7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...g4
- 2.Sf4#
- 2.Qg5#
- 1...dxe6!
- threat
- 1.Re2?
- 1...dxc6
- 2.Qxc6#
- 1...Ra1
- 2.Sxb4#
- 1...Ra2
- 2.Sxb4#
- 1...Ra3
- 2.Sxb4#
- 1...Ra5
- 2.Sxb4#
- 1...Ra6
- 2.Sxb4#
- 1...Ra7
- 2.Sxb4#
- 1...Sb6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sf6
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...g4
- 2.Sf4#
- 1...dxe6!
- 1...dxc6
- 1.Re3?
- 1...dxc6
- 2.Qxc6#
- 1...Ra1
- 2.Sxb4#
- 1...Ra2
- 2.Sxb4#
- 1...Ra3
- 2.Sxb4#
- 1...Ra5
- 2.Sxb4#
- 1...Ra6
- 2.Sxb4#
- 1...Ra7
- 2.Sxb4#
- 1...Sb6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sf6
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...g4
- 2.Sf4#
- 1...dxe6!
- 1...dxc6
- 1.Rb8?
- threat
- 2.Rxb5#
- 1...Ra5
- 2.Sxb4#
- 1...Sb6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...dxc6!
- threat
- 1.Rf8?
- threat
- 2.Rf5#
- 1...Sf6
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...dxe6!
- threat
- 1.Rxg8?
- threat
- 2.Se7#
- 2.Rxg5#
- 1...dxc6
- 2.Rxg5#
- 1...g4
- 2.Se7#
- 2.Sf4#
- 2.Rg5#
- 1...dxe6!
- threat
- 1.Qb1?
- threat
- 2.Qd3#
- 2.Qe4#
- 1...Kc4
- 2.Qd3#
- 2.Qe4#
- 1...Sc7
- 2.Qe4#
- 1...Sf6
- 2.Se7#
- 2.Qd3#
- 1...dxe6!
- threat
- 1.Qc3?
- threat
- 2.Qd4#
- 2.Qxb3#
- 2.Qd3#
- 1...dxe6
- 2.Qd4#
- 1...Ra3
- 2.Sxb4#
- 2.Qd4#
- 2.Qd3#
- 1...Sb6
- 2.Sc7#
- 2.Qd4#
- 2.Qd3#
- 1...Sc7
- 2.Sxc7#
- 1...bxc3+!
- threat
- 1.Kd1?
- Keys
- 1.Rd8!
- 1...dxc6
- 2.Qc5#
- 1...dxe6
- 2.Re5#
- 1...Ra1
- 2.Sxb4#
- 1...Ra2
- 2.Sxb4#
- 1...Ra3
- 2.Sxb4#
- 1...Ra5
- 2.Sxb4#
- 1...Ra6
- 2.Sxb4#
- 1...Ra7
- 2.Sxb4#
- 1...Sb6
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sf6
- 2.Se7#
- 1...Sh6
- 2.Se7#
- 1...Se7
- 2.Sxe7#
- 1...g4
- 2.Sf4#
- 1...dxc6
- 1.Rd8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(b);N_GUARD::S(E),XP(c)
- R(b);N_GUARD,P_PINP(C)::S(E),XP(c)
- S(i);N_GUARD::S(F)
- S(i);N_GUARD::S(F),XS(i)
- S(j);N_GUARD::S(E)
- S(j);N_GUARD::S(E),XS(j)
- P(f);N_GUARD::S(F)
- P(h);OGATE,XS(E)::QAB1(A),XP(h)
- Tries
- Try
- K(D);P-FLIGHT
- Vars
- P(h);OGATE,XS(E)::QAB1(A),XP(h)
- R(b);N_GUARD,P_PINQ(A)::S(E),XP(c)
- R(b);N_GUARD::S(E),XP(c)
- S(i);N_GUARD::S(F)
- S(i);N_GUARD::S(F),XS(i)
- S(j);N_GUARD::S(E)
- S(j);N_GUARD::S(E),XS(j)
- P(f);N_GUARD::S(F)
- Refutation
- P(h);XS(F)
- Try
- K(D);P-FLIGHT
- Threat
- QAR(A),XP(f)
- Vars
- S(i);N_GUARD::S(F),XS(i)
- S(j);N_GUARD::S(E)
- S(j);N_GUARD::S(E),XS(j)
- Refutation
- P(h);XS(F)
- Try
- R(B);
- Vars
- P(h);OGATE,XS(E)::QAB1(A),XP(h)
- R(b);N_GUARD::S(E),XP(c)
- R(b);N_GUARD,P_PINP(C)::S(E),XP(c)
- S(i);N_GUARD::S(F)
- S(i);N_GUARD::S(F),XS(i)
- S(j);N_GUARD::S(E)
- S(j);N_GUARD::S(E),XS(j)
- P(f);N_GUARD::S(F)
- Refutation
- P(h);XS(F)
- Try
- R(B);
- Vars
- P(h);OGATE,XS(E)::QAB1(A),XP(h)
- R(b);N_GUARD::S(E),XP(c)
- R(b);N_GUARD,P_PINP(C)::S(E),XP(c)
- S(i);N_GUARD::S(F)
- S(i);N_GUARD::S(F),XS(i)
- S(j);N_GUARD::S(E)
- S(j);N_GUARD::S(E),XS(j)
- P(f);N_GUARD::S(F)
- Refutation
- P(h);XS(F)
- Try
- R(G);
- Threat
- R(G),XP(d)
- Vars
- R(b);N_GUARD::S(E),XP(c)
- S(i);N_GUARD::S(F)
- S(i);N_GUARD::S(F),XS(i)
- Refutation
- P(h);XS(E)
- Try
- R(G);
- Threat
- R(G)
- Vars
- S(j);N_GUARD::S(E)
- S(j);N_GUARD::S(E),XS(j)
- Refutation
- P(h);XS(F)
- Try
- R(G);XS(j)
- Threat
- DUALS(2)
- Vars
- P(h);XS(E)::R(G),XP(f)
- Refutation
- P(h);XS(F)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(i);::QAB1(A)
- Refutation
- P(h);XS(F)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- P(h);XS(F)::QAR1(A)
- S(i);N_GUARD::S(F),XS(i)
- Refutation
- P(c);CHECK,XQ(A)
- Try
- Actual
- R(G);
- Vars
- P(h);P_SPINP(g),XS(E)::QAR1(A)
- P(h);P_SPINP(g),XS(F)::R1(B)
- R(b);N_GUARD::S(E),XP(c)
- R(b);N_GUARD,P_PINP(C)::S(E),XP(c)
- S(i);N_GUARD::S(F)
- S(i);N_GUARD::S(F),XS(i)
- S(j);N_GUARD::S(E)
- S(j);N_GUARD::S(E),XS(j)
- P(f);N_GUARD::S(F)
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).