MESON Chess Problem Database
Problem Display
PID: 85734 (5r2/2N4Q/2N2kP1/3n4/7K/2p5/2B5/8 w - - 0 1)
Speckmann, Werner
Schach-Echo, 1979
#2
6 + 4
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rf7
- 2.Qxf7#
- 1...Ra8
- 2.Qf7#
- 1...Rb8
- 2.Qf7#
- 1...Rc8
- 2.Qf7#
- 1...Rd8
- 2.Qf7#
- 1...Re8
- 2.Qf7#
- 1...Rg8
- 2.Qf7#
- 1...Rh8
- 2.Qxh8#
- 1...Se3
- 2.Qe7#
- 1...Sb4
- 2.Qe7#
- 1...Sf4
- 2.Qe7#
- 1...Sb6
- 2.Qe7#
- 1...Sxc7
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...Rf7
- Tries
- 1.Kg4?
- 1...Sxc7
- 2.Qe7#
- 1...Rf7
- 2.Qxf7#
- 1...Ra8
- 2.Qf7#
- 1...Rb8
- 2.Qf7#
- 1...Rc8
- 2.Qf7#
- 1...Rd8
- 2.Qf7#
- 1...Re8
- 2.Qf7#
- 1...Rg8
- 2.Qf7#
- 1...Rh8
- 2.Qf7#
- 2.Qxh8#
- 1...Sb4
- 2.Qe7#
- 1...Sf4
- 2.Qe7#
- 1...Sb6
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...Se3+!
- 1...Sxc7
- 1.Kh5?
- 1...Sxc7
- 2.Qe7#
- 1...Rf7
- 2.Qxf7#
- 1...Ra8
- 2.Qf7#
- 1...Rb8
- 2.Qf7#
- 1...Rc8
- 2.Qf7#
- 1...Rd8
- 2.Qf7#
- 1...Re8
- 2.Qf7#
- 1...Rg8
- 2.Qf7#
- 1...Rh8
- 2.Qxh8#
- 1...Se3
- 2.Qe7#
- 1...Sb4
- 2.Qe7#
- 1...Sb6
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...Sf4+!
- 1...Sxc7
- 1.Se8+?
- 1...Rxe8
- 2.Qf7#
- 1...Ke6!
- 1...Rxe8
- 1.Bb1?
- 1...Sxc7
- 2.Qe7#
- 1...Rh8
- 2.Qxh8#
- 1...Rf7
- 2.Qxf7#
- 1...Ra8
- 2.Qf7#
- 1...Rb8
- 2.Qf7#
- 1...Rc8
- 2.Qf7#
- 1...Rd8
- 2.Qf7#
- 1...Re8
- 2.Qf7#
- 1...Rg8
- 2.Qf7#
- 1...Se3
- 2.Qe7#
- 1...Sb4
- 2.Qe7#
- 1...Sf4
- 2.Qe7#
- 1...Sb6
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...c2!
- 1...Sxc7
- 1.Bd3?
- 1...Sxc7
- 2.Qe7#
- 1...Rh8
- 2.Qxh8#
- 1...Rf7
- 2.Qxf7#
- 1...Ra8
- 2.Qf7#
- 1...Rb8
- 2.Qf7#
- 1...Rc8
- 2.Qf7#
- 1...Rd8
- 2.Qf7#
- 1...Re8
- 2.Qf7#
- 1...Rg8
- 2.Qf7#
- 1...Se3
- 2.Qe7#
- 1...Sb4
- 2.Qe7#
- 1...Sf4
- 2.Qe7#
- 1...Sb6
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...c2!
- 1...Sxc7
- 1.Be4?
- 1...Sxc7
- 2.Qe7#
- 1...Rh8
- 2.Qxh8#
- 1...Rf7
- 2.Qxf7#
- 1...Ra8
- 2.Qf7#
- 1...Rb8
- 2.Qf7#
- 1...Rc8
- 2.Qf7#
- 1...Rd8
- 2.Qf7#
- 1...Re8
- 2.Qf7#
- 1...Rg8
- 2.Qf7#
- 1...Se3
- 2.Qe7#
- 1...Sb4
- 2.Qe7#
- 1...Sf4
- 2.Qe7#
- 1...Sb6
- 2.Qe7#
- 1...Se7
- 2.Qxe7#
- 1...c2!
- 1...Sxc7
- 1.Qd7?
- threat
- 2.Sxd5#
- 1...Sxc7
- 2.Qe7#
- 1...Rf7
- 2.Se8#
- 2.Qxf7#
- 1...Se7
- 2.Qd4#
- 2.Qxe7#
- 1...Se3
- 2.Qd4#
- 2.Qe7#
- 1...Sb4
- 2.Qd4#
- 2.Qe7#
- 1...Sf4
- 2.Qd4#
- 2.Qe7#
- 1...Sb6
- 2.Qd4#
- 2.Qe7#
- 1...Rh8+!
- threat
- 1.Kg4?
- Keys
- 1.g7!
- threat
- 2.Qg6#
- 2.gxf8Q#
- 2.gxf8R#
- 1...Kf7
- 2.g8S#
- 1...Sxc7
- 2.Qg6#
- 1...Rh8
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rf7
- 2.Qg6#
- 2.Qh6#
- 2.g8S#
- 1...Ra8
- 2.Qg6#
- 1...Rb8
- 2.Qg6#
- 1...Rc8
- 2.Qg6#
- 1...Rd8
- 2.Qg6#
- 1...Re8
- 2.Qg6#
- 1...Rg8
- 2.Qg6#
- 1...Se3
- 2.Qg6#
- 2.gxf8Q#
- 2.gxf8R#
- 1...Sb4
- 2.Qg6#
- 2.gxf8Q#
- 2.gxf8R#
- 1...Sf4
- 2.gxf8Q#
- 2.gxf8R#
- 1...Sb6
- 2.Qg6#
- 2.gxf8Q#
- 2.gxf8R#
- 1...Se7
- 2.gxf8Q#
- 2.gxf8R#
- threat
- 1.g7!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 7
- ADDED MATES = 1
- REMOVED MATES = 7
- Sets
- R(d);N_GUARD::QAR1(F),XR(d)
- R(d);N_GUARD::QAR1(F)
- R(d);N_GUARD,P_PINQ(F)::QAB(F),XR(d)
- S(b);N_GUARD::QAB1(F)
- S(b);N_GUARD,XS(E)::QAB1(F)
- S(b);N_GUARD::QAB1(F),XS(b)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- S(b);N_GUARD,XS(E)::QAB1(F)
- R(d);N_GUARD::QAR1(F),XR(d)
- R(d);N_GUARD::QAR1(F)
- R(d);N_GUARD,P_PINP(D)::QAR1(F)
- S(b);N_GUARD::QAB1(F)
- S(b);N_GUARD::QAB1(F),XS(b)
- Refutation
- S(b);CHECK
- Try
- K(B);P-FLIGHT
- Vars
- S(b);N_GUARD,XS(E)::QAB1(F)
- R(d);N_GUARD::QAR1(F),XR(d)
- R(d);N_GUARD::QAR1(F)
- R(d);N_GUARD,P_PINQ(F)::QAB(F),XR(d)
- S(b);N_GUARD::QAB1(F)
- S(b);N_GUARD::QAB1(F),XS(b)
- Refutation
- S(b);CHECK
- Try
- S(E);CHECK
- Vars
- R(d);XS(E)::QAR1(F)
- Refutation
- K(c);P-FLIGHT
- Try
- B(A);
- Vars
- S(b);N_GUARD,XS(E)::QAB1(F)
- R(d);N_GUARD,P_PINQ(F)::QAB(F),XR(d)
- R(d);N_GUARD::QAR1(F),XR(d)
- R(d);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAB1(F)
- S(b);N_GUARD::QAB1(F),XS(b)
- Refutation
- P(a);
- Try
- B(A);
- Vars
- S(b);N_GUARD,XS(E)::QAB1(F)
- R(d);N_GUARD,P_PINQ(F)::QAB(F),XR(d)
- R(d);N_GUARD::QAR1(F),XR(d)
- R(d);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAB1(F)
- S(b);N_GUARD::QAB1(F),XS(b)
- Refutation
- P(a);
- Try
- B(A);
- Vars
- S(b);N_GUARD,XS(E)::QAB1(F)
- R(d);N_GUARD,P_PINQ(F)::QAB(F),XR(d)
- R(d);N_GUARD::QAR1(F),XR(d)
- R(d);N_GUARD::QAR1(F)
- S(b);N_GUARD::QAB1(F)
- S(b);N_GUARD::QAB1(F),XS(b)
- Refutation
- P(a);
- Try
- Q(F);
- Threat
- S(E),XS(b)
- Vars
- S(b);N_GUARD,XS(E)::QAB1(F)
- Refutation
- R(d);CHECK
- Try
- Actual
- P(D);
- Threat
- DUALS(3)
- Vars
- K(c);P-FLIGHT::P=S
- S(b);XS(E)::QAR1(F)
- R(d);OGATE,P_PINQ(F)::PXR(d)=Q
- R(d);::QAR1(F)
- S(b);::PXR(d)=Q
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).