MESON Chess Problem Database
Problem Display
PID: 36168 (1rB5/1Pk5/Q1N5/3p1N2/2nK4/8/8/2R5 w - - 0 1)
Lider, Valentin Viktorovich
Sp. Prize, Shakhmaty v SSSR, 1975
#2
7 + 4
| 3771 | FIDE Album (1974-1976) | 1980 |
SOLUTION
- SOUND
- Sets
- 1...Rxb7
- 2.Qxb7#
- 1...Ra8
- 2.bxa8S#
- 1...Rxc8
- 2.bxc8Q#
- 1...Sb2
- 2.Qa5#
- 1...Sd2
- 2.Qa5#
- 1...Sa3
- 2.Qa5#
- 1...Se3
- 2.Qa5#
- 1...Sa5
- 2.Qxa5#
- 1...Se5
- 2.Qa5#
- 1...Sd6
- 2.Qa5#
- 1...Rxb7
- Tries
- 1.Kc5?
- 1...Rxb7
- 2.Qxb7#
- 1...Rxc8
- 2.bxc8Q#
- 1...Ra8
- 2.bxa8S#
- 1...Sb2
- 2.Qa5#
- 2.Qb6#
- 1...Sd2
- 2.Qa5#
- 2.Qb6#
- 1...Sa3
- 2.Qa5#
- 2.Qb6#
- 1...Se3
- 2.Qa5#
- 2.Qb6#
- 1...Sa5
- 2.Qxa5#
- 2.Qb6#
- 1...Se5
- 2.Qa5#
- 2.Qb6#
- 1...Sb6
- 2.Qxb6#
- 1...Sd6
- 2.Qa5#
- 2.Qb6#
- 1...d4!
- 1...Rxb7
- 1.Sa7?
- threat
- 2.Qa5#
- 2.Qd6#
- 1...Rxb7
- 2.Qd6#
- 1...Rxc8
- 2.bxc8Q#
- 1...Ra8
- 2.Qd6#
- 1...Kd8!
- threat
- 1.Sce7?
- threat
- 2.Qa5#
- 2.Qd6#
- 1...Rxb7
- 2.Qd6#
- 1...Rxc8
- 2.bxc8Q#
- 1...Ra8
- 2.Qd6#
- 1...Kd8!
- threat
- 1.Rb1?
- 1...Rxb7
- 2.Qxb7#
- 1...Rxc8
- 2.bxc8Q#
- 1...Sb6
- 2.Qxb6#
- 1...Ra8
- 2.bxa8S#
- 1...Sd2
- 2.Qb6#
- 1...Sa3
- 2.Qb6#
- 1...Se3
- 2.Qb6#
- 1...Sa5
- 2.Qb6#
- 1...Se5
- 2.Qb6#
- 1...Sd6
- 2.Qb6#
- 1...Sb2!
- 1...Rxb7
- 1.Rc2?
- 1...Rxb7
- 2.Qxb7#
- 1...Rxc8
- 2.bxc8Q#
- 1...Sb2
- 2.Qa5#
- 1...Ra8
- 2.bxa8S#
- 1...Sd2
- 2.Qa5#
- 1...Sa3
- 2.Qa5#
- 1...Se3
- 2.Qa5#
- 1...Sa5
- 2.Qxa5#
- 1...Se5
- 2.Qa5#
- 1...Sd6
- 2.Qa5#
- 1...Sb6!
- 1...Rxb7
- 1.Rc3?
- 1...Rxb7
- 2.Qxb7#
- 1...Rxc8
- 2.bxc8Q#
- 1...Sb2
- 2.Qa5#
- 1...Ra8
- 2.bxa8S#
- 1...Sd2
- 2.Qa5#
- 1...Sa3
- 2.Qa5#
- 1...Se3
- 2.Qa5#
- 1...Sa5
- 2.Qxa5#
- 1...Se5
- 2.Qa5#
- 1...Sd6
- 2.Qa5#
- 1...Sb6!
- 1...Rxb7
- 1.Rxc4?
- threat
- 2.Qa5#
- 1...Rxb7
- 2.Qxb7#
- 1...Rxc8
- 2.bxc8Q#
- 1...Ra8
- 2.bxa8S#
- 1...dxc4!
- threat
- 1.Kc5?
- Keys
- 1.Qa7!
- 1...Kxc6
- 2.Qc5#
- 1...Rxb7
- 2.Qxb7#
- 1...Rxc8
- 2.b8S#
- 1...Sb2
- 2.Qa5#
- 1...Ra8
- 2.bxa8Q#
- 1...Sd2
- 2.Qa5#
- 1...Sa3
- 2.Qa5#
- 1...Se3
- 2.Qa5#
- 1...Sa5
- 2.Qxa5#
- 1...Se5
- 2.Qa5#
- 1...Sb6
- 2.Qxb8#
- 1...Sd6
- 2.Qa5#
- 1...Kxc6
- 1.Qa7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(d);OGATE,XP(F)::QAR1(D),XR(d)
- R(d);OGATE::PXR(d)=S
- R(d);OGATE,XB(G)::PXR(d)=Q
- S(a);N_GUARD::QAB(D)
- S(a);N_GUARD::QAB(D),XS(a)
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- R(d);OGATE,XP(F)::QAR1(D),XR(d)
- R(d);OGATE,XB(G)::PXR(d)=Q
- R(d);OGATE::PXR(d)=S
- S(a);N_GUARD::QAB1(D),XS(a)
- Refutation
- P(b);
- Try
- S(E);P_PINS(a)
- Threat
- DUALS(2)
- Vars
- R(d);XP(F)::QAB1(D)
- R(d);OGATE,XB(G)::PXR(d)=Q
- R(d);::QAB1(D)
- Refutation
- K(c);N_SPINS(a),S_FLIGHT
- Try
- S(E);P_PINS(a)
- Threat
- DUALS(2)
- Vars
- R(d);XP(F)::QAB1(D)
- R(d);OGATE,XB(G)::PXR(d)=Q
- R(d);::QAB1(D)
- Refutation
- K(c);N_SPINS(a),S_FLIGHT
- Try
- R(A);
- Vars
- R(d);OGATE,XP(F)::QAR1(D),XR(d)
- R(d);OGATE,XB(G)::PXR(d)=Q
- S(a);N_GUARD::QAB1(D),XS(a)
- R(d);OGATE::PXR(d)=S
- S(a);N_GUARD::QAB1(D)
- Refutation
- S(a);
- Try
- R(A);
- Vars
- R(d);OGATE,XP(F)::QAR1(D),XR(d)
- R(d);OGATE,XB(G)::PXR(d)=Q
- S(a);N_GUARD::QAB(D)
- R(d);OGATE::PXR(d)=S
- S(a);N_GUARD::QAB(D),XS(a)
- Refutation
- S(a);
- Try
- R(A);
- Vars
- R(d);OGATE,XP(F)::QAR1(D),XR(d)
- R(d);OGATE,XB(G)::PXR(d)=Q
- S(a);N_GUARD::QAB(D)
- R(d);OGATE::PXR(d)=S
- S(a);N_GUARD::QAB(D),XS(a)
- Refutation
- S(a);
- Try
- R(A);XS(a)
- Threat
- QAB(D)
- Vars
- R(d);OGATE,XP(F)::QAR1(D),XR(d)
- R(d);OGATE,XB(G)::PXR(d)=Q
- R(d);OGATE::PXR(d)=S
- Refutation
- P(b);XR(A)
- Try
- Actual
- Q(D);
- Vars
- K(c);OGATEB,P-FLIGHT,P_SPINS(a),XS(E)::QAR1(D)
- R(d);OGATE,P_SPINR(d),XP(F)::QAR1(D),XR(d)
- R(d);OGATE,SBLOCK,XB(G)::P=S
- S(a);N_GUARD::QAB(D)
- R(d);OGATE::PXR(d)=Q
- S(a);N_GUARD::QAB(D),XS(a)
- S(a);SBLOCK::QAB1(D),XR(d)
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).