MESON Chess Problem Database
Problem Display
PID: 166943 (8/2Kp1pr1/2p1r3/2p1N1n1/2P2k1p/4R2P/1B5P/nB4Q1 w - - 0 1)
Lukyanov, V?
4/5 Prize, Shakhmaty v SSSR, 1977
#2
9 + 10
| 702 | Phenix | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Rxe5
- 2.Bxe5#
- 1...Sf3
- 2.Rxf3#
- 1...Sxh3
- 2.Rf3#
- 1...Se4
- 2.Rf3#
- 1...Sh7
- 2.Rf3#
- 1...f5
- 2.Sd3#
- 1...Rxe5
- Tries
- 1.Bd4?
- threat
- 2.Qg4#
- 1...Sxh3
- 2.Rf3#
- 1...Se4
- 2.Rf3#
- 1...Sf3
- 2.Rxf3#
- 1...Sh7
- 2.Rf3#
- 1...f5
- 2.Sd3#
- 1...cxd4!
- threat
- 1.Re1?
- threat
- 2.Bc1#
- 2.Qe3#
- 2.Qg4#
- 1...Rxe5
- 2.Qg4#
- 1...Sxh3
- 2.Bc1#
- 2.Qe3#
- 1...Sc2
- 2.Qg4#
- 1...Rd6
- 2.Qe3#
- 2.Qg4#
- 1...Sb3
- 2.Qe3#
- 2.Qg4#
- 1...Sf3
- 2.Qe3#
- 1...Sh7
- 2.Bc1#
- 2.Rf1#
- 2.Qe3#
- 1...f5
- 2.Bc1#
- 2.Qe3#
- 1...Se4!
- threat
- 1.Re2?
- threat
- 2.Bc1#
- 2.Qe3#
- 2.Qc1#
- 2.Qg4#
- 1...Rxe5
- 2.Qg4#
- 1...Sxh3
- 2.Bc1#
- 2.Qe3#
- 2.Qc1#
- 1...Sc2
- 2.Qg4#
- 1...Rd6
- 2.Qe3#
- 2.Qg4#
- 1...Sb3
- 2.Qe3#
- 2.Qg4#
- 1...Sf3
- 2.Qe3#
- 1...Sh7
- 2.Bc1#
- 2.Qe3#
- 2.Qc1#
- 1...f5
- 2.Bc1#
- 2.Qe3#
- 2.Qc1#
- 1...Se4!
- threat
- 1.Ra3?
- threat
- 2.Qe3#
- 2.Qc1#
- 2.Qg4#
- 1...Rxe5
- 2.Qg4#
- 1...Sxh3
- 2.Rf3#
- 2.Qe3#
- 2.Qc1#
- 1...Sc2
- 2.Qg4#
- 1...Se4
- 2.Rf3#
- 1...Rd6
- 2.Qe3#
- 2.Qg4#
- 1...Sf3
- 2.Rxf3#
- 2.Qe3#
- 1...Sh7
- 2.Rf3#
- 2.Qe3#
- 2.Qc1#
- 1...f5
- 2.Qe3#
- 2.Qc1#
- 1...Sb3!
- threat
- 1.Rb3?
- threat
- 2.Qe3#
- 2.Qc1#
- 2.Qg4#
- 1...Rxe5
- 2.Qg4#
- 1...Sxh3
- 2.Rf3#
- 2.Qe3#
- 2.Qc1#
- 1...Sc2
- 2.Qg4#
- 1...Se4
- 2.Rf3#
- 1...Rd6
- 2.Qe3#
- 2.Qg4#
- 1...Sf3
- 2.Rxf3#
- 2.Qe3#
- 1...Sh7
- 2.Rf3#
- 2.Qe3#
- 2.Qc1#
- 1...f5
- 2.Qe3#
- 2.Qc1#
- 1...Sxb3!
- threat
- 1.Rc3?
- threat
- 2.Qe3#
- 1...Kxe5
- 2.Rf3#
- 1...Rxe5
- 2.Qg4#
- 1...Se4
- 2.Rf3#
- 1...Sc2!
- threat
- 1.Qc1?
- threat
- 2.Re1#
- 2.Re2#
- 2.Ra3#
- 2.Rb3#
- 2.Rf3#
- 2.Rg3#
- 1...Rxe5
- 2.Bxe5#
- 1...Sf3
- 2.Rxf3#
- 1...Se4
- 2.Rf3#
- 1...Rd6
- 2.Rf3#
- 1...Sb3
- 2.Rxb3#
- 2.Rf3#
- 1...Sc2!
- threat
- 1.Qxg5+?
- 1...Rxg5
- 2.Rf3#
- 1...Kxg5!
- 1...Rxg5
- 1.Bd4?
- Keys
- 1.Rd3!
- threat
- 2.Qg4#
- 1...Ke4
- 2.Qg4#
- 1...Kf5
- 2.Rf3#
- 1...Sxh3
- 2.Rf3#
- 1...Sf3
- 2.Rxf3#
- 1...Se4
- 2.Rf3#
- 1...Sh7
- 2.Rf3#
- 1...f5
- 2.Qe3#
- threat
- 1.Rd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- R(g);OGATE,XS(H)::B(C),XR(g)
- S(e);N_GUARD::R1(E),XS(e)
- S(e);N_GUARD,XP(F)::R1(E)
- S(e);N_GUARD::R1(E)
- P(i);SBLOCK::S(H)
- Tries
- Try
- B(C);
- Threat
- QAR1(B)
- Vars
- S(e);N_GUARD,XP(F)::R1(E)
- S(e);N_GUARD::R1(E)
- S(e);N_GUARD::R1(E),XS(e)
- P(i);SBLOCK::S(H)
- Refutation
- P(d);XB(C)
- Try
- R(E);
- Threat
- DUALS(3)
- Vars
- R(g);XS(H)::QAR1(B)
- S(a);::QAR1(B)
- S(e);::QAB1(B)
- Refutation
- S(e);
- Try
- R(E);
- Threat
- DUALS(4)
- Vars
- R(g);XS(H)::QAR1(B)
- S(a);::QAR1(B)
- S(e);::QAB1(B)
- Refutation
- S(e);
- Try
- R(E);
- Threat
- DUALS(3)
- Vars
- R(g);XS(H)::QAR1(B)
- S(a);::QAR1(B)
- S(e);N_GUARD::R1(E)
- Refutation
- S(a);
- Try
- R(E);
- Threat
- DUALS(3)
- Vars
- R(g);XS(H)::QAR1(B)
- S(a);::QAR1(B)
- S(e);N_GUARD::R1(E)
- Refutation
- S(a);XR(E)
- Try
- R(E);
- Threat
- QAB1(B)
- Vars
- K(b);S_FLIGHT,XS(H)::B(C)+R(E)
- R(g);SBLOCK,XS(H)::QAR1(B)
- S(e);N_GUARD::R1(E)
- Refutation
- S(a);
- Try
- Q(B);
- Threat
- DUALS(6)
- Vars
- R(g);OGATE,XS(H)::B(C),XR(g)
- S(e);::QAB(B)+R(E),DCHECK,XS(e)
- S(e);::QAB(B)+R(E),DCHECK
- R(g);::QAB(B)+R(E),DCHECK
- Refutation
- S(a);
- Try
- Q(B);CHECK,XS(e)
- Vars
- R(j);SBLOCK,XQ(B)::R1(E)
- Refutation
- K(b);S_FLIGHT,XQ(B)
- Try
- Actual
- R(E);
- Threat
- QAR1(B)
- Vars
- K(b);P-FLIGHT::QAR2(B)
- K(b);P-FLIGHT::B(A)+R(E),DCHECK
- S(e);N_GUARD,XP(F)::R1(E)
- S(e);N_GUARD::R1(E),XS(e)
- S(e);N_GUARD::R1(E)
- P(i);SBLOCK::QAB1(B)
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).