MESON Chess Problem Database
Problem Display
PID: 239824 (8/8/3p1PK1/3P2n1/2Bkn1NR/Qp1P4/8/1N2R3 w - - 0 1)
Erokhin, Vladimir Alekseevich
Themes-64, 1985
#2
10 + 5
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Sd2
- 2.Qa7#
- 1...Sf2
- 2.Qa7#
- 1...Sc3
- 2.Qa7#
- 1...Sg3
- 2.Qa7#
- 1...Sc5
- 2.Qb2#
- 1...Sxf6
- 2.Qa7#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...Sd2
- Tries
- 1.Sc3?
- threat
- 2.Se2#
- 2.Sb5#
- 1...Sxc3
- 2.Qa7#
- 1...Sg3
- 2.Sb5#
- 1...Kxc3!
- threat
- 1.Sf2?
- 1...Ke5
- 2.Qb2#
- 1...Sf3
- 2.Rexe4#
- 2.Rhxe4#
- 1...Sh3
- 2.Rexe4#
- 2.Rhxe4#
- 1...Se6
- 2.Rexe4#
- 2.Rhxe4#
- 1...Sf7
- 2.Rexe4#
- 2.Rhxe4#
- 1...Sh7
- 2.Rexe4#
- 2.Rhxe4#
- 1...b2!
- 1...Ke5
- 1.Sh2?
- 1...Ke5
- 2.Qb2#
- 1...Sf3
- 2.Sxf3#
- 2.Rexe4#
- 2.Rhxe4#
- 1...Sh3
- 2.Sf3#
- 2.Rexe4#
- 2.Rhxe4#
- 1...Se6
- 2.Sf3#
- 2.Rexe4#
- 2.Rhxe4#
- 1...Sf7
- 2.Sf3#
- 2.Rexe4#
- 2.Rhxe4#
- 1...Sh7
- 2.Sf3#
- 2.Rexe4#
- 2.Rhxe4#
- 1...b2!
- 1...Ke5
- 1.Sh6?
- 1...Ke5
- 2.Qb2#
- 1...Sf3
- 2.Rexe4#
- 2.Rhxe4#
- 1...Sh3
- 2.Rexe4#
- 2.Rhxe4#
- 1...Se6
- 2.Rexe4#
- 2.Rhxe4#
- 1...Sf7
- 2.Rexe4#
- 2.Rhxe4#
- 1...Sh7
- 2.Rexe4#
- 2.Rhxe4#
- 1...b2!
- 1...Ke5
- 1.Re2?
- 1...Sxf6
- 2.Qa7#
- 1...Sd2
- 2.Qa7#
- 1...Sf2
- 2.Qa7#
- 1...Sc3
- 2.Qa7#
- 1...Sg3
- 2.Qa7#
- 1...Sc5
- 2.Qb2#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...b2!
- 1...Sxf6
- 1.Re3?
- 1...Sxf6
- 2.Qa7#
- 1...Sd2
- 2.Qa7#
- 1...Sf2
- 2.Qa7#
- 1...Sc3
- 2.Qa7#
- 1...Sg3
- 2.Qa7#
- 1...Sc5
- 2.Qb2#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...b2!
- 1...Sxf6
- 1.Rhh1?
- 1...Sxf6
- 2.Qa7#
- 1...Sd2
- 2.Qa7#
- 1...Sf2
- 2.Qa7#
- 1...Sc3
- 2.Qa7#
- 1...Sg3
- 2.Qa7#
- 1...Sc5
- 2.Qb2#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...b2!
- 1...Sxf6
- 1.Rh2?
- 1...Sxf6
- 2.Qa7#
- 1...Sd2
- 2.Qa7#
- 1...Sf2
- 2.Qa7#
- 1...Sc3
- 2.Qa7#
- 1...Sg3
- 2.Qa7#
- 1...Sc5
- 2.Qb2#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...b2!
- 1...Sxf6
- 1.Rh3?
- 1...Sxf6
- 2.Qa7#
- 1...Sxh3
- 2.Rxe4#
- 1...Sd2
- 2.Qa7#
- 1...Sf2
- 2.Qa7#
- 1...Sc3
- 2.Qa7#
- 1...Sg3
- 2.Qa7#
- 1...Sc5
- 2.Qb2#
- 1...Sf3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...b2!
- 1...Sxf6
- 1.Rh5?
- 1...Sxf6
- 2.Qa7#
- 1...Sd2
- 2.Qa7#
- 1...Sf2
- 2.Qa7#
- 1...Sc3
- 2.Qa7#
- 1...Sg3
- 2.Qa7#
- 1...Sc5
- 2.Qb2#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...b2!
- 1...Sxf6
- 1.Rh6?
- 1...Sxf6
- 2.Qa7#
- 1...Sd2
- 2.Qa7#
- 1...Sf2
- 2.Qa7#
- 1...Sc3
- 2.Qa7#
- 1...Sg3
- 2.Qa7#
- 1...Sc5
- 2.Qb2#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...b2!
- 1...Sxf6
- 1.Rh7?
- 1...Sxf6
- 2.Qa7#
- 1...Sxh7
- 2.Rxe4#
- 1...Sd2
- 2.Qa7#
- 1...Sf2
- 2.Qa7#
- 1...Sc3
- 2.Qa7#
- 1...Sg3
- 2.Qa7#
- 1...Sc5
- 2.Qb2#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...b2!
- 1...Sxf6
- 1.Rh8?
- 1...Sxf6
- 2.Qa7#
- 1...Sd2
- 2.Qa7#
- 1...Sf2
- 2.Qa7#
- 1...Sc3
- 2.Qa7#
- 1...Sg3
- 2.Qa7#
- 1...Sc5
- 2.Qb2#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...b2!
- 1...Sxf6
- 1.Qb2+?
- 1...Sc3
- 2.Qf2#
- 1...Kc5!
- 1...Sc3
- 1.Qb4?
- 1...Sxf6
- 2.Qb6#
- 1...Sd2
- 2.Qb6#
- 1...Sf2
- 2.Qb6#
- 1...Sc3
- 2.Qb6#
- 1...Sg3
- 2.Qb6#
- 1...Sc5
- 2.Qc3#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...b2!
- 1...Sxf6
- 1.Qa5?
- 1...Sxf6
- 2.Qb6#
- 2.Qa7#
- 1...Sd2
- 2.Qb6#
- 2.Qa7#
- 1...Sf2
- 2.Qb6#
- 2.Qa7#
- 1...Sc3
- 2.Qb6#
- 2.Qa7#
- 1...Sg3
- 2.Qb6#
- 2.Qa7#
- 1...Sc5
- 2.Qc3#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sf7
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...b2!
- 1...Sxf6
- 1.f7?
- 1...Sxf7
- 2.Rxe4#
- 1...Sd2
- 2.Qa7#
- 1...Sf2
- 2.Qa7#
- 1...Sc3
- 2.Qa7#
- 1...Sg3
- 2.Qa7#
- 1...Sc5
- 2.Qb2#
- 1...Sf6
- 2.Qa7#
- 1...Sf3
- 2.Rxe4#
- 1...Sh3
- 2.Rxe4#
- 1...Se6
- 2.Rxe4#
- 1...Sh7
- 2.Rxe4#
- 1...b2!
- 1...Sxf7
- 1.Sc3?
- Keys
- 1.Se5!
- threat
- 2.Sc6#
- 1...Kxe5
- 2.Qb2#
- 1...dxe5
- 2.Qa7#
- threat
- 1.Se5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 11
- Sets
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB(C)
- S(c);N_GUARD,XP(I)::QAB(C)
- S(d);N_GUARD::R1(B),XS(c)
- Tries
- Try
- S(A);
- Threat
- DUALS(2)
- Vars
- S(c);N_GUARD,SBLOCK,XS(A)::QAB(C)
- S(c);::S(A)
- Refutation
- K(b);P_SPINP(a),S_FLIGHT,XS(A)
- Try
- S(F);P_PINS(c)
- Vars
- K(b);S_FLIGHT::QAB(C)
- Refutation
- P(a);
- Try
- S(F);P_PINS(c)
- Vars
- K(b);S_FLIGHT::QAB(C)
- Refutation
- P(a);
- Try
- S(F);P_PINS(c)
- Vars
- K(b);S_FLIGHT::QAB(C)
- Refutation
- P(a);
- Try
- R(B);
- Vars
- S(c);N_GUARD,XP(I)::QAB(C)
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- R(B);
- Vars
- S(c);N_GUARD,XP(I)::QAB(C)
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- R(G);
- Vars
- S(c);N_GUARD,XP(I)::QAB(C)
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- R(G);
- Vars
- S(c);N_GUARD,XP(I)::QAB(C)
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- R(G);
- Vars
- S(c);N_GUARD,XP(I)::QAB(C)
- S(d);N_GUARD,XR(G)::R1(B),XS(c)
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- R(G);
- Vars
- S(c);N_GUARD,XP(I)::QAB(C)
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- R(G);
- Vars
- S(c);N_GUARD,XP(I)::QAB(C)
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- R(G);
- Vars
- S(c);N_GUARD,XP(I)::QAB(C)
- S(d);N_GUARD,XR(G)::R1(B),XS(c)
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- R(G);
- Vars
- S(c);N_GUARD,XP(I)::QAB(C)
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- Q(C);CHECK
- Vars
- S(c);N_GUARD,P_SPINS(c)::QAB(C)
- Refutation
- K(b);S_FLIGHT
- Try
- Q(C);
- Vars
- S(c);N_GUARD,XP(I)::QAB(C)
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB1(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- Q(C);
- Vars
- S(c);N_GUARD,SBLOCK::QAB1(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- P(I);
- Vars
- S(d);N_GUARD,XP(I)::R1(B),XS(c)
- S(c);N_GUARD::QAB(C)
- S(c);N_GUARD,SBLOCK::QAB(C)
- S(d);N_GUARD::R1(B),XS(c)
- Refutation
- P(a);
- Try
- Actual
- S(F);P_PINS(c)
- Threat
- S(F)
- Vars
- K(b);S_FLIGHT,XS(F)::QAB(C)
- P(e);SBLOCK,XS(F)::QAB(C)
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).