MESON Chess Problem Database
Problem Display
PID: 179729 (7Q/p2N4/2pPn1P1/R1BkP3/1K2n3/4p3/4N3/8 w - - 0 1)
Kopnin, Aleksey Grigorevich
Popkov, Nikolai Nikolaevich
3rd Comm., Sahs (Latvia), 1978
#2
9 + 6
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Sd2
- 2.Sc3#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sg3
- 2.Sc3#
- 1...S4xc5
- 2.Qh1#
- 1...S4g5
- 2.Sc3#
- 1...Sxd6
- 2.Sc3#
- 1...Sf6
- 2.Sc3#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...S6xc5
- 2.Qg8#
- 1...S6g5
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...Sd8
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...a6
- 2.Sb6#
- 1...Sd2
- Tries
- 1.Bxe3+?
- 1...S4c5
- 2.Sc3#
- 2.Qh1#
- 1...S6c5
- 2.Sf4#
- 2.Qg8#
- 1...c5+!
- 1...S4c5
- 1.Bd4+?
- 1...S4c5
- 2.Sf6#
- 2.Qh1#
- 1...S6c5
- 2.Qg8#
- 1...c5+!
- 1...S4c5
- 1.Bb6+?
- 1...S4c5
- 2.Qh1#
- 1...S6c5
- 2.Qg8#
- 1...c5+!
- 1...S4c5
- 1.Bxa7+?
- 1...S4c5
- 2.Qh1#
- 1...S6c5
- 2.Qg8#
- 1...c5+!
- 1...S4c5
- 1.Rb5?
- 1...S4xc5
- 2.Qh1#
- 1...Sxd6
- 2.Sc3#
- 1...S6xc5
- 2.Qg8#
- 1...cxb5
- 2.Qa8#
- 1...Sd2
- 2.Sc3#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sg3
- 2.Sc3#
- 1...S4g5
- 2.Sc3#
- 1...Sf6
- 2.Sc3#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...S6g5
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...Sd8
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...a6
- 2.Sb6#
- 1...a5+!
- 1...S4xc5
- 1.Qg7?
- 1...Sxd6
- 2.Sc3#
- 1...S6xc5
- 2.Qf7#
- 2.Qg8#
- 1...Sxg7
- 2.Sf4#
- 1...Sd2
- 2.Sc3#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sg3
- 2.Sc3#
- 1...S4g5
- 2.Sc3#
- 1...Sf6
- 2.Sc3#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...S6g5
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Sd8
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...a6
- 2.Sb6#
- 1...S4xc5!
- 1...Sxd6
- 1.Qh1?
- threat
- 2.Sc3#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...Sg5
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...Sd8
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...Sxc5!
- threat
- 1.Qh2?
- 1...S4xc5
- 2.Sf6#
- 2.Qh1#
- 2.Qg2#
- 1...Sxd6
- 2.Sc3#
- 2.Sf6#
- 1...Sd2
- 2.Sc3#
- 2.Sf6#
- 1...Sf2
- 2.Sc3#
- 2.Sf6#
- 1...Sc3
- 2.Sxc3#
- 2.Sf6#
- 1...Sg3
- 2.Sc3#
- 1...S4g5
- 2.Sc3#
- 2.Sf6#
- 1...Sf6
- 2.Sc3#
- 2.Sxf6#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...S6g5
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...Sd8
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...a6
- 2.Sb6#
- 1...S6xc5!
- 1...S4xc5
- 1.Qh5?
- 1...S4xc5
- 2.Sf6#
- 2.Qf3#
- 2.Qh1#
- 1...Sxd6
- 2.Sc3#
- 2.Sf6#
- 1...Sd2
- 2.Sc3#
- 2.Sf6#
- 1...Sf2
- 2.Sc3#
- 2.Sf6#
- 1...Sc3
- 2.Sxc3#
- 2.Sf6#
- 1...Sg3
- 2.Sc3#
- 2.Sf6#
- 1...S4g5
- 2.Sc3#
- 1...Sf6
- 2.Sc3#
- 2.Sxf6#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...S6g5
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...Sd8
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...a6
- 2.Sb6#
- 1...S6xc5!
- 1...S4xc5
- 1.Qh7?
- 1...S4xc5
- 2.Qh1#
- 1...Sxd6
- 2.Sc3#
- 1...S6xc5
- 2.Qg8#
- 2.Qf7#
- 1...Sd2
- 2.Sc3#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sg3
- 2.Sc3#
- 1...S4g5
- 2.Sc3#
- 1...Sf6
- 2.Sc3#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...S6g5
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...Sd8
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...a6!
- 1...S4xc5
- 1.Qf8?
- 1...S4xc5
- 2.Qf3#
- 1...Sxd6
- 2.Sc3#
- 1...S6xc5
- 2.Qf7#
- 2.Qg8#
- 1...Sxf8
- 2.Sf4#
- 1...Sd2
- 2.Sc3#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sg3
- 2.Sc3#
- 1...S4g5
- 2.Sc3#
- 1...Sf6
- 2.Sc3#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...S6g5
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...Sd8
- 2.Sf4#
- 1...a6!
- 1...S4xc5
- 1.Qg8?
- threat
- 2.Sf4#
- 1...Sxd6
- 2.Sc3#
- 1...Sd2
- 2.Sc3#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sg3
- 2.Sc3#
- 1...Sg5
- 2.Sc3#
- 1...Sf6
- 2.Sc3#
- 1...Sxc5!
- threat
- 1.g7?
- 1...S4xc5
- 2.Qh1#
- 1...Sxd6
- 2.Sc3#
- 1...S6xc5
- 2.Qg8#
- 2.g8Q#
- 2.g8B#
- 1...Sxg7
- 2.Sf4#
- 1...Sd2
- 2.Sc3#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sg3
- 2.Sc3#
- 1...S4g5
- 2.Sc3#
- 1...Sf6
- 2.Sc3#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...S6g5
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Sd8
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...a6!
- 1...S4xc5
- 1.Bxe3+?
- Keys
- 1.Qf6!
- 1...S4xc5
- 2.Qf3#
- 1...Sxd6
- 2.Sc3#
- 1...Sxf6
- 2.Sc3#
- 1...S6xc5
- 2.Qf7#
- 1...Sd2
- 2.Sc3#
- 1...Sf2
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sg3
- 2.Sc3#
- 1...S4g5
- 2.Sc3#
- 1...Sd4
- 2.Sf4#
- 1...Sf4
- 2.Sxf4#
- 1...S6g5
- 2.Sf4#
- 1...Sc7
- 2.Sf4#
- 1...Sg7
- 2.Sf4#
- 1...Sd8
- 2.Sf4#
- 1...Sf8
- 2.Sf4#
- 1...a6
- 2.Sb6#
- 1...S4xc5
- 1.Qf6!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(b);OGATEB,P_SPINS(b),XB(D)::QAB(I)
- S(b);N_GUARD,XP(F)::S(A)
- S(e);N_GUARD::S(A)
- S(e);N_GUARD::S(A),XS(e)
- S(e);OGATEB,P_SPINS(e),XB(D)::QAB(I)
- P(f);N_GUARD::S(H)
- Tries
- Try
- B(D);CHECK,XP(a)
- Refutation
- P(d);CHECK,P_SPINP(d)
- Try
- B(D);CHECK
- Vars
- S(e);P_SPINS(e),S_CUTP(d),S_CUTS(b)::QAB(I)
- Refutation
- P(d);CHECK,P_SPINP(d)
- Try
- B(D);CHECK
- Vars
- S(b);P_SPINS(b),S_CUTP(d),S_CUTS(e)::QAB(I)
- S(e);P_SPINS(e),S_CUTP(d),S_CUTS(b)::QAB(I)
- Refutation
- P(d);CHECK,P_SPINP(d)
- Try
- B(D);CHECK,XP(f)
- Vars
- S(b);P_SPINS(b),S_CUTP(d),S_CUTS(e)::QAB(I)
- S(e);P_SPINS(e),S_CUTP(d),S_CUTS(b)::QAB(I)
- Refutation
- P(d);CHECK,P_SPINP(d)
- Try
- R(C);
- Vars
- S(b);OGATEB,P_SPINS(b),XB(D)::QAB(I)
- S(b);N_GUARD,XP(F)::S(A)
- S(e);OGATEB,P_SPINS(e),XB(D)::QAB(I)
- P(d);OGATEB,XR(C)::QAB(I)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(e);N_GUARD::S(A)
- S(e);N_GUARD::S(A),XS(e)
- P(f);N_GUARD::S(H)
- Refutation
- P(f);CHECK
- Try
- Q(I);
- Vars
- S(b);N_GUARD,XP(F)::S(A)
- S(e);N_GUARD,XQ(I)::S(A)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(e);N_GUARD::S(A)
- S(e);N_GUARD::S(A),XS(e)
- P(f);N_GUARD::S(H)
- Refutation
- S(b);P_SPINS(b),XB(D)
- Try
- Q(I);P_PINS(b)
- Threat
- S(A)
- Vars
- S(e);N_GUARD::S(A)
- S(e);N_GUARD::S(A),XS(e)
- Refutation
- S(e);XB(D)
- Try
- Q(I);
- Vars
- S(b);N_GUARD::S(A)
- S(e);N_GUARD::S(A)
- S(e);N_GUARD::S(A),XS(e)
- P(f);N_GUARD::S(H)
- Refutation
- S(e);P_SPINS(e),XB(D)
- Try
- Q(I);
- Vars
- S(b);N_GUARD::S(A)
- S(e);N_GUARD::S(A)
- S(e);N_GUARD::S(A),XS(e)
- P(f);N_GUARD::S(H)
- Refutation
- S(e);P_SPINS(e),XB(D)
- Try
- Q(I);
- Vars
- S(b);OGATEB,P_SPINS(b),XB(D)::QAB(I)
- S(b);N_GUARD,XP(F)::S(A)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(e);N_GUARD::S(A)
- S(e);N_GUARD::S(A),XS(e)
- Refutation
- P(f);
- Try
- Q(I);
- Vars
- S(b);OGATEB,P_SPINS(b),XB(D)::QAB(I)
- S(b);N_GUARD,XP(F)::S(A)
- S(e);N_GUARD,XQ(I)::S(A)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(e);N_GUARD::S(A)
- S(e);N_GUARD::S(A),XS(e)
- Refutation
- P(f);
- Try
- Q(I);P_PINS(e)
- Threat
- S(A)
- Vars
- S(b);N_GUARD,XP(F)::S(A)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Refutation
- S(b);N_SPINS(e),P_SPINS(b),XB(D)
- Try
- P(G);
- Vars
- S(b);OGATEB,P_SPINS(b),XB(D)::QAB(I)
- S(b);N_GUARD,XP(F)::S(A)
- S(e);N_GUARD,XP(G)::S(A)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(e);N_GUARD::S(A)
- S(e);N_GUARD::S(A),XS(e)
- Refutation
- P(f);
- Try
- Actual
- Q(I);
- Vars
- S(b);OGATEB,P_SPINS(b),XB(D)::QAB(I)
- S(b);N_GUARD,XP(F)::S(A)
- S(b);N_GUARD,XQ(I)::S(A)
- S(e);OGATEB,P_SPINS(e),XB(D)::QAB(I)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(e);N_GUARD::S(A)
- S(e);N_GUARD::S(A),XS(e)
- P(f);N_GUARD::S(H)
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).