MESON Chess Problem Database

Problem Display
PID: 80694 (1q6/1p1Q1pB1/Pp1n2br/1NPk1p2/K2N4/6n1/3P4/1BR5 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Rudenko, Valentin Fedorovich

StrateGems, 2008

1q6/1p1Q1pB1/Pp1n2br/1NPk1p2/K2N4/6n1/3P4/1BR5

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.Sc7#
      • 2.Qxd6#
    • 1...Qc7
      • 2.Sxc7#
    • 1...Qa8
      • 2.Sc7#
      • 2.Qxd6#
    • 1...Qc8
      • 2.Qxd6#
    • 1...Qe8
      • 2.Sc7#
      • 2.Qxd6#
    • 1...Qf8
      • 2.Sc7#
    • 1...Qg8
      • 2.Sc7#
      • 2.Qxd6#
    • 1...Qh8
      • 2.Sc7#
      • 2.Qxd6#
    • 1...Se4
      • 2.Ba2#
    • 1...bxa6
      • 2.Qc6#
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Kb4?
      • threat
        • 2.Sc3#
      • 1...bxc5+
        • 2.Rxc5#
      • 1...f6
        • 2.Qe6#
      • 1...Se4
        • 2.Ba2#
      • 1...Se2!
    • 1.d3?
      • threat
        • 2.Ba2#
      • 1...bxc5
        • 2.Sc3#
      • 1...f6
        • 2.Qe6#
      • 1...Rh2!
    • 1.axb7?
      • threat
        • 2.Qc6#
      • 1...Qa8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Qxb7
        • 2.Qxd6#
      • 1...f6
        • 2.Qe6#
      • 1...Qc7
        • 2.Sxc7#
      • 1...Qc8
        • 2.Qxd6#
      • 1...Qe8
        • 2.Sc7#
        • 2.Qxd6#
      • 1...Qa7+!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qe5#
      • 1...Sxb5
        • 2.Ba2#
      • 1...Qe8
        • 2.Qxd6#
      • 1...Sc4
        • 2.Sc3#
      • 1...Sde4
        • 2.Ba2#
      • 1...Sc8
        • 2.Ba2#
      • 1...Se8
        • 2.Ba2#
      • 1...f6
        • 2.Qe6#

There are these versions: 132438

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • Q(j);N_GUARD::S(F),XQ(j)
    • Q(j);N_GUARD::QAR1(I),XS(e)
    • Q(j);N_GUARD::S(F)
    • S(a);SBLOCK::B(A)
    • P(h);N_GUARD,XP(H)::QAB1(I)
    • P(i);N_GUARD::QAB1(I)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • S(F)
      • Vars
        • P(d);CHECK,OGATE,XP(G)::R1(B),XP(d)
        • P(i);N_GUARD::QAB1(I)
        • S(a);SBLOCK::B(A)
      • Refutation
        • S(a);
    • Try
      • P(C);
      • Threat
        • B(A)
      • Vars
        • P(d);SBLOCK,XP(G)::S(F)
        • P(i);N_GUARD::QAB1(I)
      • Refutation
        • R(g);
    • Try
      • P(H);XP(h)
      • Threat
        • QAB1(I)
      • Vars
        • Q(j);CHECK,OGATE::PXQ(j)=Q
        • Q(j);N_GUARD,XP(H)::QAR1(I),XS(e)
        • P(i);N_GUARD::QAB1(I)
        • Q(j);N_GUARD::S(F),XQ(j)
        • Q(j);N_GUARD::QAR1(I),XS(e)
      • Refutation
        • Q(j);CHECK
  • Actual
    • Q(I);N_PINS(e)
    • Threat
      • QAR1(I)
    • Vars
      • S(e);N_GUARD,XS(F)::B(A)
      • Q(j);N_GUARD,P_PINS(F)::QAR1(I),XS(e)
      • S(e);SBLOCK::S(F)
      • S(e);N_GUARD::B(A)
      • P(i);N_GUARD::QAB1(I)
HTML5 logo

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).