MESON Chess Problem Database

Problem Display
PID: 202944 (K3B2B/1p2P3/bp2PqR1/3k1N1R/N4p2/1P3P2/5n2/1n1rQ3 w - - 0 1)

Janevski, Zivko

The Problemist, 1983

K3B2B/1p2P3/bp2PqR1/3k1N1R/N4p2/1P3P2/5n2/1n1rQ3

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qg5
      • 2.Qe5#
    • 1...Qxe7
      • 2.Qe5#
    • 1...Qxe6
      • 2.Qxe6#
    • 1...Qxg6
      • 2.Qe5#
    • 1...Qf7
      • 2.Qe5#
    • 1...Qf8
      • 2.Qe5#
    • 1...Sh1
      • 2.Qe4#
    • 1...Sd3
      • 2.Qe4#
    • 1...Sh3
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sg4
      • 2.Qe4#
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qd6#
      • 1...Ke5
        • 2.Sd4#
      • 1...Kxe6
        • 2.Sg7#
      • 1...Qxe7
        • 2.Sxb6#
        • 2.Se3#
        • 2.Sxe7#
      • 1...Qxf5
        • 2.Sxb6#
        • 2.Rxf5#
      • 1...Qxe6
        • 2.Se3#
      • 1...Qe5
        • 2.Sxb6#
      • 1...Se4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(h);N_GUARD::QAR1(A)
    • Q(h);N_GUARD::QAR1(A),XQ(h)
    • Q(h);N_GUARD,XP(I)::QAR1(A)
    • Q(h);OGATE,XP(G)::QAB1(A),XQ(h)
    • Q(h);N_GUARD,XR(H)::QAR1(A)
    • Q(h);N_GUARD,P_PINB(K)::QAR1(A)
    • S(c);N_GUARD::QAB1(A)
    • S(c);N_GUARD::QAB1(A),XS(c)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(e);P-FLIGHT,P_SPINQ(h)::R(F)+S(E)
      • K(e);P_SPINQ(h),S_FLIGHT,XP(G)::S(E)
      • Q(h);XP(G)::R(F)+S(E),DCHECK
      • Q(h);::S(D),XP(g)
      • S(c);N_GUARD::QAB1(A),XS(c)
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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).