MESON Chess Problem Database

Problem Display
PID: 12370 (n7/pB3Q2/5n2/4Nk2/4RB1p/1N5p/K3P3/4b1q1 w - - 0 1)

Petkov, Petko Andonov

Problemas, 1978

n7/pB3Q2/5n2/4Nk2/4RB1p/1N5p/K3P3/4b1q1

#2

8 + 8

3840 Petkov Selected Compositions 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Sd4#
    • 1...Qd4
      • 2.Sxd4#
    • 1...Qf1
      • 2.Sd4#
    • 1...Qh1
      • 2.Sd4#
    • 1...Qg2
      • 2.Sd4#
    • 1...Qg3
      • 2.Sd4#
    • 1...Qg4
      • 2.Sd4#
    • 1...Qg5
      • 2.Sd4#
    • 1...Qg6
      • 2.Sd4#
    • 1...Qg7
      • 2.Sd4#
    • 1...Qg8
      • 2.Sd4#
  • Tries
    • 1.Bg5?
      • threat
        • 2.Qxf6#
      • 1...Kxg5
        • 2.Qg6#
      • 1...Qxg5
        • 2.Sd4#
      • 1...Qb6!
    • 1.Bd5?
      • threat
        • 2.Qe6#
      • 1...Qb6
        • 2.Qg6#
      • 1...Qg8
        • 2.Sd4#
      • 1...Sc7!
    • 1.Qg6+?
      • 1...Qxg6
        • 2.Sd4#
      • 1...Ke6!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sh6#
      • 1...Kxg4
        • 2.Qg6#
      • 1...Qxg4
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(b);N_GUARD,P_PINP(B)::S(C)
    • Q(b);N_GUARD::S(C),XQ(b)
    • Q(b);N_GUARD::S(C)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAR1(H),XS(f)
      • Vars
        • K(e);N_SPINS(f),P-FLIGHT,XB(E)::QAR1(H)
        • Q(b);N_GUARD,SBLOCK,XB(E)::S(C)
      • Refutation
        • Q(b);
    • Try
      • B(G);
      • Threat
        • QAB1(H)
      • Vars
        • Q(b);N_GUARD::QAB1(H)
        • Q(b);N_GUARD::S(C)
      • Refutation
        • S(h);
    • Try
      • Q(H);CHECK,N_PINS(f)
      • Vars
        • Q(b);XQ(H)::S(C)
      • Refutation
        • K(e);P_SPINS(f),S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(e);N_SPINS(f),S_FLIGHT,XS(F)::QAR2(H)
      • Q(b);N_GUARD,SBLOCK,XS(F)::S(C)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).