MESON Chess Problem Database

Problem Display
PID: 215819 (1Q1B1R1n/5b2/3Nk2K/6p1/2P1p1N1/3n3B/3R4/3q2b1 w - - 0 1)

den Toom, Bas

Probleemblad, 1980

1Q1B1R1n/5b2/3Nk2K/6p1/2P1p1N1/3n3B/3R4/3q2b1

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd7
      • 2.Se5#
    • 1...Sc1
      • 2.Qc8#
    • 1...Se1
      • 2.Qc8#
    • 1...Sb2
      • 2.Qc8#
    • 1...Sf2
      • 2.Qc8#
    • 1...Sb4
      • 2.Qc8#
    • 1...Sf4
      • 2.Qc8#
  • Tries
    • 1.Sb7?
      • threat
        • 2.Qc8#
      • 1...Kf5
        • 2.Se3#
      • 1...Kd7
        • 2.Se5#
      • 1...Qxg4
        • 2.Bxg4#
      • 1...Be8
        • 2.Qd6#
      • 1...Sc5
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Qa4!
    • 1.Re8+?
      • 1...Kd7
        • 2.Se5#
        • 2.Qc7#
      • 1...Bxe8!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qc8#
      • 1...Kf5
        • 2.Se3#
      • 1...Kd7
        • 2.Se5#
      • 1...Qxg4
        • 2.Bxg4#
      • 1...Be8
        • 2.Qd6#
      • 1...Sc5
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • K(f);S_FLIGHT::B(B)+S(D),DCHECK
    • S(c);::QAB(G)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB(G)
      • Vars
        • K(f);P_SPINB(g),S_FLIGHT::B(B)+S(D),DCHECK
        • K(f);P_SPINS(c),S_FLIGHT::B(B)+S(D),DCHECK
        • Q(a);OGATE,P_SPINQ(a),XS(D)::B(B),XQ(a)
        • B(g);::QAR1(G)
        • S(c);N_GUARD::QAR1(G)
        • S(c);N_GUARD::QAR1(G),XS(c)
      • Refutation
        • Q(a);
    • Try
      • R(I);CHECK
      • Refutation
        • B(g);XR(I)
  • Actual
    • S(E);
    • Threat
      • QAB(G)
    • Vars
      • K(f);P_SPINB(g),S_FLIGHT::B(B)+S(D),DCHECK
      • K(f);P_SPINS(c),S_FLIGHT::B(B)+S(D),DCHECK
      • Q(a);OGATE,P_SPINQ(a),XS(D)::B(B),XQ(a)
      • B(g);::QAR1(G)
      • S(c);N_GUARD::QAR1(G)
      • S(c);N_GUARD::QAR1(G),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).