MESON Chess Problem Database

Problem Display
PID: 103813 (8/R1P4r/2P1k1bB/2K1N3/3Q4/1r1P4/B7/8 w - - 0 1)

van Dijk, Nils Gustav Gerard

Thema Danicum, 1985

8/R1P4r/2P1k1bB/2K1N3/3Q4/1r1P4/B7/8

#2

9 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Qd6#
  • Tries
    • 1.Bxb3+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Ke7
        • 2.Qd8#
      • 1...Kf6!
    • 1.c8Q+?
      • 1...Kf6
        • 2.Sf3#
        • 2.Sc4#
        • 2.Sg4#
        • 2.Sf7#
        • 2.Qd6#
      • 1...Rd7!
    • 1.c8B+?
      • 1...Kf6
        • 2.Sf3#
        • 2.Sc4#
        • 2.Sg4#
        • 2.Sf7#
        • 2.Qd6#
      • 1...Rd7!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qf6#
      • 1...Kf5
        • 2.Qe4#
      • 1...Ke7
        • 2.Qd7#
      • 1...Kf7
        • 2.c8Q#
      • 1...Rf7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(c);SBLOCK::QAR1(C)
  • Tries
    • Try
      • B(A);CHECK,XR(a)
      • Vars
        • K(b);S_FLIGHT::QAR1(C)
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(I);CHECK
      • Refutation
        • R(d);
    • Try
      • P(I);CHECK
      • Refutation
        • R(d);
  • Actual
    • S(E);
    • Threat
      • QAR1(C)
    • Vars
      • K(b);N_SPINR(a),S_FLIGHT::QAB1(C)
      • K(b);N_SPINR(a),P-FLIGHT::QAR1(C)
      • K(b);S_FLIGHT::P=Q
      • R(d);SBLOCK::QAR1(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).