MESON Chess Problem Database

Problem Display
PID: 100890 (7b/B7/8/2N2P2/Rppk4/6P1/4P3/3K3Q w - - 0 1)

Dennis, Charles Edwin

Good Companions, 1921

7b/B7/8/2N2P2/Rppk4/6P1/4P3/3K3Q

#2

8 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Qxh8#
    • 1...Ke3
      • 2.Qg1#
    • 1...c3
      • 2.Qe4#
  • Tries
    • 1.Se4+?
      • 1...Ke5
        • 2.Ra5#
      • 1...Kd5!
    • 1.Qf3?
      • threat
        • 2.Sd7#
      • 1...c3
        • 2.Qe4#
      • 1...Ke5!
  • Keys
    • 1.Ra5!
      • threat
        • 2.Sa4#
        • 2.Se4#
      • 1...Kc3
        • 2.Qxh8#
      • 1...Ke3
        • 2.Qg1#
      • 1...Ke5
        • 2.Se4#
      • 1...c3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB(B),XB(d)
    • K(c);S_FLIGHT::QAB(B)
    • P(b);P_SPINP(a),SBLOCK::QAR1(B)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);S_FLIGHT::R(E)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • B(H)+S(F)
      • Vars
        • P(b);P_SPINP(a),SBLOCK::QAR1(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(E);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);S_FLIGHT::QAB(B),XB(d)
      • K(c);S_FLIGHT::QAB(B)
      • K(c);S_FLIGHT::R(E)+S(F)
      • P(b);SBLOCK::QAR1(B)
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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).