MESON Chess Problem Database

Problem Display
PID: 175598 (4Q3/8/1N1Pqrp1/K4p2/2p1kB2/2n1P3/2P3P1/8 w - - 0 1)

van Dijk, Johannes

Het Familieblad, 1900

4Q3/8/1N1Pqrp1/K4p2/2p1kB2/2n1P3/2P3P1/8

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5+
      • 2.Qxe5#
    • 1...Rf7
      • 2.Qxe6#
    • 1...Rf8
      • 2.Qxe6#
  • Tries
    • 1.Qc6+?
      • 1...Sd5
        • 2.Qxc4#
      • 1...Qd5+!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sxf6#
      • 1...Qe5+
        • 2.Qxe5#
      • 1...Kd5
        • 2.Qa8#
      • 1...Rf7
        • 2.Qxe6#
      • 1...Rf8
        • 2.Qxe6#
      • 1...Sd5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(e);CHECK,OGATE::QAR1(H),XQ(e)
    • R(f);N_GUARD::QAR2(H),XQ(e)
  • Tries
    • Try
      • Q(H);CHECK,N_PINQ(e)
      • Vars
        • S(a);P_SPINS(a),S_CUTQ(e)::QAR2(H),XP(b)
      • Refutation
        • Q(e);CHECK,P_SPINQ(e)
  • Actual
    • S(F);
    • Threat
      • S(F),XR(f)
    • Vars
      • Q(e);CHECK,OGATE::QAR1(H),XQ(e)
      • K(c);N_SPINQ(e),S_FLIGHT::QAB(H)
      • R(f);N_GUARD::QAR2(H),XQ(e)
      • S(a);SBLOCK::S(F)
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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).