MESON Chess Problem Database

Problem Display
PID: 9552 (8/3P4/1p1P1p2/rp1k2nq/P1R3P1/7p/4Q2B/2RK4 w - - 0 1)

van Dijk, Johannes

HM., Leipziger Tageblatt, 1905

8/3P4/1p1P1p2/rp1k2nq/P1R3P1/7p/4Q2B/2RK4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Se6
      • 2.Qf3#
      • 2.Qe4#
    • 1...Sf7
      • 2.Qe4#
    • 1...Sh7
      • 2.Qe4#
    • 1...bxc4
      • 2.Qxc4#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Rc5+?
      • 1...Kd4
        • 2.Bg1#
      • 1...bxc5!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Rb4#
      • 1...Qxg4+
        • 2.Rxg4#
      • 1...Ke6
        • 2.Rc7#
      • 1...Rxa4
        • 2.Rxa4#
      • 1...bxc4
        • 2.Qxc4#
      • 1...b4
        • 2.Rxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • S(e);N_GUARD::QAB1(C)
    • S(e);N_GUARD::QAB1(C),XS(e)
    • P(c);OGATE,XR(F)::QAB1(C),XP(c)
    • P(h);N_GUARD::QAR1(C)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(d);P-FLIGHT::B(D)
      • Refutation
        • P(g);XR(F)
  • Actual
    • Q(C);P_SPINP(G)
    • Threat
      • QAB(C)+R(F)
    • Vars
      • Q(f);CHECK,OGATE,XP(G)::QAB(C)+R(F),XQ(f)
      • K(d);S_FLIGHT::QAB(C)+R(F)
      • R(b);OGATE,XP(E)::QAB(C)+R(F),XR(b)
      • P(c);OGATE,P_SPINP(c),XR(F)::QAB1(C),XP(c)
      • P(c);::QAB(C)+R(F),XP(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).