MESON Chess Problem Database

Problem Display
PID: 175595 (3K4/3N4/4p3/3kPp2/P1p5/2Q3P1/1P6/8 w - - 0 1)

van Dijk, Johannes

Haagsche Courant, 1900

3K4/3N4/4p3/3kPp2/P1p5/2Q3P1/1P6/8

#2

7 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sf6#
    • 1...Kc6
      • 2.Qf3#
  • Tries
    • 1.Kc7?
      • 1...Ke4
        • 2.Sf6#
      • 1...f4!
    • 1.Kc8?
      • 1...Ke4
        • 2.Sf6#
      • 1...Kc6
        • 2.Qf3#
        • 2.Qxc4#
      • 1...f4!
    • 1.Qd2+?
      • 1...Kc6
        • 2.Qg2#
      • 1...Ke4!
    • 1.Qd3+?
      • 1...Kc6
        • 2.Qf3#
      • 1...cxd3!
    • 1.b4?
      • 1...Ke4
        • 2.Sf6#
      • 1...Kc6
        • 2.Qf3#
      • 1...cxb4 ep
        • 2.Sf6#
      • 1...f4!
  • Keys
    • 1.b3!
      • threat
        • 2.Qxc4#
      • 1...Ke4
        • 2.Sf6#
      • 1...Kc6
        • 2.Qf3#
      • 1...cxb3
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(F)
    • K(b);P_SPINP(a),S_FLIGHT::QAB(B)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::S(F)
      • Refutation
        • P(c);
    • Try
      • K(G);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::S(F)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(B)
      • Refutation
        • P(a);XQ(B)
    • Try
      • P(A);
      • Vars
        • K(b);S_FLIGHT::S(F)
        • K(b);P_SPINP(a),S_FLIGHT::QAB(B)
        • P(a);EP,XP(A)::S(F)
      • Refutation
        • P(c);
  • Actual
    • P(A);
    • Threat
      • QAB1(B),XP(a)
    • Vars
      • K(b);S_FLIGHT::S(F)
      • K(b);P_SPINP(a),S_FLIGHT::QAB(B)
      • P(a);XP(A)::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).