MESON Chess Problem Database

Problem Display
PID: 175164 (6N1/2KQP2n/4p3/5k1n/6Rp/7p/4P2P/8 w - - 0 1)

van Dijk, Johannes

La Strategie, 1902

6N1/2KQP2n/4p3/5k1n/6Rp/7p/4P2P/8

#2

7 + 6

84 De Maasbode 1914
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qb5#
  • Tries
    • 1.Sh6+?
      • 1...Ke5
        • 2.Qd4#
      • 1...Kf6!
    • 1.Qb5+?
      • 1...e5
        • 2.Qd7#
      • 1...Kxg4!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Qe4#
        • 2.Qb5#
      • 1...Kxg4!
    • 1.Qd4?
      • threat
        • 2.Sh6#
        • 2.Qe4#
      • 1...Sf4
        • 2.Sh6#
        • 2.Qxf4#
      • 1...e5
        • 2.Qd7#
      • 1...Sg3
        • 2.Sh6#
        • 2.Qf4#
      • 1...S5f6
        • 2.Sh6#
        • 2.Qf4#
      • 1...S7f6
        • 2.Sh6#
      • 1...Sg5!
    • 1.e4+?
      • 1...Ke5
        • 2.Qd6#
      • 1...Kxg4!
  • Keys
    • 1.Qd2!
      • 1...Kxg4
        • 2.Sh6#
      • 1...Ke5
        • 2.Qa5#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sg3
        • 2.Qf4#
      • 1...S5f6
        • 2.Qf4#
      • 1...Sg7
        • 2.Qf4#
      • 1...S7f6
        • 2.Qg5#
      • 1...Sf8
        • 2.Qg5#
      • 1...e5
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINP(e),P-FLIGHT::QAR(E)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);N_SPINP(e),P-FLIGHT::QAB1(E)
      • Refutation
        • K(c);N_SPINP(e),P-FLIGHT
    • Try
      • Q(E);CHECK,N_PINP(e)
      • Vars
        • P(e);OGATEB,P_SPINP(e),SBLOCK::QAB(E)
      • Refutation
        • K(c);S_FLIGHT,XR(C)
    • Try
      • Q(E);CHECK,N_PINP(e)
      • Refutation
        • K(c);S_FLIGHT,XR(C)
    • Try
      • Q(E);N_PINP(e)
      • Threat
        • DUALS(2)
      • Vars
        • P(e);OGATEB,SBLOCK::QAB(E)
        • S(f);::S(G)
      • Refutation
        • S(f);
    • Try
      • P(A);CHECK
      • Vars
        • K(c);N_SPINP(e),P-FLIGHT::QAB1(E)
      • Refutation
        • K(c);S_FLIGHT,XR(C)
  • Actual
    • Q(E);N_PINP(e)
    • Vars
      • K(c);S_FLIGHT,XR(C)::S(G)
      • K(c);P-FLIGHT::QAR(E)
      • S(d);N_GUARD::QAR1(E),XS(d)
      • S(f);N_GUARD::QAR1(E),XS(f)
      • S(d);N_GUARD::QAR1(E)
      • S(f);N_GUARD::QAR1(E)
      • P(e);OGATEB,SBLOCK::QAB(E)
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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).