MESON Chess Problem Database

Problem Display
PID: 175742 (3n1N2/7Q/Rn6/3k4/4N3/8/P5K1/B7 w - - 0 1)

van Dijk, Johannes

Tijdschrift vd NSB, 1898

3n1N2/7Q/Rn6/3k4/4N3/8/P5K1/B7

#2

7 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qd7#
  • Tries
    • 1.Ra5+?
      • 1...Kc6
        • 2.Rc5#
      • 1...Kc4!
    • 1.Qf5+?
      • 1...Kc6
        • 2.Qd7#
      • 1...Kc4!
    • 1.Qf7+?
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kc6
        • 2.Qd7#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sxf7!
  • Keys
    • 1.Qh3!
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kc6
        • 2.Qd7#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Sd7
        • 2.Qd3#
      • 1...Sa8
        • 2.Qd3#
      • 1...Sc8
        • 2.Qd3#
      • 1...Sc6
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sb7
        • 2.Qe6#
      • 1...Sf7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • K(a);P_SPINS(b),S_FLIGHT::QAB1(F)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);P_SPINS(b),S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(F)
        • K(a);P_SPINS(b),S_FLIGHT::QAB1(F)
        • S(c);N_GUARD,P_SPINS(c)::QAB1(F),XS(c)
      • Refutation
        • S(c);XQ(F)
  • Actual
    • Q(F);
    • Vars
      • K(a);S_FLIGHT::QAB1(F)
      • K(a);OGATEB,S_FLIGHT,XS(D)::QAB1(F)
      • K(a);P_SPINS(b),S_FLIGHT::QAB1(F)
      • S(b);::QAR2(F)
      • S(c);N_GUARD::QAB1(F)
      • S(c);N_GUARD::QAB1(F),XS(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).