MESON Chess Problem Database

Problem Display
PID: 5104 (5N1K/Q5np/n1RP3N/4k3/2P2p1b/5P2/8/8 w - - 0 1)

Colpa, Johannes J

2nd Prize, Tijdschrift vd NSB, 1899

5N1K/Q5np/n1RP3N/4k3/2P2p1b/5P2/8/8

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qe7#
      • 2.Qxg7#
    • 1...Be1
      • 2.Qxg7#
    • 1...Bf2
      • 2.Qxg7#
    • 1...Bg3
      • 2.Qxg7#
    • 1...Sb4
      • 2.Qa1#
    • 1...Sc5
      • 2.Qa1#
    • 1...Sc7
      • 2.Qa1#
    • 1...Sb8
      • 2.Qa1#
    • 1...Sf5
      • 2.Sg4#
    • 1...Se6
      • 2.Sd7#
  • Tries
    • 1.Qe3+?
      • 1...Kf6
        • 2.Qe7#
      • 1...fxe3!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qa1#
      • 1...Kf6
        • 2.Qxg7#
      • 1...Bf2
        • 2.Qxg7#
      • 1...Be1
        • 2.Qxg7#
      • 1...Sf5
        • 2.Sg4#
      • 1...Se6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • B(b);N_GUARD::QAB(F),XS(e)
    • S(d);OGATE::QAB(F)
    • S(e);SBLOCK::S(E)
    • S(e);SBLOCK::S(G)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(F)
      • Refutation
        • P(a);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)
    • Vars
      • K(c);S_FLIGHT::QAB1(F),XS(e)
      • B(b);N_GUARD::QAB(F),XS(e)
      • S(e);SBLOCK::S(E)
      • S(e);SBLOCK::S(G)
HTML5 logo

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).