MESON Chess Problem Database

Problem Display
PID: 49145 (8/K7/8/1pk5/5Q2/8/1PnP2B1/8 w - - 0 1)

Ursic, Andrej Anton

Munchner Neueste Nachrichten, 1906

8/K7/8/1pk5/5Q2/8/1PnP2B1/8

#2

5 + 3

204 Op de Hoogte 1907
5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.b4#
    • 1...Se1
      • 2.b4#
    • 1...Sa3
      • 2.b4#
    • 1...Se3
      • 2.b4#
  • Tries
    • 1.Qe5+?
      • 1...Kc4
        • 2.Qc3#
      • 1...Kb4!
    • 1.Qc7+?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kb4!
    • 1.d3?
      • 1...Sd4
        • 2.Qf8#
      • 1...b4
        • 2.Qe5#
      • 1...Sa1
        • 2.b4#
      • 1...Se1
        • 2.b4#
      • 1...Sa3
        • 2.b4#
      • 1...Se3
        • 2.b4#
      • 1...Sb4!
  • Keys
    • 1.b3!
      • 1...Sd4
        • 2.Qf8#
      • 1...b4
        • 2.Qe5#
      • 1...Sa1
        • 2.b4#
      • 1...Se1
        • 2.b4#
      • 1...Sa3
        • 2.b4#
      • 1...Se3
        • 2.b4#
      • 1...Sb4
        • 2.d4#

Anticipated by 4877(1892), 143573(1895), 178120(1900)

This anticipates 16389(1940), 96887(1945), 24689(1987)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::P(A)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAB1(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(B);
      • Vars
        • S(a);SBLOCK::QAB(D)
        • P(b);SBLOCK::QAR2(D)
        • S(a);N_GUARD::P(A)
      • Refutation
        • S(a);
  • Actual
    • P(A);
    • Vars
      • S(a);SBLOCK::QAB(D)
      • P(b);SBLOCK::QAR2(D)
      • S(a);N_GUARD::P(A)
      • S(a);N_GUARD,SBLOCK::P(B)
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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).