MESON Chess Problem Database

Problem Display
PID: 214785 (n3B3/Q5N1/1pPk4/4p1P1/4P3/3K4/8/8 w - - 0 1)

Braune, Robert

Detroit Free Press, 1878

n3B3/Q5N1/1pPk4/4p1P1/4P3/3K4/8/8

#2

7 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc7
      • 2.Qa3#
  • Tries
    • 1.Kc4?
      • threat
        • 2.Qd7#
      • 1...Sc7
        • 2.Qa3#
      • 1...b5+!
    • 1.Sf5+?
      • 1...Ke6
        • 2.Bf7#
        • 2.Qa2#
        • 2.Qd7#
        • 2.Qe7#
        • 2.Qf7#
      • 1...Kc5!
    • 1.Se6?
      • threat
        • 2.Qd7#
      • 1...Kxe6
        • 2.Qd7#
      • 1...Sc7!
  • Keys
    • 1.c7!
      • 1...Kc5
        • 2.Qa3#
      • 1...Ke7
        • 2.Qa3#
      • 1...Sxc7
        • 2.Qa3#
      • 1...b5
        • 2.c8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(d);SBLOCK::QAB(E)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR1(E)
      • Vars
        • S(d);SBLOCK::QAB(E)
      • Refutation
        • P(b);CHECK
    • Try
      • S(F);CHECK
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
    • Try
      • S(F);
      • Threat
        • QAR1(E)
      • Vars
        • K(c);P-FLIGHT,XS(F)::QAB1(E)
      • Refutation
        • S(d);
  • Actual
    • P(D);
    • Vars
      • K(c);P_SPINP(b),S_FLIGHT::QAB(E)
      • K(c);S_FLIGHT::QAB(E)
      • S(d);SBLOCK,XP(D)::QAB(E)
      • P(b);::P=S
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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).