MESON Chess Problem Database

Problem Display
PID: 224692 (8/8/R1B2B2/1pkPN3/4P3/3P4/6KQ/8 w - - 0 1)

Ernst, Heinrich

The Sunny South, 1887

8/8/R1B2B2/1pkPN3/4P3/3P4/6KQ/8

#2

9 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Sd7#
    • 1...b4
      • 2.Sd7#
  • Tries
    • 1.Ra4?
      • threat
        • 2.Sd7#
      • 1...Kb6
        • 2.Sd7#
      • 1...Kd6
        • 2.Sd7#
      • 1...bxa4!
    • 1.Qg3?
      • 1...Kd4
        • 2.Sd7#
      • 1...Kd6
        • 2.Sd7#
      • 1...b4
        • 2.Sd7#
      • 1...Kb4!
  • Keys
    • 1.Ra3!
      • 1...Kb4
        • 2.Be7#
      • 1...Kd4
        • 2.Qg1#
      • 1...Kb6
        • 2.Sd7#
      • 1...Kd6
        • 2.Sd7#
      • 1...b4
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB(B)+S(F)
    • P(a);SBLOCK::S(F)
  • Tries
    • Try
      • R(G);
      • Threat
        • S(F)
      • Vars
        • K(b);S_FLIGHT::S(F)
        • K(b);S_FLIGHT::QAB(B)+S(F)
      • Refutation
        • P(a);XR(G)
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::B(I)+S(F)
        • K(b);S_FLIGHT::QAB(B)+S(F)
        • P(a);SBLOCK::S(F)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(G);
    • Vars
      • K(b);S_FLIGHT::B(I)
      • K(b);S_FLIGHT::QAB(B)
      • K(b);S_FLIGHT::S(F)
      • K(b);S_FLIGHT::QAB(B)+S(F)
      • P(a);SBLOCK::S(F)
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).