MESON Chess Problem Database

Problem Display
PID: 149551 (8/4K3/p2Q4/1k1p4/8/P2p4/8/8 w - - 0 1)

Dehler, Ernst Georg

Neubrandenburger Wochenschach, 1912

8/4K3/p2Q4/1k1p4/8/P2p4/8/8

#2

3 + 4

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qb4#
    • 1...Kc4
      • 2.Qb4#
    • 1...Ka5
      • 2.Qb4#
  • Tries
    • 1.Qc5+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Kxc5!
    • 1.Qb6+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc4
        • 2.Qb4#
      • 1...Kxb6!
  • Keys
    • 1.Kd7!
      • threat
        • 2.Qb4#
      • 1...Ka4
        • 2.Qb4#
      • 1...Kc4
        • 2.Qb4#
      • 1...Ka5
        • 2.Qb4#
      • 1...a5
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR1(B)
    • K(b);P-FLIGHT::QAB1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • QAR1(B)
    • Vars
      • K(b);S_FLIGHT::QAR1(B)
      • K(b);P-FLIGHT::QAB1(B)
      • P(d);SBLOCK::QAB1(B)
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).