MESON Chess Problem Database

Problem Display
PID: 100782 (1K4B1/1pP1k3/7r/5Qb1/3P4/8/8/8 w - - 0 1)

Dehler, Ernst Georg

Narodni Politika, 1912

1K4B1/1pP1k3/7r/5Qb1/3P4/8/8/8

#2

5 + 4

6490 yacpdb 2009
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ke8
      • 2.Qf7#
    • 1...Rd6
      • 2.Qf7#
  • Tries
    • 1.Qe6+?
      • 1...Kf8
        • 2.Qf7#
      • 1...Rxe6!
    • 1.Qd7+?
      • 1...Kf6
        • 2.Qf7#
      • 1...Kf8
        • 2.Qf7#
      • 1...Kxd7!
    • 1.Qf8+?
      • 1...Kd7
        • 2.c8Q#
      • 1...Kxf8!
    • 1.c8Q?
      • threat
        • 2.Qcd7#
        • 2.Qff8#
        • 2.Qcf8#
      • 1...Kd6
        • 2.Qfd7#
        • 2.Qcd7#
        • 2.Qfc5#
        • 2.Qe5#
        • 2.Qcc5#
        • 2.Qc7#
      • 1...Rd6
        • 2.Qf7#
        • 2.Qff8#
        • 2.Qcf8#
      • 1...Re6
        • 2.Qfxe6#
        • 2.Qff8#
      • 1...Rf6
        • 2.Qfd7#
      • 1...Bf6
        • 2.Qfe6#
        • 2.Qfd7#
        • 2.Qfc5#
      • 1...Bf4+!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qd8#
      • 1...Kf6
        • 2.Qf7#
      • 1...Ke8
        • 2.Qf7#
      • 1...Kf8
        • 2.Qf7#
      • 1...Rd6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);P-FLIGHT::QAB1(B)
    • R(b);SBLOCK::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR1(B)
      • Refutation
        • R(b);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(d);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);P-FLIGHT::P=Q
      • Refutation
        • K(d);S_FLIGHT,XQ(B)
    • Try
      • P(C);
      • Threat
        • DUALS(3)
      • Vars
        • R(b);SBLOCK::QAR1(B)
      • Refutation
        • B(a);CHECK
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(d);S_FLIGHT::QAR1(B)
      • K(d);P-FLIGHT::QAB1(B)
      • R(b);SBLOCK::QAR1(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).