MESON Chess Problem Database

Problem Display
PID: 85699 (8/p7/p1pk1K2/B2p4/6Q1/8/8/8 w - - 0 1)

Speckmann, Werner

Dortmunder General Anzeiger, 1929

8/p7/p1pk1K2/B2p4/6Q1/8/8/8

#2

3 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qb4#
    • 1...d4
      • 2.Qxd4#
    • 1...c5
      • 2.Qe6#
  • Tries
    • 1.Qe4?
      • threat
        • 2.Qe7#
      • 1...Kc5
        • 2.Qb4#
      • 1...Kd7
        • 2.Qe6#
      • 1...c5
        • 2.Qe6#
      • 1...d4
        • 2.Qxd4#
      • 1...dxe4!
    • 1.Qf4+?
      • 1...Kc5
        • 2.Qb4#
      • 1...Kd7!
  • Keys
    • 1.Kf7!
      • 1...Kc5
        • 2.Qb4#
      • 1...Ke5
        • 2.Bc7#
      • 1...d4
        • 2.Qxd4#
      • 1...c5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT::QAB1(A)
    • P(a);OGATEB::QAR2(A),XP(a)
    • P(c);SBLOCK::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(d);S_FLIGHT::QAB1(A)
        • K(d);P-FLIGHT::QAB1(A)
        • P(c);SBLOCK::QAR1(A)
        • P(a);OGATEB::QAR2(A),XP(a)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB1(A)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • K(C);P-FLIGHT
    • Vars
      • K(d);S_FLIGHT::QAB1(A)
      • K(d);S_FLIGHT::B(B)
      • P(a);OGATEB::QAR2(A),XP(a)
      • P(c);SBLOCK::QAR1(A)
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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).