MESON Chess Problem Database

Problem Display
PID: 135333 (8/7p/5P2/3KBBk1/8/8/8/7Q w - - 0 1)

Laib, Kurt Friedrich

Kieler Nachrichten, 1952

8/7p/5P2/3KBBk1/8/8/8/7Q

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Qh5#
  • Tries
    • 1.Bg4?
      • threat
        • 2.Qh5#
      • 1...Kg6
        • 2.Qh5#
      • 1...h5
        • 2.Qxh5#
      • 1...Kxg4!
    • 1.Qe4?
      • 1...Kh6
        • 2.Qh4#
      • 1...h6
        • 2.Qg4#
      • 1...h5
        • 2.Qf4#
      • 1...Kh5!
    • 1.Qd1?
      • 1...Kh4
        • 2.Qg4#
      • 1...Kxf5
        • 2.Qh5#
      • 1...Kh6
        • 2.Bf4#
      • 1...h6
        • 2.Qg4#
      • 1...h5!
    • 1.Qh2?
      • 1...Kxf5
        • 2.Qh5#
      • 1...h5
        • 2.Qf4#
      • 1...h6!
    • 1.Qh3?
      • 1...h6
        • 2.Qg4#
      • 1...h5!
    • 1.Qh4+?
      • 1...Kxf5
        • 2.Qh5#
      • 1...Kxh4!
    • 1.Qh6+?
      • 1...Kxf5
        • 2.Qh5#
      • 1...Kxh6!
  • Keys
    • 1.Qf3!
      • 1...Kh4
        • 2.Qg4#
      • 1...Kh6
        • 2.Bf4#
      • 1...h6
        • 2.Qg4#
      • 1...h5
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT,XB(D)::QAR2(A)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • P(b);::QAR1(A),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XB(D)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT,XB(D)::QAR2(A)
        • K(a);S_FLIGHT::B(C)
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT,XB(D)::QAR2(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Vars
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XB(D)::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT,XB(D)::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::B(C)
      • P(b);SBLOCK::QAR1(A)
      • P(b);SBLOCK::QAB1(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).