MESON Chess Problem Database

Problem Display
PID: 233251 (8/rpB4K/p6p/2k5/p3B3/qp2N3/4N2r/6Q1 w - - 0 1)

Muller, Dieter

Freie Presse, 1970

8/rpB4K/p6p/2k5/p3B3/qp2N3/4N2r/6Q1

#2

6 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qc1+?
      • 1...Kb4
        • 2.Qc4#
      • 1...Kb5
        • 2.Qc4#
      • 1...Qxc1!
    • 1.Qg5+?
      • 1...Kb4
        • 2.Ba5#
        • 2.Bd6#
        • 2.Qa5#
      • 1...hxg5+!
    • 1.Qg8?
      • threat
        • 2.Qc4#
      • 1...Kb4
        • 2.Qc4#
      • 1...Kb5
        • 2.Qc4#
      • 1...Qb4
        • 2.Qd5#
      • 1...b5
        • 2.Qf8#
      • 1...Qc1!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qb6#
      • 1...Kb4
        • 2.Qb6#
      • 1...Kb5
        • 2.Qb6#
      • 1...Qb4
        • 2.Qf5#
      • 1...b5
        • 2.Qd6#
      • 1...b6
        • 2.Qxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR1(A)
        • K(e);P-FLIGHT::QAB1(A)
      • Refutation
        • Q(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(g);CHECK,XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(e);S_FLIGHT::QAR1(A)
        • K(e);P-FLIGHT::QAB1(A)
        • Q(b);SBLOCK::QAR1(A)
        • P(i);P_PINB(E),SBLOCK::QAB(A)
      • Refutation
        • Q(b);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(e);S_FLIGHT::QAR2(A)
      • K(e);P-FLIGHT::QAR1(A)
      • Q(b);SBLOCK::QAR(A)
      • P(i);P_PINB(E),SBLOCK::QAB1(A)
      • P(i);P_PINB(E)::QAB1(A),XP(i)
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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).