MESON Chess Problem Database

Problem Display
PID: 85752 (r2b4/8/2Q5/kP3K2/8/P1N5/8/8 w - - 0 1)

Speckmann, Werner

Dagbladet, 1979

r2b4/8/2Q5/kP3K2/8/P1N5/8/8

#2

5 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Qxa6#
    • 1...Rb8
      • 2.Qa6#
    • 1...Rc8
      • 2.Qa6#
    • 1...Bh4
      • 2.Qc7#
    • 1...Bg5
      • 2.Qc7#
    • 1...Bf6
      • 2.Qc7#
    • 1...Bc7
      • 2.Qxc7#
    • 1...Be7
      • 2.Qc7#
  • Tries
    • 1.Qb7?
      • 1...Ra7
        • 2.Qxa7#
      • 1...Ra6
        • 2.Qxa6#
      • 1...Rb8
        • 2.Qa6#
        • 2.Qa7#
      • 1...Rc8
        • 2.Qa6#
        • 2.Qa7#
      • 1...Bh4
        • 2.Qc7#
      • 1...Bg5
        • 2.Qc7#
      • 1...Bf6
        • 2.Qc7#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Be7
        • 2.Qc7#
      • 1...Bb6!
    • 1.Qd6?
      • 1...Ra6
        • 2.Qxa6#
      • 1...Rb8
        • 2.Qa6#
      • 1...Rc8
        • 2.Qa6#
      • 1...Bh4
        • 2.Qc7#
      • 1...Bg5
        • 2.Qc7#
      • 1...Bb6
        • 2.Qb4#
      • 1...Bf6
        • 2.Qc7#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Be7
        • 2.Qc7#
      • 1...Ra7!
  • Keys
    • 1.Qc5!
      • 1...Ra7
        • 2.Qxa7#
      • 1...Ra6
        • 2.b6#
      • 1...Rb8
        • 2.Qa7#
      • 1...Rc8
        • 2.Qa7#
      • 1...Bh4
        • 2.Qc7#
      • 1...Bg5
        • 2.Qc7#
      • 1...Bb6
        • 2.Qb4#
      • 1...Bf6
        • 2.Qc7#
      • 1...Bc7
        • 2.Qxc7#
      • 1...Be7
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD::QAR1(E),XR(b)
    • R(b);N_GUARD::QAR1(E)
    • B(c);N_GUARD,SBLOCK::QAB(E)
    • B(c);N_GUARD::QAB(E)
    • B(c);N_GUARD::QAB(E),XB(c)
  • Tries
    • Try
      • Q(E);
      • Vars
        • R(b);N_GUARD::QAR2(E),XR(b)
        • R(b);N_GUARD::QAR1(E),XR(b)
        • B(c);N_GUARD,SBLOCK::QAB(E)
        • B(c);N_GUARD::QAB(E)
        • B(c);N_GUARD::QAB(E),XB(c)
      • Refutation
        • B(c);
    • Try
      • Q(E);
      • Vars
        • R(b);N_GUARD::QAR1(E),XR(b)
        • R(b);N_GUARD::QAR1(E)
        • B(c);N_GUARD,SBLOCK::QAB(E)
        • B(c);N_GUARD::QAB(E)
        • B(c);SBLOCK::QAB1(E)
        • B(c);N_GUARD::QAB(E),XB(c)
      • Refutation
        • R(b);
  • Actual
    • Q(E);
    • Vars
      • R(b);N_GUARD::QAR2(E),XR(b)
      • R(b);SBLOCK::QAR(E)+P(C)
      • R(b);N_GUARD::QAR2(E)
      • B(c);N_GUARD,SBLOCK::QAB(E)
      • B(c);N_GUARD::QAB(E)
      • B(c);SBLOCK::QAB1(E)
      • B(c);N_GUARD::QAB(E),XB(c)
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).