MESON Chess Problem Database

Problem Display
PID: 165515 (8/5p2/3B1k1K/1Q1P1p2/6p1/8/8/b7 w - - 0 1)

Andersson, Gunnar

Tidskrift for Schack, 1929

8/5p2/3B1k1K/1Q1P1p2/6p1/8/8/b7

#2

4 + 5

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qxb2#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Be7#
        • 2.Qe7#
      • 1...Be5
        • 2.Qxe5#
      • 1...f4!
    • 1.Qa5?
      • threat
        • 2.Qd8#
        • 2.Qxa1#
      • 1...Bb2
        • 2.Qd8#
      • 1...Bc3
        • 2.Qxc3#
        • 2.Qd8#
      • 1...Bd4
        • 2.Qd8#
      • 1...Be5
        • 2.Qd8#
      • 1...f4!
  • Keys
    • 1.Qb4!
      • 1...f4
        • 2.Qxf4#
      • 1...Bb2
        • 2.Qxb2#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Be5
        • 2.Be7#
      • 1...g3
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB(A),XB(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);N_GUARD::QAB1(A),XB(a)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Vars
      • P(c);OGATEB::QAR2(A),XP(c)
      • B(a);N_GUARD::QAB(A),XB(a)
      • B(a);SBLOCK::B(C)
      • P(b);OGATE::QAB(A)
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).