MESON Chess Problem Database

Problem Display
PID: 46264 (7K/3p4/5Q2/8/1N6/p1pB4/1P2R3/k1b5 w - - 0 1)

Wester, Anders Emil

Arbejder-Skak, 0000

7K/3p4/5Q2/8/1N6/p1pB4/1P2R3/k1b5

#2

6 + 5

4885 Amatorproblem 1976

SOLUTION

  • SOUND
  • Sets
    • 1...axb2
      • 2.Qa6#
  • Tries
    • 1.Qf7?
      • threat
        • 2.Qa2#
      • 1...a2
        • 2.Qxa2#
      • 1...d5!
  • Keys
    • 1.Qxc3!
      • threat
        • 2.Qxc1#
        • 2.Qxa3#
      • 1...Bxb2
        • 2.Re1#
      • 1...axb2
        • 2.Qa3#
      • 1...Bd2
        • 2.Qxa3#
      • 1...Be3
        • 2.Qxa3#
        • 2.bxa3#
        • 2.b3#
      • 1...Bf4
        • 2.Qxa3#
        • 2.bxa3#
        • 2.b3#
      • 1...Bg5
        • 2.Qxa3#
        • 2.bxa3#
        • 2.b3#
      • 1...Bh6
        • 2.Qxa3#
        • 2.bxa3#
        • 2.b3#
      • 1...a2
        • 2.Qxc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB,XP(A)::QAR(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • P(c);::QAR1(E),XP(c)
      • Refutation
        • P(e);
  • Actual
    • Q(E);XP(d)
    • Threat
      • DUALS(2)
    • Vars
      • B(b);OGATEB,P_PINQ(E),P_SPINB(b),XP(A)::R(B)
      • P(c);P_SPINP(c),XP(A)::QAR2(E)
      • B(b);::QAR2(E),XP(c)
      • P(c);::QAR2(E),XB(b)
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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).