MESON Chess Problem Database

Problem Display
PID: 162916 (8/n7/8/b7/kPQB4/8/K7/8 w - - 0 1)

Lincoln, Robert A

Die Schwalbe, 2016

8/n7/8/b7/kPQB4/8/K7/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Qb3#
  • Tries
    • 1.Qc2+?
      • 1...Kxb4
        • 2.Qb3#
      • 1...Kb5!
  • Keys
    • 1.Bc3!
      • threat
        • 2.bxa5#
      • 1...Bxb4
        • 2.Qxb4#
      • 1...Bb6
        • 2.b5#
      • 1...Bc7
        • 2.b5#
      • 1...Bd8
        • 2.b5#
      • 1...Sc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(c);SBLOCK::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(D);
    • Threat
      • QAR(C)+P(B),XB(b)
    • Vars
      • B(b);OGATE,P_SPINB(b),XP(B)::QAR1(C),XB(b)
      • B(b);N_GUARD::QAR(C)+P(B)
      • S(c);N_GUARD::QAB(C),XS(c)
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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).