MESON Chess Problem Database

Problem Display
PID: 67893 (2N3n1/2B2pb1/2B1k2p/8/2K2Q2/8/8/8 w - - 0 1)

Barron, Philip

Chess, 1949

2N3n1/2B2pb1/2B1k2p/8/2K2Q2/8/8/8

#2

5 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Qxe5#
    • 1...Bf6
      • 2.Qg4#
    • 1...Bf8
      • 2.Qe5#
    • 1...Sf6
      • 2.Qe5#
  • Tries
    • 1.Qe4+?
      • 1...Be5
        • 2.Qxe5#
      • 1...Kf6!
  • Keys
    • 1.Be8!
      • threat
        • 2.Qxf7#
      • 1...f5
        • 2.Qd6#
      • 1...Bf6
        • 2.Qg4#
      • 1...Sf6
        • 2.Qe5#
      • 1...f6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(d);N_GUARD::QAR1(B),XB(d)
    • B(d);SBLOCK,S_CUTP(c)::QAB(B)
    • B(d);N_GUARD::QAR1(B)
    • S(e);S_CUTB(d)::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::QAR1(B),XB(d)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAB1(B),XP(c)
    • Vars
      • P(c);SBLOCK::QAR1(B)
      • B(d);SBLOCK,S_CUTP(c)::QAB(B)
      • S(e);S_CUTB(d)::QAR1(B)
      • P(c);SBLOCK,S_CUTB(d)::QAR2(B)
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).