MESON Chess Problem Database

Problem Display
PID: 224696 (1n5k/5n1P/7P/8/8/8/5K2/1B5Q w - - 0 1)

Tigner, WA

The Sunny South, 1888

1n5k/5n1P/7P/8/8/8/5K2/1B5Q

#2

5 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qe4?
      • threat
        • 2.Qe8#
      • 1...Sxh6
        • 2.Qd4#
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sd6
        • 2.Qd4#
        • 2.Qe5#
      • 1...Sd7!
    • 1.Qe1?
      • threat
        • 2.Qe8#
      • 1...Sxh6
        • 2.Qc3#
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sd6
        • 2.Qc3#
        • 2.Qe5#
      • 1...Sd7!
    • 1.Qh4?
      • threat
        • 2.Qf6#
      • 1...Sg5
        • 2.Qd4#
      • 1...Sd7!
  • Keys
    • 1.Qa8!
      • 1...Sxh6
        • 2.Qa1#
      • 1...Se5
        • 2.Qxb8#
      • 1...Sg5
        • 2.Qa1#
        • 2.Qxb8#
      • 1...Sd6
        • 2.Qa1#
      • 1...Sd8
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • S(a);N_GUARD::QAB(B),XS(a)
      • Refutation
        • S(b);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • S(a);N_GUARD::QAB(B),XS(a)
      • Refutation
        • S(b);
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • S(a);N_GUARD::QAB(B)
      • Refutation
        • S(b);
  • Actual
    • Q(B);P_PINS(b)
    • Vars
      • S(a);N_GUARD,XP(D)::QAB(B)
      • S(a);N_GUARD::QAR(B),XS(b)
      • S(a);N_GUARD::QAB(B)
      • S(a);N_GUARD,N_SPINS(b)::QAB(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).