MESON Chess Problem Database

Problem Display
PID: 181892 (4n2b/4p2B/4pkNQ/8/8/3K4/8/8 w - - 0 1)

Taylor, Jesse Paul

San Francisco Chronicle, 1905

4n2b/4p2B/4pkNQ/8/8/3K4/8/8

#2

4 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qf4#
    • 1...Kf7
      • 2.Sxh8#
      • 2.Qf8#
    • 1...Bg7
      • 2.Qf4#
    • 1...e5
      • 2.Sxh8#
  • Tries
    • 1.Ke4?
      • threat
        • 2.Se5#
        • 2.Sxh8#
      • 1...Kf7
        • 2.Sxh8#
        • 2.Qf8#
      • 1...e5
        • 2.Sxe5#
        • 2.Sxh8#
      • 1...Bg7
        • 2.Qf4#
      • 1...Sd6+!
    • 1.Qh4+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kf7
        • 2.Qxe7#
      • 1...Kg7!
  • Keys
    • 1.Kd4!
      • threat
        • 2.Se5#
        • 2.Sxh8#
      • 1...Kf5+
        • 2.Se5#
      • 1...Kf7+
        • 2.Sxh8#
      • 1...e5+
        • 2.Sxe5#
      • 1...Bg7
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(C)
    • B(e);SBLOCK::QAR2(C)
    • P(a);SBLOCK::QAR(C)+S(B),XB(e)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(e);SBLOCK::QAR2(C)
      • Refutation
        • S(d);CHECK
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
        • K(b);OGATE,P-FLIGHT::QAR1(C),XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • K(A);P-FLIGHT
    • Threat
      • DUALS(2)
    • Vars
      • K(b);CHECK,P-FLIGHT::B(D)+S(B)
      • K(b);CHECK,P-FLIGHT::S(B),XB(e)
      • P(a);CHECK::QAR(C)+S(B),XP(a)
      • B(e);SBLOCK::QAR2(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).