MESON Chess Problem Database

Problem Display
PID: 4858 (2B5/3Q1R2/1p5q/4k3/3p4/4p1r1/5n2/Kn6 w - - 0 1)

Loyd, Sam

New York Mail and Express, 1892

2B5/3Q1R2/1p5q/4k3/3p4/4p1r1/5n2/Kn6

#2

4 + 8

5206 Sam Loyd and His Chess Problems 1913
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qf5#
    • 1...Qf4
      • 2.Qe6#
    • 1...Qg5
      • 2.Qe6#
    • 1...Qg7
      • 2.Qe6#
    • 1...Qf8
      • 2.Qe6#
    • 1...Qh1
      • 2.Qe6#
    • 1...Qh2
      • 2.Qe6#
    • 1...Qh4
      • 2.Qe6#
    • 1...Qh5
      • 2.Qe6#
    • 1...Qd6
      • 2.Qf5#
    • 1...Qe6
      • 2.Qxe6#
    • 1...Qh7
      • 2.Qe6#
    • 1...Qh8
      • 2.Qe6#
    • 1...Se4
      • 2.Rf5#
  • Tries
    • 1.Qb5+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Kd6!
    • 1.Qe7+?
      • 1...Qe6
        • 2.Qxe6#
      • 1...Kd5!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Qxd4#
      • 1...Kxf4
        • 2.Qf5#
      • 1...Qxf4
        • 2.Qe6#
      • 1...Qd6
        • 2.Qf5#
      • 1...Se4
        • 2.Rf5#
      • 1...d3
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • K(f);P-FLIGHT::QAB1(B)
    • Q(h);N_GUARD::QAR1(B)
    • Q(h);SBLOCK::QAR1(B)
    • Q(h);N_GUARD::QAR1(B),XQ(h)
    • S(b);SBLOCK::R1(C)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);OGATE,P-FLIGHT::QAB1(B)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::QAR1(B),XQ(h)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • R(C);
    • Threat
      • QAB1(B),XP(e)
    • Vars
      • K(f);S_FLIGHT,XR(C)::QAR1(B)
      • Q(h);N_GUARD,SBLOCK,XR(C)::QAR1(B)
      • Q(h);SBLOCK::QAR1(B)
      • S(b);SBLOCK::R1(C)
      • P(e);::QAB1(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).