MESON Chess Problem Database

Problem Display
PID: 202630 (2K5/5p2/4N2N/4k1B1/4p3/8/Q7/1B6 w - - 0 1)

Keysor, William Ellis

Brisbane Courier, 1923

2K5/5p2/4N2N/4k1B1/4p3/8/Q7/1B6

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Sxf7#
    • 1...f5
      • 2.Sf7#
    • 1...f6
      • 2.Bf4#
  • Tries
    • 1.Kc7?
      • 1...e3
        • 2.Sg4#
        • 2.Sxf7#
      • 1...f5
        • 2.Sf7#
      • 1...f6
        • 2.Bf4#
      • 1...fxe6!
    • 1.Sf4?
      • threat
        • 2.Qd5#
      • 1...Kd6
        • 2.Qd5#
      • 1...Kd4!
    • 1.Sc7?
      • threat
        • 2.Qd5#
      • 1...Kd6
        • 2.Qd5#
      • 1...Kd4!
    • 1.Qh2+?
      • 1...Kxe6
        • 2.Ba2#
      • 1...Kd5!
  • Keys
    • 1.Qc4!
      • 1...Kd6
        • 2.Sxf7#
      • 1...fxe6
        • 2.Qc5#
      • 1...e3
        • 2.Sxf7#
      • 1...f5
        • 2.Sf7#
      • 1...f6
        • 2.Bf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(a);::S(E),XP(c)
    • P(c);SBLOCK::S(E)
    • P(c);SBLOCK::B(C)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • P(c);SBLOCK::S(E)
        • P(c);SBLOCK::B(C)
      • Refutation
        • P(c);XS(D)
    • Try
      • S(D);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(D)::B(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT::S(E),XP(c)
      • P(c);SBLOCK,XS(D)::QAR2(B)
      • P(a);::S(E),XP(c)
      • P(c);SBLOCK::S(E)
      • P(c);SBLOCK::B(C)
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).