MESON Chess Problem Database

Problem Display
PID: 189847 (6kr/6pN/8/3R4/7N/8/K7/1Q4b1 w - - 0 1)

Gold, Samuel

Magyar Sakkvilag, 1912

6kr/6pN/8/3R4/7N/8/K7/1Q4b1

#2

5 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Qg6#
    • 1...g6
      • 2.Qxg6#
  • Tries
    • 1.Qb8+?
      • 1...Kxh7
        • 2.Rh5#
      • 1...Kf7!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Rh5#
      • 1...Kf7
        • 2.Re5#
      • 1...Kxh7
        • 2.Rh5#
      • 1...Rxh7
        • 2.Rd8#
      • 1...g5
        • 2.Rd7#
      • 1...g6
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::QAR2(A)
    • P(b);OGATEB::QAR2(A),XP(b)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(E)::R(D)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(D)
    • Vars
      • K(c);S_FLIGHT::QAB(A)+R(D)
      • K(c);S_FLIGHT,XS(E)::R(D)
      • R(d);SBLOCK,XS(E)::QAB(A)+R(D),DCHECK
      • P(b);::QAB(A)+R(D)
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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).