MESON Chess Problem Database

Problem Display
PID: 108327 (5Qn1/1p6/1p6/1BBk1p1N/1b3P1K/2p5/8/1q1n4 w - - 0 1)

Gold, Zsigmund

Checkmate, 1901

5Qn1/1p6/1p6/1BBk1p1N/1b3P1K/2p5/8/1q1n4

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qxg8#
    • 1...Qa2
      • 2.Qxf5#
    • 1...Qe4
      • 2.Qd6#
    • 1...Qa1
      • 2.Qxf5#
    • 1...Qc1
      • 2.Qxf5#
    • 1...Qb2
      • 2.Qxf5#
    • 1...Qb3
      • 2.Qxf5#
    • 1...c2
      • 2.Qxf5#
  • Tries
    • 1.Sf6+?
      • 1...Ke6
        • 2.Bc4#
        • 2.Bd7#
      • 1...Sxf6!
    • 1.Qe7?
      • threat
        • 2.Qe5#
      • 1...Qe4
        • 2.Qd6#
      • 1...Sxe7!
    • 1.Qf7+?
      • 1...Ke4
        • 2.Qxb7#
      • 1...Kxc5!
    • 1.Qxg8+?
      • 1...Ke4
        • 2.Qg2#
      • 1...Kxc5!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qxb7#
      • 1...Kxc5
        • 2.Qe5#
      • 1...Ke6
        • 2.Qxg8#
      • 1...Qe4
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • K(e);S_FLIGHT::QAB(F),XS(i)
    • Q(a);N_GUARD::QAR2(F),XP(f)
    • Q(a);P_PINP(A),SBLOCK::QAR1(F)
    • P(c);S_CUTQ(a)::QAR2(F),XP(f)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • S(i);XS(E)
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • Q(a);P_PINP(A),SBLOCK::QAR1(F)
      • Refutation
        • S(i);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB(F),XP(h)
      • Refutation
        • K(e);P-FLIGHT,XB(D)
    • Try
      • Q(F);CHECK,XS(i)
      • Vars
        • K(e);S_FLIGHT::QAB(F)
      • Refutation
        • K(e);P-FLIGHT,XB(D)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • K(e);S_FLIGHT::QAB(F),XP(h)
      • K(e);P-FLIGHT,XB(D)::QAR2(F)
      • K(e);S_FLIGHT::QAB(F),XS(i)
      • Q(a);P_PINP(A),SBLOCK::QAR1(F)
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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).