MESON Chess Problem Database

Problem Display
PID: 177935 (1n6/1N6/4p1K1/R2bkB1p/3p1p2/4b3/8/4Q3 w - - 0 1)

Leun, Evgeny

5th Comm., Sahs (Latvia), 1988

1n6/1N6/4p1K1/R2bkB1p/3p1p2/4b3/8/4Q3

#2

5 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qh4?
      • threat
        • 2.Qf6#
      • 1...exf5
        • 2.Qe7#
      • 1...f3
        • 2.Qe4#
      • 1...Sd7!
    • 1.Qb1?
      • threat
        • 2.Qe4#
      • 1...exf5
        • 2.Qxf5#
      • 1...d3!
    • 1.Qh1?
      • threat
        • 2.Qe4#
      • 1...exf5
        • 2.Qxd5#
      • 1...f3!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qd6#
      • 1...exf5
        • 2.Qe7#
      • 1...d3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);N_PINB(a),P_PINB(d)
      • Threat
        • QAB1(A)
      • Vars
        • P(g);OGATEB,XB(C)::QAR2(A)
        • P(c);OGATE::QAR1(A)
      • Refutation
        • S(h);
    • Try
      • Q(A);N_PINB(a),P_PINB(d)
      • Threat
        • QAR1(A)
      • Vars
        • P(g);OGATE,XB(C)::QAR1(A),XP(g)
      • Refutation
        • P(b);
    • Try
      • Q(A);N_PINB(a),P_PINB(d)
      • Threat
        • QAR1(A)
      • Vars
        • P(g);N_GUARD,XB(C)::QAR1(A),XB(d)
      • Refutation
        • P(c);
  • Actual
    • Q(A);N_PINB(a),P_PINB(d)
    • Threat
      • QAB1(A)
    • Vars
      • P(g);OGATEB,XB(C)::QAR2(A)
      • P(b);OGATE::QAR1(A)
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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).