MESON Chess Problem Database

Problem Display
PID: 117404 (4B3/6bq/2N2k1p/3P1P1r/8/6Q1/K4R2/8 w - - 0 1)

Livshits, Eduard Yakovlevich

Havel MT, 1960-1961

4B3/6bq/2N2k1p/3P1P1r/8/6Q1/K4R2/8

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Qg6#
    • 1...Qg6
      • 2.Qxg6#
    • 1...Qg8
      • 2.Qg6#
    • 1...Qh8
      • 2.Qg6#
    • 1...Rh4
      • 2.Qxh4#
    • 1...Rxf5
      • 2.Qh4#
    • 1...Rg5
      • 2.Qe5#
      • 2.Qd6#
      • 2.Qc3#
  • Tries
    • 1.Qh4+?
      • 1...Rg5
        • 2.Qd4#
      • 1...Rxh4!
  • Keys
    • 1.Rg2!
      • threat
        • 2.Qe5#
      • 1...Kxf5
        • 2.Qf3#
      • 1...Qxf5
        • 2.Qxg7#
      • 1...Rxf5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(e);N_GUARD,P_SPINQ(e),XP(E)::QAR1(C)
    • Q(e);N_GUARD::QAR1(C),XQ(e)
    • Q(e);N_GUARD,P_PINP(D)::QAR1(C)
    • Q(e);N_GUARD::QAR1(C)
    • R(a);N_GUARD::QAB(C),XR(a)
    • R(a);N_GUARD,P_SPINR(a),XP(E)::QAB(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • R(a);P_SPINR(a),SBLOCK::QAB(C)
      • Refutation
        • R(a);XQ(C)
  • Actual
    • R(B);
    • Threat
      • QAB1(C)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(E)::QAR2(C)
      • Q(e);N_GUARD,SBLOCK,XP(E)::QAB1(C),XB(d)
      • R(a);SBLOCK,XP(E)::QAR2(C)
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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).