MESON Chess Problem Database

Problem Display
PID: 18956 (B4b2/4Q1N1/3p1pq1/3P3b/1P1kP1NR/1Kn5/2P2Pn1/8 w - - 0 1)

Livshits, Eduard Yakovlevich

1st Prize, Suomen Shakki, 1959

B4b2/4Q1N1/3p1pq1/3P3b/1P1kP1NR/1Kn5/2P2Pn1/8

#2

11 + 8

3749 FIDE Album (1959-1961) 1966
3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qa7#
    • 1...Qf5
      • 2.Sxf5#
    • 1...Qf7
      • 2.Sf5#
    • 1...Qe8
      • 2.Sf5#
    • 1...Qh6
      • 2.Sf5#
    • 1...Se3
      • 2.fxe3#
    • 1...Sxe4
      • 2.Se6#
  • Tries
    • 1.Qxf6+?
      • 1...Kxe4
        • 2.f3#
      • 1...Qxf6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sc6#
      • 1...Qxe4
        • 2.Sf5#
      • 1...Sxe4
        • 2.c3#
      • 1...dxe5
        • 2.Se6#
      • 1...fxe5
        • 2.Qa7#
      • 1...Qe8
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(g);SBLOCK,XP(E)::QAB(I)
    • Q(g);N_GUARD::S(J),XQ(g)
    • Q(g);N_GUARD,P_PINP(H)::S(J)
    • Q(g);N_GUARD::S(J)
    • S(a);OGATE::P(B),XS(a)
    • S(b);SBLOCK,XP(E)::S(J)
  • Tries
    • Try
      • Q(I);CHECK,XP(f)
      • Vars
        • K(c);P-FLIGHT,XP(E)::P(B)
      • Refutation
        • Q(g);XQ(I)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • Q(g);N_GUARD,P_SPINQ(g),XP(E)::S(J)
      • S(b);OGATE,P_SPINS(b),XP(E)::P(A)
      • P(e);SBLOCK,XS(F)::S(J)
      • P(f);SBLOCK,XS(F)::QAB(I)
      • Q(g);N_GUARD::S(J)
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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).