MESON Chess Problem Database

Problem Display
PID: 37053 (2Q4N/r2q1pp1/1R6/pN3k1B/K4p1P/4nP1b/6p1/B7 w - - 0 1)

Levman, Semyon Semyonovich

Recomm., BCF 010. Ty., 1932-1933

2Q4N/r2q1pp1/1R6/pN3k1B/K4p1P/4nP1b/6p1/B7

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Sd6#
    • 1...Ra6
      • 2.Qxd7#
    • 1...Ra8
      • 2.Qxd7#
    • 1...Sd5
      • 2.Qc2#
    • 1...f6
      • 2.Bg6#
    • 1...g5
      • 2.Rf6#
    • 1...g6
      • 2.Rf6#
  • Tries
    • 1.Qc2+?
      • 1...Qd3
        • 2.Qxd3#
      • 1...Sxc2!
    • 1.Qc5+?
      • 1...Sd5
        • 2.Qc2#
      • 1...Qd5!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Se7#
      • 1...Qxc8
        • 2.Sd4#
      • 1...fxg6
        • 2.Bxg6#
      • 1...Qe6
        • 2.Sd6#
      • 1...Sd5
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(h);N_PINS(E)::S(E)
    • R(g);N_GUARD::QAB(H),XQ(h)
    • S(b);N_GUARD::QAB(H)
    • P(i);N_GUARD::B(F)
    • P(j);N_GUARD::R1(G)
  • Tries
    • Try
      • Q(H);CHECK,N_PINQ(h)
      • Vars
        • Q(h);N_GUARD,N_PINS(E),P_SPINQ(h)::QAB(H),XQ(h)
      • Refutation
        • S(b);XQ(H)
    • Try
      • Q(H);CHECK,N_PINQ(h)
      • Vars
        • S(b);N_GUARD,P_SPINS(b),S_CUTQ(h)::QAB(H)
      • Refutation
        • Q(h);N_PINS(E),P_SPINQ(h)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • Q(h);N_PINS(E),N_SPINQ(h),XQ(H)::S(E)
      • P(i);OGATE,XS(I)::B(F),XP(i)
      • Q(h);N_PINS(E)::S(E)
      • S(b);N_GUARD::QAB(H)
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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).