MESON Chess Problem Database

Problem Display
PID: 274515 (n2rq3/2N1Q3/3p1p2/K4B1b/pPpk1N2/1p2R3/3p4/6n1 w - - 0 1)

Levman, Semyon Semyonovich

Die Schwalbe, 1933

n2rq3/2N1Q3/3p1p2/K4B1b/pPpk1N2/1p2R3/3p4/6n1

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5+
      • 2.Sxb5#
    • 1...Qg6
      • 2.Sb5#
      • 2.Qe4#
    • 1...Qd7
      • 2.Qe4#
    • 1...Qf7
      • 2.Sb5#
      • 2.Qe4#
    • 1...Qf8
      • 2.Sb5#
      • 2.Qe4#
    • 1...Qg8
      • 2.Sb5#
      • 2.Qe4#
    • 1...Qh8
      • 2.Sb5#
      • 2.Qe4#
    • 1...Rd7
      • 2.Sb5#
    • 1...Sf3
      • 2.Se2#
    • 1...c3
      • 2.Re4#
    • 1...d5
      • 2.Qc5#
  • Keys
    • 1.Re6!
      • threat
        • 2.Qxf6#
      • 1...Qb5+
        • 2.Sxb5#
      • 1...Kc3
        • 2.Qxf6#
      • 1...Qxe7
        • 2.Sb5#
      • 1...Qg6
        • 2.Sb5#
      • 1...Qf7
        • 2.Sb5#
      • 1...Qf8
        • 2.Sb5#
      • 1...Qh8
        • 2.Sb5#
      • 1...Sf3
        • 2.Se2#
      • 1...c3
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(l);CHECK,N_GUARD::S(F),XQ(l)
    • Q(l);N_GUARD::QAR1(G)
    • R(k);S_CUTQ(l)::S(F)
    • S(a);N_GUARD,S_CUTB(g)::S(C)
    • P(e);SBLOCK::R1(A)
    • P(h);OGATE::QAB1(G)
  • Actual
    • R(A);
    • Threat
      • QAB(G),XP(i)
    • Vars
      • Q(l);CHECK,N_GUARD::S(F),XQ(l)
      • K(f);S_FLIGHT::QAB(G),XP(i)
      • Q(l);N_GUARD,XQ(G)::S(F)
      • Q(l);N_GUARD::S(F)
      • S(a);N_GUARD,S_CUTB(g)::S(C)
      • P(e);SBLOCK::R1(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).