MESON Chess Problem Database

Problem Display
PID: 71767 (B4R2/4N1n1/1p3bPB/4k1n1/1QbNP3/K1P5/5R2/8 w - - 0 1)

Levman, Semyon Semyonovich

La Settimana Enigmistica, 1935

B4R2/4N1n1/1p3bPB/4k1n1/1QbNP3/K1P5/5R2/8

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Sdc6#
    • 1...Sxe4
      • 2.Bf4#
    • 1...S5e6
      • 2.Sf3#
    • 1...Sf7
      • 2.Bf4#
    • 1...Sh7
      • 2.Bf4#
    • 1...Sf5
      • 2.Rxf5#
    • 1...Sh5
      • 2.Rf5#
    • 1...S7e6
      • 2.Rf5#
    • 1...Se8
      • 2.Rf5#
  • Tries
    • 1.Qc5+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...bxc5!
  • Keys
    • 1.Re8!
      • threat
        • 2.Sec6#
      • 1...Bxe7
        • 2.Bxg7#
      • 1...Sxe4
        • 2.Bf4#
      • 1...Sxe8
        • 2.Rf5#
      • 1...Be6
        • 2.Sdc6#
      • 1...S5e6
        • 2.Sf3#
      • 1...S7e6
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(a);SBLOCK::S(E)
    • S(c);OGATE,XP(F)::B(H)
    • S(c);N_GUARD,SBLOCK::S(E)
    • S(c);OGATE::B(H)
    • S(f);N_GUARD::R1(A),XS(f)
    • S(f);N_GUARD::R1(A)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(D),XB(a)
      • Refutation
        • P(d);XQ(D)
  • Actual
    • R(K);
    • Threat
      • R(K)+S(I),DCHECK
    • Vars
      • B(e);OGATEB,P_PINQ(D),P_SPINB(e),XS(I)::B(H),XS(f)
      • S(c);OGATE,XP(F)::B(H)
      • S(f);N_GUARD,XR(K)::R1(A)
      • B(a);SBLOCK::S(E)
      • S(c);N_GUARD,SBLOCK::S(E)
      • S(f);N_GUARD::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).