MESON Chess Problem Database

Problem Display
PID: 162098 (7n/KpR1Q2q/p5r1/1pN2B2/Pp1b4/1Pk4r/5p2/1R3N2 w - - 0 1)

Levman, Semyon Semyonovich

Zadachi i Etyudi, 1928

7n/KpR1Q2q/p5r1/1pN2B2/Pp1b4/1Pk4r/5p2/1R3N2

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc5+
      • 2.Qxc5#
    • 1...Be5
      • 2.Qxe5#
    • 1...Bf6
      • 2.Se6#
    • 1...Bg7
      • 2.Se6#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Rc1#
        • 2.Qb2#
        • 2.Qc2#
        • 2.Qd2#
      • 1...Be3
        • 2.Qd3#
        • 2.Qb2#
      • 1...Be5
        • 2.Qb2#
        • 2.Qd2#
        • 2.Qxe5#
      • 1...Bf6
        • 2.Qb2#
        • 2.Qd2#
      • 1...Bg7
        • 2.Se6#
        • 2.Qb2#
        • 2.Qd2#
      • 1...Qh6
        • 2.Qb2#
        • 2.Qc2#
      • 1...Rd3
        • 2.Rc1#
        • 2.Qxd3#
        • 2.Qb2#
      • 1...Bxc5+!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qc2#
      • 1...Bxc5+
        • 2.Rxc5#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Be3
        • 2.Qd3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bf6
        • 2.Sd7#
      • 1...Bg7
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(e);CHECK,OGATE,P_SPINB(e),XS(E)::QAR2(I),XB(e)
    • B(e);N_PINS(E),OGATEB::QAB(I),XB(e)
    • B(e);N_PINS(E)::R(H)+S(E)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(4)
      • Refutation
        • B(e);CHECK,P_SPINB(e),XS(E)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • B(e);CHECK,OGATE,P_SPINB(e),XS(E)::R(H),XB(e)
      • R(c);N_GUARD::QAR1(I),XR(c)
      • B(e);S_CUTR(c)::QAR1(I)
      • B(e);N_PINS(E),OGATEB::QAB(I),XB(e)
      • B(e);N_PINS(E)::R(H)+S(E)
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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).