MESON Chess Problem Database

Problem Display
PID: 204520 (5B2/2p2p2/rqN4K/1p1k4/2nN4/1Q6/2R5/3R2n1 w - - 0 1)

Levman, Semyon Semyonovich

64 Shakhmatnoe obozrenie, 1925

5B2/2p2p2/rqN4K/1p1k4/2nN4/1Q6/2R5/3R2n1

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sh3
      • 2.Qf3#
  • Keys
    • 1.Re2!
      • threat
        • 2.Re5#
      • 1...Qxc6+
        • 2.Se6#
      • 1...Qxd4
        • 2.Qxb5#
      • 1...Sxe2
        • 2.Qf3#
      • 1...Sf3
        • 2.Qxf3#
      • 1...f6
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB(C)
    • S(a);N_GUARD::QAB(C),XS(a)
  • Actual
    • R(B);
    • Threat
      • R1(B)
    • Vars
      • Q(f);CHECK,N_GUARD,SBLOCK,XS(E)::R(A)+S(D)
      • Q(f);N_GUARD,P_SPINQ(f),XS(D)::QAR2(C),XP(c)
      • S(a);N_GUARD,XR(B)::QAB(C)
      • S(a);N_GUARD::QAB(C),XS(a)
      • P(h);N_PINS(E)::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).