MESON Chess Problem Database

Problem Display
PID: 77911 (4Q2K/7p/BR6/5np1/N2k4/4Nr2/2n1r1R1/b5B1 w - - 0 1)

Zalkind, Lazar Borissovich

1st HM., 64 Shakhmatnoe obozrenie, 1927

4Q2K/7p/BR6/5np1/N2k4/4Nr2/2n1r1R1/b5B1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Re1
      • 2.Rd2#
    • 1...Rd2
      • 2.Rxd2#
    • 1...Rexe3
      • 2.Rd2#
    • 1...Rh3
      • 2.Rg4#
    • 1...Se1
      • 2.Rb4#
    • 1...Sb4
      • 2.Rxb4#
    • 1...Sxe3
      • 2.Rd6#
    • 1...Sg3
      • 2.Rd6#
    • 1...Sh4
      • 2.Rd6#
    • 1...Sd6
      • 2.Rxd6#
    • 1...Sh6
      • 2.Rd6#
    • 1...Sg7
      • 2.Rd6#
  • Keys
    • 1.Qe6!
      • threat
        • 2.Sxc2#
        • 2.Sxf5#
        • 2.Qd5#
      • 1...Rexe3
        • 2.Rd2#
      • 1...Rfxe3
        • 2.Rg4#
      • 1...Scxe3
        • 2.Rb4#
      • 1...Sfxe3
        • 2.Rd6#
      • 1...Ref2
        • 2.Sxc2#
      • 1...Rff2
        • 2.Sxf5#
      • 1...Se1
        • 2.Sc2#
        • 2.Sxf5#
        • 2.Rb4#
        • 2.Qd5#
      • 1...Sa3
        • 2.Sc2#
        • 2.Sxf5#
        • 2.Qd5#
      • 1...Sb4
        • 2.Sc2#
        • 2.Sxf5#
        • 2.Rxb4#
      • 1...Sg3
        • 2.Sxc2#
        • 2.Sf5#
        • 2.Rd6#
        • 2.Qd5#
      • 1...Sh4
        • 2.Sxc2#
        • 2.Sf5#
        • 2.Rd6#
        • 2.Qd5#
      • 1...Sd6
        • 2.Sxc2#
        • 2.Sf5#
        • 2.Rxd6#
        • 2.Qd5#
      • 1...Sh6
        • 2.Sxc2#
        • 2.Sf5#
        • 2.Rd6#
        • 2.Qd5#
      • 1...Se7
        • 2.Sxc2#
        • 2.Sf5#
      • 1...Sg7
        • 2.Sxc2#
        • 2.Sf5#
        • 2.Rd6#
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 10
  • Sets
    • R(c);OGATE::R(B)
    • R(c);OGATE::R(B),XR(c)
    • R(c);OGATE,P_SPINR(c),XS(C)::R(B)
    • R(d);N_GUARD::R(B)
    • S(b);N_GUARD::R(F)
    • S(b);N_GUARD::R(F),XS(b)
    • S(f);N_GUARD,P_SPINS(f),XS(C)::R(F)
    • S(f);N_GUARD::R(F)
    • S(f);N_GUARD::R(F),XS(f)
  • Actual
    • Q(G);
    • Threat
      • DUALS(3)
    • Vars
      • R(c);OGATE,P_SPINR(c),XS(C)::R(B)
      • R(d);N_GUARD,P_SPINR(d),XS(C)::R(B)
      • S(b);N_GUARD,P_SPINS(b),XS(C)::R(F)
      • S(f);N_GUARD,P_SPINS(f),XS(C)::R(F)
      • R(c);::S(C),XS(b)
      • R(d);::S(C),XS(f)
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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).