MESON Chess Problem Database

Problem Display
PID: 229111 (Q1n1bNB1/rr1P3K/pPk3p1/3Rn3/4N2b/4Bpq1/8/8 w - - 0 1)

Levman, Semyon Semyonovich

1st HM., Shakhmaty, 1926

Q1n1bNB1/rr1P3K/pPk3p1/3Rn3/4N2b/4Bpq1/8/8

#2

9 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be7
      • 2.dxc8Q#
      • 2.dxc8R#
    • 1...Sxb6
      • 2.Rc5#
    • 1...Se7
      • 2.d8S#
  • Keys
    • 1.Ra5!
      • threat
        • 2.Bd5#
      • 1...Sxb6
        • 2.Rc5#
      • 1...Bf7
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Sf7
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Se7
        • 2.d8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(c);N_PINP(E)::PXS(j)=Q
    • S(j);SBLOCK,XP(D)::R1(C)
    • S(j);N_PINP(E)::P=S
  • Actual
    • R(C);
    • Threat
      • B(I)
    • Vars
      • S(j);SBLOCK,XP(D)::R1(C)
      • B(k);N_PINP(E)::PXS(j)=Q
      • S(d);N_PINP(E)::PXB(k)=Q
      • S(j);N_PINP(E)::P=S
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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).