MESON Chess Problem Database

Problem Display
PID: 119872 (1b6/6Q1/8/8/3R3P/3pk3/2pNp1n1/2K1n3 w - - 0 1)

Aleksandrov, I

Shakhmaty, 1871

1b6/6Q1/8/8/3R3P/3pk3/2pNp1n1/2K1n3

#2

5 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Qg1#
    • 1...Sxh4
      • 2.Qg1#
  • Keys
    • 1.Rf4!
      • threat
        • 2.Qd4#
      • 1...Kxf4
        • 2.Qg5#
      • 1...Bxf4
        • 2.Qa7#
      • 1...Sxf4
        • 2.Qg1#
      • 1...Sf3
        • 2.Rxf3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Ba7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(d);OGATE::QAB(E)
    • S(d);OGATE,XP(D)::QAB(E)
  • Actual
    • R(C);
    • Threat
      • QAB1(E)
    • Vars
      • K(f);OGATEB,S_FLIGHT,XR(C)::QAB1(E)
      • B(g);N_GUARD,SBLOCK,XR(C)::QAB(E)
      • S(d);OGATE,SBLOCK,XR(C)::QAB(E)
      • S(a);N_GUARD::R1(C),XS(a)
      • B(g);N_GUARD::QAR2(E),XB(g)
      • B(g);N_GUARD::QAR2(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).