MESON Chess Problem Database

Problem Display
PID: 164066 (K1B5/8/8/3RpR2/2P1k2p/1n5n/8/4NN2 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Probleemblad, 1978

K1B5/8/8/3RpR2/2P1k2p/1n5n/8/4NN2

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Rdxe5#
    • 1...Sf4
      • 2.Rfxe5#
  • Tries
    • 1.Sd3?
      • 1...Sd4
        • 2.Sc5#
      • 1...Sa1
        • 2.Sc5#
      • 1...Sc1
        • 2.Sc5#
      • 1...Sd2
        • 2.Sc5#
      • 1...Sa5
        • 2.Sc5#
      • 1...Sc5
        • 2.Sxc5#
      • 1...Sg1
        • 2.Sf2#
      • 1...Sf2
        • 2.Sxf2#
      • 1...Sg5
        • 2.Sf2#
      • 1...Sf4!
    • 1.Sf3?
      • 1...Sf4
        • 2.Sg5#
      • 1...Sa1
        • 2.S3d2#
      • 1...Sc1
        • 2.S3d2#
      • 1...Sd2
        • 2.S3xd2#
      • 1...Sa5
        • 2.S3d2#
      • 1...Sc5
        • 2.S3d2#
      • 1...Sg1
        • 2.Sg5#
      • 1...Sf2
        • 2.Sg5#
      • 1...Sg5
        • 2.Sxg5#
      • 1...Sd4!
    • 1.Sg3+?
      • 1...Ke3
        • 2.Sc2#
        • 2.Sg2#
        • 2.Rd3#
        • 2.Rf3#
      • 1...hxg3!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Bf5#
      • 1...Sd4
        • 2.Sd2#
      • 1...Sf4
        • 2.Re3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::R1(D),XP(e)
    • S(b);SBLOCK::R1(E),XP(e)
  • Tries
    • Try
      • S(A);
      • Vars
        • S(a);N_GUARD::S(A)
        • S(a);N_GUARD::S(A),XS(a)
        • S(b);N_GUARD::S(A)
        • S(b);N_GUARD::S(A),XS(b)
      • Refutation
        • S(b);
    • Try
      • S(A);
      • Vars
        • S(b);N_GUARD::S(A)
        • S(a);N_GUARD::S(A)
        • S(a);N_GUARD::S(A),XS(a)
        • S(b);N_GUARD::S(A),XS(b)
      • Refutation
        • S(a);
    • Try
      • S(B);CHECK
      • Refutation
        • P(d);XS(B)
  • Actual
    • R(E);
    • Threat
      • B(G)
    • Vars
      • S(a);N_GUARD::S(B)
      • S(b);SBLOCK::R1(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).