MESON Chess Problem Database

Problem Display
PID: 203393 (3B4/1n6/b7/1RpK4/k7/8/4BN2/1Nb5 w - - 0 1)

Sergeev, Aleksandr

Shakhmaty, 1924

3B4/1n6/b7/1RpK4/k7/8/4BN2/1Nb5

#2

6 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Sc3#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Sdc3#
      • 1...Bb2
        • 2.Sxb2#
      • 1...Bd2
        • 2.Sb2#
      • 1...Bxb5!
  • Keys
    • 1.Sd3!
      • 1...Kxb5
        • 2.Sc3#
      • 1...Bxb5
        • 2.Bd1#
      • 1...Sxd8
        • 2.Sxc5#
      • 1...Bb2
        • 2.Sxb2#
      • 1...Bd2
        • 2.Sb2#
      • 1...Ba3
        • 2.Sc3#
      • 1...Be3
        • 2.Sb2#
      • 1...Bf4
        • 2.Sb2#
      • 1...Bg5
        • 2.Sb2#
      • 1...Bh6
        • 2.Sb2#
      • 1...Sa5
        • 2.Sxc5#
      • 1...Sd6
        • 2.Sxc5#
      • 1...c4
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK::S(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • B(a);N_GUARD::S(C),XB(a)
        • B(a);N_GUARD::S(C)
      • Refutation
        • B(d);XR(D)
  • Actual
    • S(C);
    • Vars
      • K(b);S_FLIGHT,XR(D)::S(A)
      • B(d);SBLOCK,XR(D)::B(B)
      • S(e);N_GUARD,XB(F)::S(C),XP(c)
      • B(a);N_GUARD::S(C),XB(a)
      • B(a);N_GUARD::S(C)
      • B(a);SBLOCK::S(A)
      • S(e);N_GUARD::S(C),XP(c)
      • P(c);N_GUARD::R1(D)
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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).