MESON Chess Problem Database

Problem Display
PID: 177769 (8/4Rp2/5b2/1K1k2n1/2N5/3BP3/8/4R3 w - - 0 1)

Gavriliv, Evgeni M

Sahs (Latvia), 1989

8/4Rp2/5b2/1K1k2n1/2N5/3BP3/8/4R3

#2

6 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Rxe5#
    • 1...Sf3
      • 2.Be4#
    • 1...Sh3
      • 2.Be4#
    • 1...Se4
      • 2.Bxe4#
    • 1...Se6
      • 2.Rd7#
    • 1...Sh7
      • 2.Be4#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Be4#
      • 1...Bxe7
        • 2.Bf5#
      • 1...Be5
        • 2.Rxe5#
      • 1...Se4
        • 2.Bxe4#
      • 1...Se6
        • 2.Rd7#
      • 1...Bd4!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Rd7#
      • 1...Bxe7
        • 2.Rd1#
      • 1...Be5
        • 2.Rxe5#
      • 1...Se4
        • 2.Bxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(c);N_GUARD::R1(F),XB(c)
    • S(b);N_GUARD::B(B)
    • S(b);N_GUARD::B(B),XS(b)
    • S(b);SBLOCK::R(F)
  • Tries
    • Try
      • R(A);
      • Threat
        • R(A)+B(B),DCHECK
      • Vars
        • B(c);N_GUARD,XR(F)::R(A)+B(B)
        • B(c);N_GUARD::R1(F),XB(c)
        • S(b);::R(A)+B(B),DCHECK,XS(b)
        • S(b);SBLOCK::R(F)
      • Refutation
        • B(c);
  • Actual
    • B(B);
    • Threat
      • R(F)
    • Vars
      • B(c);N_GUARD,XR(F)::R(A)
      • B(c);N_GUARD::R1(F),XB(c)
      • S(b);N_GUARD::B(B),XS(b)
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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).