MESON Chess Problem Database

Problem Display
PID: 180540 (1b4Rn/7p/7k/2qr4/3B2P1/5P1N/3p2KR/8 w - - 0 1)

Lider, Valentin Viktorovich

Thema Danicum, 1985

1b4Rn/7p/7k/2qr4/3B2P1/5P1N/3p2KR/8

#2

7 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sg5#
    • 1...Rd6
      • 2.Sg5#
    • 1...Be5
      • 2.Sf4#
    • 1...Ba7
      • 2.Sg5#
    • 1...Sg6
      • 2.Bg7#
  • Tries
    • 1.g5+?
      • 1...Kh5
        • 2.Sf4#
      • 1...Rxg5+!
  • Keys
    • 1.Be5!
      • threat
        • 2.Sg1#
        • 2.Sf2#
        • 2.Sf4#
        • 2.Sg5#
      • 1...Qg1+
        • 2.Sxg1#
      • 1...Qf2+
        • 2.Sxf2#
      • 1...Rxe5
        • 2.Sg5#
      • 1...Bxe5
        • 2.Sf4#
      • 1...Qe7
        • 2.Sg5#
      • 1...Sg6
        • 2.Bg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(c);S_CUTB(f)::R(B)+S(D)
    • B(f);S_CUTR(c)::R(B)+S(D)
    • B(f);N_GUARD,SBLOCK::R(B)+S(D)
    • S(g);SBLOCK::B(E)
  • Tries
    • Try
      • P(F);CHECK
      • Vars
        • K(d);P-FLIGHT::R(B)+S(D),DCHECK
      • Refutation
        • R(c);CHECK,XP(F)
  • Actual
    • B(E);
    • Threat
      • DUALS(4)
    • Vars
      • Q(b);CHECK::R(B)+S(D),XQ(b)
      • R(c);XB(E)::R(B)+S(D)
      • B(f);XB(E)::R(B)+S(D)
      • Q(b);::R(B)+S(D)
      • S(g);SBLOCK::B(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).