MESON Chess Problem Database

Problem Display
PID: 180230 (6B1/B1Q5/2PrppN1/1prk1n2/1p6/1Ppn1P2/2N5/K6R w - - 0 1)

Lider, Valentin Viktorovich

2nd HM., Problem 058. TT, 1975

6B1/B1Q5/2PrppN1/1prk1n2/1p6/1Ppn1P2/2N5/K6R

#2

10 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Sf4#
    • 1...Sd4
      • 2.Se3#
  • Tries
    • 1.Rd1?
      • 1...Rcxc6
        • 2.Sxb4#
      • 1...Rdxc6
        • 2.Sf4#
      • 1...Rd7
        • 2.Sf4#
      • 1...Rd8
        • 2.Sf4#
      • 1...Se3
        • 2.Rxd3#
      • 1...Sg3
        • 2.Rxd3#
      • 1...Sd4
        • 2.Se3#
      • 1...Sh4
        • 2.Rxd3#
      • 1...Sh6
        • 2.Rxd3#
      • 1...Se7
        • 2.Rxd3#
      • 1...Sg7
        • 2.Rxd3#
      • 1...Rc4!
  • Keys
    • 1.Rh5!
      • 1...Rcxc6
        • 2.Se3#
      • 1...Rdxc6
        • 2.Se7#
      • 1...Rc4
        • 2.Se3#
      • 1...Rd7
        • 2.Qxd7#
      • 1...Rd8
        • 2.Se7#
      • 1...Sc1
        • 2.Rxf5#
      • 1...Se1
        • 2.Rxf5#
      • 1...Sb2
        • 2.Rxf5#
      • 1...Sf2
        • 2.Rxf5#
      • 1...Sf4
        • 2.Rxf5#
      • 1...Se5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD,SBLOCK::S(G)
    • S(g);N_GUARD,SBLOCK::S(C)
  • Tries
    • Try
      • R(B);P_PINS(b)
      • Vars
        • R(e);XP(F)::S(C),XP(c)
        • R(h);XP(F)::S(G)
        • R(h);::S(G)
        • S(g);N_GUARD::R(B),XS(b)
        • S(g);N_GUARD,N_SPINS(b),SBLOCK::S(C)
      • Refutation
        • R(e);
  • Actual
    • R(B);P_PINS(g)
    • Vars
      • R(e);XP(F)::S(C)
      • R(h);XP(F)::S(G)
      • R(e);::S(C)
      • R(h);OGATEB::QAR2(I),XR(h)
      • R(h);::S(G)
      • S(b);N_GUARD::R(B),XS(g)
      • S(b);N_GUARD,N_SPINS(g),SBLOCK::S(G)
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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).