MESON Chess Problem Database

Problem Display
PID: 180222 (7Q/8/8/8/5K1p/5R2/4N1bp/5N1k w - - 0 1)

Lider, Valentin Viktorovich

Hlas l'udu, 1973

7Q/8/8/8/5K1p/5R2/4N1bp/5N1k

#2

5 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...h3
      • 2.Sfg3#
  • Tries
    • 1.Seg3+?
      • 1...Kg1
        • 2.Qd4#
      • 1...hxg3!
    • 1.Rf2?
      • 1...Bf3
        • 2.Rxh2#
      • 1...Bh3
        • 2.Rxh2#
      • 1...Be4
        • 2.Rxh2#
      • 1...Bd5
        • 2.Rxh2#
      • 1...Bc6
        • 2.Rxh2#
      • 1...Bb7
        • 2.Rxh2#
      • 1...Ba8
        • 2.Rxh2#
        • 2.Qxa8#
      • 1...h3
        • 2.Sfg3#
      • 1...Bxf1!
    • 1.Qa1?
      • threat
        • 2.Sfg3#
      • 1...Bxf1
        • 2.Qxf1#
      • 1...Bxf3
        • 2.Se3#
      • 1...Bh3!
  • Keys
    • 1.Qa8!
      • 1...Bxf1
        • 2.Rxf1#
      • 1...Bxf3
        • 2.Qxf3#
      • 1...Bh3
        • 2.Rxh3#
      • 1...h3
        • 2.Sfg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD::S(A)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB(E)
      • Refutation
        • P(d);P_SPINP(c),XS(B)
    • Try
      • R(C);
      • Vars
        • B(b);OGATE::R1(C),XP(c)
        • P(d);N_GUARD::S(A)
      • Refutation
        • B(b);XS(A)
    • Try
      • Q(E);
      • Threat
        • QAR(E)+S(A),DCHECK
      • Vars
        • B(b);OGATE,P_SPINB(b),XS(A)::QAR2(E),XB(b)
        • B(b);N_GUARD,XR(C)::QAR(E)+S(A)
      • Refutation
        • B(b);
  • Actual
    • Q(E);
    • Vars
      • B(b);OGATE,XS(A)::QAB(E)+R(C),DCHECK,XB(b)
      • B(b);OGATE,P_SPINB(b),XR(C)::QAB(E),XB(b)
      • B(b);OGATEB::QAB(E)+R(C),XB(b)
      • P(d);N_GUARD::S(A)
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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).