MESON Chess Problem Database

Problem Display
PID: 17125 (8/1rb2B1K/2N5/4p3/kP6/2Q5/8/8 w - - 0 1)

Havel, Miroslav

Narodni listy, 1899

8/1rb2B1K/2N5/4p3/kP6/2Q5/8/8

#2

5 + 4

6024 Bohemian Garnets 1923
4312 Ceske Granaty 1975

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4
      • 2.Qxb4#
    • 1...Rb5
      • 2.Qa1#
      • 2.Qb3#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Qb3#
      • 1...Rxb4
        • 2.Qa1#
      • 1...exd4!
    • 1.Qc2+?
      • 1...Ka3
        • 2.Qb3#
        • 2.Qa2#
      • 1...Kb5!
    • 1.b5?
      • threat
        • 2.Qb4#
        • 2.Qb3#
      • 1...Rxb5
        • 2.Qa1#
      • 1...Ba5
        • 2.Qxa5#
        • 2.Qb3#
      • 1...Bd6
        • 2.Qa5#
        • 2.Qb3#
      • 1...Kxb5!
  • Keys
    • 1.Sa7!
      • threat
        • 2.Qb3#
      • 1...Rxb4
        • 2.Qa1#
      • 1...Rxa7
        • 2.Be8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE,XP(B)::QAR1(A),XR(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(A)
      • Vars
        • R(c);SBLOCK,XP(B)::QAR(A)
      • Refutation
        • P(b);XS(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);SBLOCK,XP(B)::QAR(A)
      • Refutation
        • K(a);S_FLIGHT,XP(B)
  • Actual
    • S(C);
    • Threat
      • QAB1(A)
    • Vars
      • R(c);SBLOCK,XP(B)::QAR(A)
      • R(c);N_GUARD,XS(C)::B(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).