MESON Chess Problem Database

Problem Display
PID: 223042 (8/1KN5/8/p3N3/1k5B/np3R2/8/6Q1 w - - 0 1)

Taverner, Thomas

3rd Prize, Nashville Daily American, 1886

8/1KN5/8/p3N3/1k5B/np3R2/8/6Q1

#2

6 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...a4
      • 2.Be1#
  • Tries
    • 1.Sc6+?
      • 1...Kc4
        • 2.Qd4#
      • 1...Ka4!
    • 1.Qb6+?
      • 1...Ka4
        • 2.Qxb3#
      • 1...Sb5!
    • 1.Qg4+?
      • 1...Kc5
        • 2.Be7#
      • 1...Sc4!
  • Keys
    • 1.Qa1!
      • 1...Ka4
        • 2.Rf4#
      • 1...Kc5
        • 2.Be7#
      • 1...Sc4
        • 2.Sd3#
      • 1...Sb1
        • 2.Be7#
      • 1...Sc2
        • 2.Be7#
      • 1...Sb5
        • 2.Sa6#
      • 1...b2
        • 2.Qxa3#
      • 1...a4
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::B(C)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAB1(A),XP(b)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::B(C)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • Q(A);
    • Vars
      • K(c);P-FLIGHT,P_SPINS(a)::R(B)
      • K(c);S_FLIGHT::B(C)
      • S(a);SBLOCK::S(D)
      • S(a);::B(C)
      • S(a);SBLOCK::S(F)
      • P(b);::QAB1(A),XS(a)
      • P(d);SBLOCK::QAB1(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).