MESON Chess Problem Database

Problem Display
PID: 214582 (5k2/2N5/1P3P2/2b4n/2B4B/8/2K5/5Q2 w - - 0 1)

Shinkman, William Anthony

Newark Sunday Call, 1878

5k2/2N5/1P3P2/2b4n/2B4B/8/2K5/5Q2

#2

7 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf6
      • 2.Qxf6#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qa8#
        • 2.Qg8#
      • 1...Be7
        • 2.Qg8#
        • 2.fxe7#
      • 1...Sg3
        • 2.Qa8#
      • 1...Sg7
        • 2.Qxg7#
        • 2.fxg7#
      • 1...Sxf6!
    • 1.Qf5?
      • threat
        • 2.Qc8#
        • 2.Qxc5#
      • 1...Bxb6
        • 2.Qc8#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Bg1
        • 2.Qc8#
      • 1...Bf2
        • 2.Qc8#
      • 1...Ba3
        • 2.Qc8#
      • 1...Be3
        • 2.Qc8#
      • 1...Bb4
        • 2.Qc8#
      • 1...Bd4
        • 2.Qc8#
      • 1...Bd6
        • 2.Qc8#
      • 1...Sg7
        • 2.Qxc5#
      • 1...Be7!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qa8#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Ba3
        • 2.Qxa3#
      • 1...Be7
        • 2.fxe7#
      • 1...Sg7
        • 2.fxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE,P_SPINS(b),XP(F)::QAR2(A),XS(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR(A)
      • Refutation
        • S(b);XP(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XP(E)::QAR(A)
        • S(b);OGATE,P_SPINS(b),XP(F)::QAR2(A),XS(b)
        • B(a);::QAR(A)
        • S(b);::QAB(A),XB(a)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • S(b);OGATE,XP(F)::QAR2(A),XS(b)
      • B(a);OGATEB::QAB(A),XB(a)
      • B(a);OGATE::P(F),XB(a)
      • S(b);OGATE::P(F),XS(b)
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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).