MESON Chess Problem Database

Problem Display
PID: 189936 (N4Q2/3p2n1/Kpk5/8/2B2b2/1P6/8/8 w - - 0 1)

Shinkman, William Anthony

Pittsburgh Gazette-Times, 1912

N4Q2/3p2n1/Kpk5/8/2B2b2/1P6/8/8

#2

5 + 5

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Bb5#
    • 1...d6
      • 2.Qc8#
  • Tries
    • 1.Qc8+?
      • 1...Bc7
        • 2.Qxc7#
      • 1...Kd6!
    • 1.Qd8?
      • threat
        • 2.Qxb6#
      • 1...Kc5
        • 2.Qxb6#
      • 1...Be3
        • 2.Qc7#
      • 1...Bc7
        • 2.Qxc7#
      • 1...b5
        • 2.Qb6#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Qc7#
        • 2.Qc8#
      • 1...Kd6!
  • Keys
    • 1.b4!
      • threat
        • 2.b5#
      • 1...d5
        • 2.Bb5#
      • 1...d6
        • 2.Qc8#
      • 1...Bd6
        • 2.Qf3#
      • 1...b5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::B(B)
    • P(d);SBLOCK,S_CUTB(a)::QAR2(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(E),XB(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(b)
      • Vars
        • K(c);P-FLIGHT::QAB1(E),XP(b)
        • B(a);N_GUARD::QAR1(E)
        • B(a);N_GUARD::QAR1(E),XB(a)
        • P(b);::QAR1(E)
        • P(d);OGATE::QAB1(E),XP(d)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(d)
  • Actual
    • P(A);
    • Threat
      • P(A)
    • Vars
      • P(d);SBLOCK::B(B)
      • P(d);SBLOCK,S_CUTB(a)::QAR2(E)
      • B(a);OGATE,SBLOCK::QAB(E)
      • P(b);N_GUARD::QAR1(E)
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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).