MESON Chess Problem Database

Problem Display
PID: 224504 (k7/8/1K1B4/2pb1p2/1P1P4/p2Bq2Q/6n1/8 w - - 0 1)

Cunningham, AW

Toledo Daily Blade, 1887

k7/8/1K1B4/2pb1p2/1P1P4/p2Bq2Q/6n1/8

#2

6 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qh8#
    • 1...f4
      • 2.Qc8#
  • Tries
    • 1.Qh8+?
      • 1...Qe8
        • 2.Qxe8#
      • 1...Bg8!
  • Keys
    • 1.Be4!
      • threat
        • 2.Bxd5#
        • 2.Qh8#
      • 1...Qxd4
        • 2.Qxa3#
      • 1...Qxh3
        • 2.Bxd5#
      • 1...Qxe4
        • 2.Qxa3#
      • 1...Bxe4
        • 2.Qh8#
      • 1...fxe4
        • 2.Qc8#
      • 1...Qg5
        • 2.Bxd5#
        • 2.Qxa3#
      • 1...Qh6
        • 2.Bxd5#
        • 2.Qxa3#
      • 1...Qb3
        • 2.Qh8#
      • 1...Qf3
        • 2.Qh8#
      • 1...Qg3
        • 2.Bxd5#
      • 1...Bc6
        • 2.Bxc6#
        • 2.Qh8#
      • 1...Bb7
        • 2.Bxb7#
        • 2.Qh8#
      • 1...Sf4
        • 2.Qh8#
      • 1...Sh4
        • 2.Bxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • B(e);N_GUARD,S_CUTQ(c)::QAB1(B)
    • P(f);OGATE::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAR(B),XQ(c)
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • B(A);P_PINB(e)
    • Threat
      • DUALS(2)
    • Vars
      • Q(c);OGATE,XP(D)::QAR(B),XP(b)
      • Q(c);XQ(B)::B(A),XB(e)
      • Q(c);N_SPINB(e),OGATE,XB(A)::QAR(B),XP(b)
      • B(e);N_SPINB(e),XB(A)::QAB1(B)
      • P(f);N_SPINB(e),OGATE,XB(A)::QAR2(B)
      • Q(c);P_PINP(C)::QAB1(B)
      • Q(c);::QAB1(B)
      • Q(c);::B(A),XB(e)
      • S(a);::QAB1(B)
      • S(a);::B(A),XB(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).