MESON Chess Problem Database

Problem Display
PID: 186200 (8/NN1p4/3P4/3P4/1p1kB1p1/1P1P2Pn/PK3p1Q/2B5 w - - 0 1)

Howard, David M

2nd Prize, Problem Observer, 2017

8/NN1p4/3P4/3P4/1p1kB1p1/1P1P2Pn/PK3p1Q/2B5

#2

12 + 6

136 Problem Observer 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Qh8#
    • 1...Sf4
      • 2.Qh8#
    • 1...Sg5
      • 2.Qh8#
  • Tries
    • 1.Ka1?
      • 1...Ke5
        • 2.Bb2#
      • 1...f1Q
        • 2.Qb2#
      • 1...f1S
        • 2.Qb2#
      • 1...f1B
        • 2.Qb2#
      • 1...f1R
        • 2.Qb2#
      • 1...Sg1
        • 2.Qh8#
      • 1...Sf4
        • 2.Qh8#
      • 1...Sg5
        • 2.Qh8#
      • 1...Kc3!
  • Keys
    • 1.Kb1!
      • 1...Kc3
        • 2.Sb5#
      • 1...Ke5
        • 2.Bb2#
      • 1...f1Q
        • 2.Qb2#
      • 1...f1S
        • 2.Qb2#
      • 1...f1B
        • 2.Qb2#
      • 1...f1R
        • 2.Qb2#
      • 1...Sg1
        • 2.Qh8#
      • 1...Sf4
        • 2.Qh8#
      • 1...Sg5
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE::QAB(D)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(d);S_FLIGHT::B(A)
        • P(a);OGATE,P_PINB(A)::QAB(D)
        • P(a);OGATE::QAB(D)
        • S(b);OGATE::QAB(D)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • K(C);P-FLIGHT
    • Vars
      • K(d);S_FLIGHT::S(K)
      • K(d);S_FLIGHT::B(A)
      • P(a);OGATE,P_PINB(A)::QAB(D)
      • P(a);OGATE::QAB(D)
      • S(b);OGATE::QAB(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).