MESON Chess Problem Database

Problem Display
PID: 123901 (8/7N/6p1/4K3/6kn/4R3/8/7Q w - - 0 1)

Glisic, Dejan I

PZR Bilten, 2002

8/7N/6p1/4K3/6kn/4R3/8/7Q

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sg2
      • 2.Qh3#
    • 1...Sf5
      • 2.Qh3#
    • 1...g5
      • 2.Sf6#
  • Tries
    • 1.Re4+?
      • 1...Kh5
        • 2.Rxh4#
        • 2.Qxh4#
      • 1...Kg3!
    • 1.Qg2+?
      • 1...Kh5
        • 2.Qg5#
      • 1...Sxg2!
    • 1.Qg1+?
      • 1...Kh5
        • 2.Qg5#
      • 1...Sg2!
  • Keys
    • 1.Rh3!
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Kh5
        • 2.Rxh4#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sf5
        • 2.Qf3#
      • 1...g5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);::QAB1(A)
    • P(c);SBLOCK::S(D)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • R(B);
    • Vars
      • S(b);CHECK,N_GUARD::QAB1(A),XS(b)
      • K(a);P_SPINS(b),S_FLIGHT::R1(B),XS(b)
      • S(b);N_GUARD::QAR2(A),XS(b)
      • S(b);N_GUARD::QAB1(A)
      • P(c);SBLOCK::S(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).