MESON Chess Problem Database

Problem Display
PID: 270624 (3nQKN1/6p1/6N1/3P1k1n/6pP/3p4/2b5/b2B4 w - - 0 1)

Barnes, Barry Peter

The Problemist, 2023

3nQKN1/6p1/6N1/3P1k1n/6pP/3p4/2b5/b2B4

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qe6#
    • 1...Se6+
      • 2.Qxe6#
    • 1...Sb7
      • 2.Qe6#
    • 1...Sf7
      • 2.Qe6#
    • 1...d2
      • 2.Bxc2#
  • Tries
    • 1.Qe3?
      • threat
        • 2.S6e7#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Kxg6
        • 2.Qe4#
      • 1...Sc6
        • 2.Qe6#
      • 1...Bf6!
    • 1.Qe5+?
      • 1...Kxg6
        • 2.Qe4#
      • 1...Bxe5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxg4#
      • 1...Se6+
        • 2.Qxe6#
      • 1...Kxg6
        • 2.Qe4#
      • 1...Bxd1
        • 2.Qxd3#
      • 1...dxe2
        • 2.Bxc2#
      • 1...Sf4
        • 2.S6e7#
      • 1...Sf6
        • 2.S8e7#
      • 1...g3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • S(h);N_GUARD::QAB1(E)
    • S(h);CHECK,N_GUARD::QAB1(E),XS(h)
    • P(c);OGATEB::B(A),XB(b)
  • Tries
    • Try
      • Q(E);
      • Threat
        • S(D)
      • Vars
        • S(h);CHECK,N_GUARD::QAB1(E),XS(h)
        • K(e);N_GUARD,S_FLIGHT,XS(D)::QAB(E)
        • S(h);N_GUARD::QAB1(E)
      • Refutation
        • B(a);
    • Try
      • Q(E);CHECK
      • Vars
        • K(e);N_GUARD,S_FLIGHT,XS(D)::QAB(E)
      • Refutation
        • B(a);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAB1(E),XP(d)
    • Vars
      • S(h);CHECK,N_GUARD::QAB1(E),XS(h)
      • K(e);N_GUARD,S_FLIGHT,XS(D)::QAB(E)
      • B(b);N_GUARD,XB(A)::QAB(E),XP(c)
      • P(c);OGATEB,XQ(E)::B(A),XB(b)
      • S(f);SBLOCK::S(D)
      • S(f);SBLOCK::S(G)
      • P(d);::QAB1(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).