MESON Chess Problem Database

Problem Display
PID: 15969 (1B6/1p6/2p5/1pNk1pNr/2R3Qq/P3P1r1/2B5/K2n4 w - - 0 1)

Barnes, Barry Peter

2nd Prize, Cheltenham TT, 2000

1B6/1p6/2p5/1pNk1pNr/2R3Qq/P3P1r1/2B5/K2n4

#2

9 + 9

4199 Barnes about Chess Problems 2001
133 The Problemist Supplement 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg5
      • 2.Qd4#
    • 1...Qh1
      • 2.Qd4#
    • 1...Qh2
      • 2.Qd4#
    • 1...Qh3
      • 2.Qd4#
    • 1...bxc4
      • 2.Qxf5#
    • 1...f4
      • 2.Qe6#
  • Tries
    • 1.Be4+?
      • 1...fxe4
        • 2.Qe6#
      • 1...Kxc4!
    • 1.Qxd1+?
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Kxc4!
    • 1.e4+?
      • 1...fxe4
        • 2.Qe6#
      • 1...Kxc4!
  • Keys
    • 1.Sge4!
      • threat
        • 2.Rd4#
      • 1...Qf6+
        • 2.Sxf6#
      • 1...Kxc4
        • 2.Bb3#
      • 1...Rxe3
        • 2.Qg8#
      • 1...Sxe3
        • 2.Sc3#
      • 1...bxc4
        • 2.Qxd1#
      • 1...fxe4
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD,XS(H)::QAR1(F)
    • Q(c);N_GUARD::QAR1(F)
    • P(d);SBLOCK,XR(E)::QAR2(F),XP(f)
    • P(f);OGATE::QAB1(F)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • P(f);OGATE,XB(B)::QAB1(F)
      • Refutation
        • K(e);S_FLIGHT,XR(E)
    • Try
      • Q(F);CHECK,XS(a)
      • Vars
        • Q(c);CHECK,N_GUARD,P_SPINQ(c)::QAR1(F),XQ(c)
      • Refutation
        • K(e);S_FLIGHT,XR(E)
    • Try
      • P(D);CHECK
      • Vars
        • P(f);OGATE,XP(D)::QAB1(F)
      • Refutation
        • K(e);S_FLIGHT,XR(E)
  • Actual
    • S(H);
    • Threat
      • R1(E)
    • Vars
      • Q(c);CHECK,N_GUARD::S(H),XQ(c)
      • K(e);OGATEB,S_FLIGHT,XR(E)::B(B)
      • R(b);N_GUARD,XP(D)::QAB(F)
      • S(a);N_GUARD,XP(D)::S(H)
      • P(d);SBLOCK,XR(E)::QAR(F),XS(a)
      • P(f);OGATE,XS(H)::QAB1(F)
HTML5 logo

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).