MESON Chess Problem Database

Problem Display
PID: 6810 (R1NN3R/2k1p3/p1B1P3/p1n5/P7/K1p3r1/2Q4B/5n2 w - - 0 1)

Mansfield, Comins

6th Highly Comm., Brisbane Sports and Radio, 1933/I

R1NN3R/2k1p3/p1B1P3/p1n5/P7/K1p3r1/2Q4B/5n2

#2

10 + 8

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Bxg3#
    • 1...Se3
      • 2.Bxg3#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qf4#
      • 1...Sxe6
        • 2.Qb6#
        • 2.Qa7#
      • 1...Sd3
        • 2.Qb6#
        • 2.Qa7#
      • 1...Se4
        • 2.Qb6#
        • 2.Qa7#
      • 1...Sb7
        • 2.Qb6#
      • 1...Sd7
        • 2.Qa7#
      • 1...c2+!
  • Keys
    • 1.Qxc3!
      • 1...Sxh2
        • 2.Qxg3#
      • 1...Sxa4
        • 2.Bxa4#
      • 1...Sxe6
        • 2.Sxe6#
      • 1...Sd2
        • 2.Bxg3#
        • 2.Qxg3#
      • 1...Se3
        • 2.Bxg3#
        • 2.Qxa5#
        • 2.Qe5#
      • 1...Sb3
        • 2.Qe5#
      • 1...Sd3
        • 2.Qxa5#
      • 1...Se4
        • 2.Bxe4#
      • 1...Sb7
        • 2.Bxb7#
      • 1...Sd7
        • 2.Bxd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::B(B),XR(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • S(e);OGATE::QAB1(A)
        • S(e);OGATE::QAR2(A)
      • Refutation
        • P(b);CHECK
  • Actual
    • Q(A);P_SPINQ(A),XP(b)
    • Vars
      • S(a);N_GUARD,N_SPINR(c),XB(B)::QAB(A),XR(c)
      • S(e);OGATE,XP(D)::QAR(A)+B(E),XS(e)
      • S(e);XP(F)::S(I),XS(e)
      • S(e);N_PINQ(A)::QAB(A)
      • S(e);N_PINQ(A)::QAB(A),XP(d)
      • S(e);OGATEB::QAR(A)+B(E),XS(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).