MESON Chess Problem Database

Problem Display
PID: 10444 (nn6/rP6/1k2P1p1/p5p1/Pb1N2P1/4N3/6Q1/1RRK1BB1 w - - 0 1)

Mansfield, Comins

2nd Prize, Schakend Nederland, 1964

nn6/rP6/1k2P1p1/p5p1/Pb1N2P1/4N3/6Q1/1RRK1BB1

#2

12 + 8

3747 FIDE Album (1962-1964) 1968
5862 An ABC of Chess Problems 1970
4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sd7
      • 2.Qc6#
  • Tries
    • 1.Sdf5?
      • 1...Rxb7
        • 2.Sd5#
      • 1...gxf5
        • 2.Sxf5#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sc7
        • 2.Sc2#
      • 1...Sa6
        • 2.Qc6#
      • 1...Sd7
        • 2.Qc6#
      • 1...Ra6!
    • 1.Rc6+?
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Kxb7!
  • Keys
    • 1.Sef5!
      • 1...Rxb7
        • 2.Sf3#
      • 1...gxf5
        • 2.Sxf5#
      • 1...Ra6
        • 2.Se2#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sc7
        • 2.Sc2#
      • 1...Sa6
        • 2.Qc6#
      • 1...Sd7
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(h);N_GUARD::QAR1(F)
    • S(h);N_GUARD::QAR1(F),XS(h)
  • Tries
    • Try
      • S(I);
      • Vars
        • R(f);SBLOCK,XP(L)::B(E)+S(G),DCHECK
        • P(e);XS(I)::B(E)+S(G),XP(e)
        • S(h);N_GUARD::QAR1(F),XS(h)
        • S(g);SBLOCK::B(E)+S(G)
        • S(h);N_GUARD::QAR1(F)
      • Refutation
        • R(f);
    • Try
      • R(B);CHECK
      • Vars
        • S(h);OGATE,XR(B)::QAR1(F),XS(h)
      • Refutation
        • K(d);P-FLIGHT,XP(L)
  • Actual
    • S(G);
    • Vars
      • R(f);SBLOCK,XP(L)::B(E)+S(I)
      • P(e);XS(G)::B(E)+S(I),XP(e)
      • R(f);SBLOCK::B(E)+S(I)
      • S(h);N_GUARD::QAR1(F),XS(h)
      • S(g);SBLOCK::B(E)+S(I)
      • S(h);N_GUARD::QAR1(F)
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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).