MESON Chess Problem Database

Problem Display
PID: 10655 (3R4/2pP2n1/pp2k1p1/4N1Qp/1PK5/3p2n1/B2P3B/5brr w - - 0 1)

Mansfield, Comins

Stella Polaris, 1966

3R4/2pP2n1/pp2k1p1/4N1Qp/1PK5/3p2n1/B2P3B/5brr

#2

9 + 12

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Se8
      • 2.dxe8Q#
      • 2.dxe8R#
    • 1...b5+
      • 2.Kc5#
  • Tries
    • 1.Re8+?
      • 1...Kd6
        • 2.Qe7#
        • 2.d8Q#
        • 2.d8R#
      • 1...Sxe8!
    • 1.Qxg6+?
      • 1...Ke7
        • 2.Sc6#
      • 1...Kxe5!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qxg6#
      • 1...b5+
        • 2.Kc5#
      • 1...Kd6
        • 2.Qd5#
      • 1...Kf7
        • 2.Qe7#
      • 1...Se2
        • 2.Kxd3#
      • 1...Se4
        • 2.Kd4#
      • 1...S3f5
        • 2.Kc3#
      • 1...Se8
        • 2.dxe8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(l);OGATE::PXS(l)=Q
    • P(h);CHECK::B(A)+K(E)
  • Tries
    • Try
      • R(I);CHECK
      • Refutation
        • S(l);XR(I)
    • Try
      • Q(G);CHECK,XP(j)
      • Vars
        • K(i);P-FLIGHT::S(F)
      • Refutation
        • K(i);P-FLIGHT,P_SPINS(e),XS(F)
  • Actual
    • S(F);
    • Threat
      • QAR2(G),XP(j)
    • Vars
      • P(h);CHECK::B(A)+K(E)
      • K(i);P-FLIGHT,P_SPINS(e)::QAR1(G)
      • K(i);S_FLIGHT::QAR1(G)
      • S(e);::B(A)+K(E),XP(d)
      • S(e);::B(A)+K(E)
      • S(l);OGATE::PXS(l)=Q
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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).