MESON Chess Problem Database

Problem Display
PID: 10337 (8/2R1pB2/N3r1b1/2Pk4/1rpn4/1pBn4/5N1Q/5K2 w - - 0 1)

Mansfield, Comins

Skakbladet, 1963

8/2R1pB2/N3r1b1/2Pk4/1rpn4/1pBn4/5N1Q/5K2

#2

8 + 9

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Sxb4#
    • 1...Se1
      • 2.Sxb4#
    • 1...Sb2
      • 2.Sxb4#
    • 1...Sxc5
      • 2.Sxb4#
      • 2.Rxc5#
    • 1...Se5
      • 2.Sxb4#
    • 1...Sf5
      • 2.Qh1#
      • 2.Qg2#
    • 1...Sc6
      • 2.Rd7#
  • Tries
    • 1.Qe5+?
      • 1...Sxe5
        • 2.Sxb4#
      • 1...Kxe5!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qxd4#
      • 1...Sf3
        • 2.Qd8#
      • 1...Se5
        • 2.Sxb4#
      • 1...Sc2
        • 2.Qd8#
      • 1...Se2
        • 2.Qd8#
      • 1...Sb5
        • 2.Qa8#
      • 1...Sf5
        • 2.Qh1#
      • 1...Sc6
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • S(b);N_GUARD::S(F),XR(c)
    • S(e);SBLOCK::R(G)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);SBLOCK,XQ(C)::S(F),XR(c)
      • Refutation
        • K(f);N_SPINR(g),P-FLIGHT,P_SPINS(e),XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XS(e)
    • Vars
      • S(e);::QAR(C)
      • S(b);N_GUARD::S(F),XR(c)
      • S(e);N_GUARD,S_CUTR(c)::QAB(C)
      • S(e);N_GUARD,S_CUTB(h)::QAB(C)
      • S(e);SBLOCK::R(G)
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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).