MESON Chess Problem Database

Problem Display
PID: 22106 (1Q6/8/KN6/8/1N1Rp3/pkn3rR/q1n3p1/B2Bb3 w - - 0 1)

Mansfield, Comins

1st Prize, L'Alfiere di Re, 1924

1Q6/8/KN6/8/1N1Rp3/pkn3rR/q1n3p1/B2Bb3

#2

8 + 9

4797 A Genius of the Two-mover 1936
3202 Complete Mansfield/I 1996
5308 La genialita compositiva di Giorgio Guidelli 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rg8
      • 2.Qxg8#
    • 1...Sb1
      • 2.Qg8#
    • 1...Sxd1
      • 2.Qg8#
    • 1...Se2
      • 2.Qg8#
    • 1...Sa4
      • 2.Qg8#
    • 1...Sb5
      • 2.Qg8#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Sc5#
      • 1...Rg6+
        • 2.Sc6#
      • 1...Ka4
        • 2.Sxa2#
        • 2.Sc5#
      • 1...Rg5
        • 2.Sd5#
      • 1...Sa4
        • 2.Qg8#
      • 1...Qxa1!
    • 1.Qg8+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Rxg8!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sc5#
      • 1...Rg6+
        • 2.Sc6#
      • 1...Kxa4
        • 2.Sxa2#
      • 1...Qxa1
        • 2.Bxc2#
      • 1...Sxa4
        • 2.Qg8#
      • 1...Rg5
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(h);N_GUARD,S_CUTS(g)::QAB(H),XR(h)
    • S(g);N_GUARD,P_SPINR(h)::QAB(H)
    • S(g);N_GUARD,N_SPINS(c),P_SPINR(h),XB(B)::QAB(H)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • R(h);CHECK,S_CUTS(g)::QAR(H)+S(D)
        • R(h);S_CUTS(g)::QAR(H)+S(D)
        • S(g);N_GUARD,P_SPINR(h),SBLOCK::QAB(H)
      • Refutation
        • Q(b);XB(A)
    • Try
      • Q(H);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINR(h)::QAB(H),XS(g)
      • Refutation
        • R(h);XQ(H)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • R(h);CHECK,S_CUTS(g)::QAR(H)+S(D)
      • K(f);S_FLIGHT,XS(G)::R(E)+S(D),XQ(b)
      • Q(b);N_GUARD,XB(A)::B(B),XS(c)
      • S(g);N_GUARD,P_SPINR(h),SBLOCK,XS(G)::QAB(H)
      • R(h);S_CUTS(g)::QAR(H)+S(D)
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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).