MESON Chess Problem Database

Problem Display
PID: 11187 (K7/2NpQNp1/pp3n2/r7/3k1p2/1Pp2pp1/n1P2P2/6Bb w - - 0 1)

Evans, TC

Chess, 1937

K7/2NpQNp1/pp3n2/r7/3k1p2/1Pp2pp1/n1P2P2/6Bb

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Qe5#
    • 1...Ra4
      • 2.Qe5#
    • 1...Re5
      • 2.Qxe5#
    • 1...Sc1
      • 2.Qb4#
    • 1...Sb4
      • 2.Qxb4#
    • 1...gxf2
      • 2.Bxf2#
    • 1...b5
      • 2.Qe5#
  • Tries
    • 1.Qxf6+?
      • 1...Ke4
        • 2.Sd6#
      • 1...Kc5
        • 2.Qd6#
      • 1...Re5
        • 2.Qxe5#
      • 1...gxf6!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qc4#
      • 1...fxe2+
        • 2.f3#
      • 1...Kc5
        • 2.Qc4#
      • 1...gxf2
        • 2.Bxf2#
      • 1...Ra4
        • 2.Qe5#
      • 1...Rc5
        • 2.Qd3#
      • 1...b5
        • 2.Qe5#
      • 1...d5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(h);N_GUARD::QAB1(F)
    • R(h);N_GUARD::QAB1(F),XR(h)
    • S(b);N_GUARD::QAR2(F)
    • S(b);N_GUARD::QAR2(F),XS(b)
    • P(e);OGATE,P_SPINP(e),XP(C)::B(A),XP(e)
    • P(j);S_CUTR(h)::QAB1(F)
  • Tries
    • Try
      • Q(F);CHECK,XS(k)
      • Vars
        • K(f);P-FLIGHT::S(G)
        • K(f);S_FLIGHT::QAB1(F)
        • R(h);N_GUARD,P_SPINR(h)::QAB1(F),XR(h)
      • Refutation
        • P(m);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • P(d);CHECK,OGATE,XQ(F)::B(A)+P(C)
      • K(f);S_FLIGHT::QAR1(F)
      • P(e);OGATE,P_SPINP(e),XP(C)::B(A),XP(e)
      • R(h);N_GUARD::QAB1(F)
      • R(h);SBLOCK::QAR1(F)
      • P(j);S_CUTR(h)::QAB1(F)
      • P(l);N_GUARD,SBLOCK::S(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).