MESON Chess Problem Database

Problem Display
PID: 71140 (8/4np1p/6n1/1N4R1/1p2kPQ1/1K2pr2/1Np3B1/2Bb3q w - - 0 1)

Stewart, John

Stubbs, Arthur Goodwin

Chess, 1951

8/4np1p/6n1/1N4R1/1p2kPQ1/1K2pr2/1Np3B1/2Bb3q

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sh4
      • 2.Re5#
    • 1...Se5
      • 2.Rxe5#
    • 1...Sf8
      • 2.Re5#
    • 1...Sh8
      • 2.Re5#
    • 1...Sd5
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sc6
      • 2.Qf5#
    • 1...Sc8
      • 2.Qf5#
    • 1...Sg8
      • 2.Qf5#
    • 1...e2+
      • 2.Qxf3#
  • Tries
    • 1.Qe6+?
      • 1...Kxf4
        • 2.Rg4#
        • 2.Qg4#
      • 1...Se5
        • 2.Qxe5#
      • 1...fxe6!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qd4#
      • 1...e2+
        • 2.Qd3#
      • 1...Kxf4
        • 2.Qg4#
      • 1...Sd5
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sc6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • S(h);N_GUARD::R1(H)
    • S(h);N_GUARD::R1(H),XS(h)
    • S(i);N_GUARD::QAB1(F)
    • S(i);N_GUARD::QAB1(F),XS(i)
    • P(d);CHECK,S_CUTB(a)::QAB1(F),XR(e)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAR1(F),XS(h)
      • Refutation
        • P(j);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • P(d);CHECK::QAB1(F)
      • K(g);N_SPINR(e),OGATEB,P-FLIGHT,P_SPINP(d),XP(E)::QAR1(F)
      • S(i);N_GUARD::QAB1(F)
      • S(i);N_GUARD::QAB1(F),XS(i)
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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).