MESON Chess Problem Database

Problem Display
PID: 175280 (1Q3R2/1p3BB1/2b3pN/rn4rp/3pk3/4b1pP/2P1NpK1/5R2 w - - 0 1)

Coppens, JP

Brisbane Courier, 1923

1Q3R2/1p3BB1/2b3pN/rn4rp/3pk3/4b1pP/2P1NpK1/5R2

#2

10 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Qe5#
    • 1...Rc5
      • 2.Sxg3#
    • 1...Rd5
      • 2.Sxg3#
    • 1...Re5
      • 2.Qxe5#
    • 1...Rf5
      • 2.Sxg3#
    • 1...Bf4
      • 2.Qxf4#
  • Tries
    • 1.Bxg6+?
      • 1...Rf5
        • 2.Qe5#
      • 1...Rxg6
        • 2.Qe5#
      • 1...Kd5!
    • 1.Re8+?
      • 1...Re5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Bxe8!
    • 1.Qe8+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Bxe8!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qe5#
      • 1...Kxf5+
        • 2.Bd5#
      • 1...Rxf5
        • 2.Sxg3#
      • 1...Bf4
        • 2.Qxf4#
      • 1...Sa3
        • 2.Sd6#
      • 1...Sc3
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sa7
        • 2.Sd6#
      • 1...Sc7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • R(h);N_GUARD::QAR1(I)
    • R(h);N_GUARD::S(C),XP(c)
    • R(h);N_GUARD::QAR1(I),XR(h)
    • B(b);N_GUARD::QAR1(I),XB(b)
  • Tries
    • Try
      • B(G);CHECK,XP(k)
      • Vars
        • R(h);P_SPINR(h)::QAR1(I)
        • R(h);XB(G)::QAR1(I)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(J);CHECK
      • Refutation
        • B(j);XR(J)
    • Try
      • Q(I);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAR1(I),XR(h)
      • Refutation
        • B(j);XQ(I)
  • Actual
    • S(F);
    • Threat
      • QAR1(I)
    • Vars
      • K(e);CHECK,P_SPINP(a),S_FLIGHT,XS(F)::R(J)+B(G)
      • R(h);N_GUARD,XS(F)::S(C),XP(c)
      • B(b);N_GUARD::QAR1(I),XB(b)
      • S(g);N_GUARD::S(F)
      • S(g);N_GUARD::S(F),XS(g)
HTML5 logo

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).