MESON Chess Problem Database

Problem Display
PID: 30794 (B4R2/5npb/2r1p3/3r3N/N1P1k1P1/7p/3bPP1Q/B3n2K w - - 0 1)

Brown, Theodore Morris

Dubuque Chess Journal, 1875

B4R2/5npb/2r1p3/3r3N/N1P1k1P1/7p/3bPP1Q/B3n2K

#2

11 + 10

3391 Het Half Pin Thema 1947

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Sc5#
    • 1...Rd4
      • 2.Sc5#
    • 1...Rdc5
      • 2.Sxc5#
    • 1...Rdd6
      • 2.Sc5#
    • 1...Rd7
      • 2.Sc5#
    • 1...Rd8
      • 2.Sc5#
    • 1...Rcc5
      • 2.Sxc5#
    • 1...Ra6
      • 2.Sc5#
    • 1...Rb6
      • 2.Sc5#
    • 1...Rcd6
      • 2.Sc5#
    • 1...Bc3
      • 2.Qf4#
    • 1...Bb4
      • 2.Qf4#
    • 1...Bf4
      • 2.Qxf4#
    • 1...Ba5
      • 2.Qf4#
    • 1...Se5
      • 2.Sg3#
    • 1...Sg5
      • 2.Sg3#
    • 1...Sd6
      • 2.Sg3#
    • 1...Sh6
      • 2.Sg3#
    • 1...Sd8
      • 2.Sg3#
    • 1...Sh8
      • 2.Sg3#
    • 1...g5
      • 2.Sf6#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Sc3+?
      • 1...Bxc3
        • 2.Qf4#
      • 1...Kd4!
    • 1.Qe5+?
      • 1...Sxe5
        • 2.Sg3#
      • 1...Rxe5!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Sg3#
      • 1...Rxh5
        • 2.Qd4#
      • 1...Rdxd6
        • 2.Sc5#
      • 1...Rcxd6
        • 2.Sc5#
      • 1...Bc3
        • 2.Qf4#
      • 1...Rd3
        • 2.Sc5#
      • 1...Re5
        • 2.Qd4#
      • 1...Bf4
        • 2.Qxf4#
      • 1...e5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 17
  • Sets
    • R(e);N_GUARD,P_SPINR(f)::S(F)
    • R(e);N_GUARD,P_SPINR(f)::S(F),XR(e)
    • R(f);N_GUARD,P_SPINR(e)::S(F),XR(f)
    • R(f);N_GUARD,P_SPINR(e)::S(F)
    • B(b);N_GUARD::QAR1(E)
    • B(b);N_GUARD::QAR1(E),XB(b)
    • S(h);::S(I)
    • P(i);N_GUARD::S(I)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(b);XS(F)::QAR1(E)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • S(h);XQ(E)::S(I)
      • Refutation
        • R(e);P_SPINR(f),XQ(E)
  • Actual
    • Q(E);
    • Threat
      • S(I)
    • Vars
      • R(e);OGATE,P_SPINR(f),XS(I)::QAR1(E)
      • R(e);N_GUARD,P_SPINR(f),XQ(E)::S(F)
      • R(f);N_GUARD,P_SPINR(e),XQ(E)::S(F)
      • B(b);N_GUARD::QAR1(E)
      • R(e);N_GUARD,P_SPINR(f)::S(F)
      • R(e);OGATE,P_SPINR(f)::QAR1(E)
      • B(b);N_GUARD::QAR1(E),XB(b)
      • P(g);N_GUARD::QAB1(E),XR(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).