MESON Chess Problem Database

Problem Display
PID: 6946 (B1K5/1N6/3Pp3/2Q1p2N/Rn1nk1P1/bb6/2r1PP2/8 w - - 0 1)

Eaton, Vincent Lanius

Chess, 1935

B1K5/1N6/3Pp3/2Q1p2N/Rn1nk1P1/bb6/2r1PP2/8

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5+
      • 2.Sxc5#
    • 1...Sb5
      • 2.f3#
    • 1...Sf5
      • 2.f3#
    • 1...Sc6
      • 2.f3#
  • Tries
    • 1.Qxc2+?
      • 1...Kd5
        • 2.Sf6#
        • 2.e4#
      • 1...Bxc2
        • 2.Sc5#
      • 1...Sbxc2
        • 2.Sc5#
      • 1...Sd3
        • 2.Sc5#
      • 1...Sdxc2!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Sc5#
      • 1...Kd5
        • 2.Sf6#
      • 1...Sd5
        • 2.f3#
      • 1...Sbc6
        • 2.Qf3#
      • 1...Sdc6
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(a);CHECK,XQ(E)::B(I)+S(H),DCHECK,XR(a)
    • S(e);N_GUARD,P_SPINS(d)::P(B)
    • S(e);N_GUARD,N_PINQ(E),P_SPINS(d)::P(B)
  • Tries
    • Try
      • Q(E);CHECK,N_SPINQ(E),XR(a)
      • Vars
        • B(c);XQ(E)::B(I)+S(H),DCHECK
        • S(d);P_SPINS(e),XQ(E)::B(I)+S(H),DCHECK
        • S(d);P_SPINS(d)::B(I)+S(H),DCHECK
      • Refutation
        • S(e);P_SPINS(d),XQ(E)
  • Actual
    • Q(E);
    • Threat
      • B(I)+S(H),DCHECK
    • Vars
      • K(f);S_FLIGHT::S(F)
      • S(d);P_SPINS(e),SBLOCK::P(B)
      • S(d);N_PINQ(E),P_SPINS(e)::QAB1(E)
      • S(e);N_PINQ(E),P_SPINS(d)::QAB1(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).