MESON Chess Problem Database

Problem Display
PID: 62971 (N2Nk1K1/1p1RppP1/1r6/1r5B/2b5/3p3Q/7b/8 w - - 0 1)

Eckett, SW

Chess, 1944

N2Nk1K1/1p1RppP1/1r6/1r5B/2b5/3p3Q/7b/8

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Bxf7#
    • 1...Re5
      • 2.Sc7#
    • 1...Rd6
      • 2.Sc7#
    • 1...Bg1
      • 2.Sc7#
    • 1...Bc7
      • 2.Sxc7#
    • 1...e5
      • 2.Sc7#
  • Tries
    • 1.Rxe7+?
      • 1...Kxd8
        • 2.Qd7#
      • 1...Kxe7!
  • Keys
    • 1.Sxf7!
      • threat
        • 2.Rd8#
      • 1...Bxf7+
        • 2.Bxf7#
      • 1...e6
        • 2.Se5#
      • 1...Rd5
        • 2.Sd6#
      • 1...Rd6
        • 2.Sc7#
      • 1...Bc7
        • 2.Sxc7#
      • 1...e5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(d);S_CUTB(c)::B(B),XP(h)
    • R(d);S_CUTB(a)::S(E)
    • R(e);S_CUTB(a)::S(E)
    • B(a);N_GUARD::S(E)
    • B(a);N_GUARD::S(E),XB(a)
    • P(g);S_CUTB(a)::S(E)
  • Tries
    • Try
      • R(C);CHECK,XP(g)
      • Vars
        • K(i);N_SPINP(h),P-FLIGHT,XS(F)::QAR1(A)
      • Refutation
        • K(i);N_SPINP(h),P-FLIGHT,XR(C)
  • Actual
    • S(F);P_SPINS(F),XP(h)
    • Threat
      • R1(C)
    • Vars
      • B(c);CHECK,OGATE,P_SPINB(c),XS(F)::B(B),XB(c)
      • P(g);N_PINS(F)::B(B)+S(F)
      • R(d);N_PINS(F)::B(B)+S(F),DCHECK
      • R(e);S_CUTB(a)::S(E)
      • B(a);N_GUARD::S(E),XB(a)
      • P(g);S_CUTB(a)::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).