MESON Chess Problem Database

Problem Display
PID: 181239 (2b4K/6N1/8/b1Bk1p1p/Q1pPR3/8/2P1r3/3N1Bn1 w - - 0 1)

Howard, David M

Problem Observer, 2013

2b4K/6N1/8/b1Bk1p1p/Q1pPR3/8/2P1r3/3N1Bn1

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc2
      • 2.Re5#
    • 1...Rd2
      • 2.Re5#
    • 1...Rf2
      • 2.Re5#
    • 1...Rg2
      • 2.Re5#
    • 1...Rh2
      • 2.Re5#
    • 1...Rxe4
      • 2.Bxc4#
    • 1...Bc3
      • 2.Sxc3#
    • 1...Bb6
      • 2.Sc3#
    • 1...Bc7
      • 2.Sc3#
    • 1...Bd8
      • 2.Sc3#
  • Tries
    • 1.Rxe2?
      • threat
        • 2.Re5#
      • 1...Sxe2
        • 2.Bg2#
      • 1...Bc7
        • 2.Sc3#
      • 1...Sf3!
  • Keys
    • 1.Sxh5!
      • threat
        • 2.Sf6#
      • 1...Kxe4
        • 2.Qc6#
      • 1...Rxe4
        • 2.Bxc4#
      • 1...fxe4
        • 2.Sf4#
      • 1...Rh2
        • 2.Re5#
      • 1...Bd8
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD,XP(C)::R1(F)
    • R(b);N_GUARD::R1(F)
    • R(b);OGATE,SBLOCK,XR(F)::B(B),XP(c)
    • B(d);N_GUARD::S(A),XB(d)
    • B(d);N_GUARD::S(A)
  • Tries
    • Try
      • R(F);XR(b)
      • Threat
        • R1(F)
      • Vars
        • S(a);N_GUARD,XR(F)::B(B)
        • B(d);N_GUARD::S(A)
      • Refutation
        • S(a);
  • Actual
    • S(H);XP(g)
    • Threat
      • S(H)
    • Vars
      • K(e);S_FLIGHT,XR(F)::QAB(D)
      • R(b);OGATE,SBLOCK,XR(F)::B(B),XP(c)
      • P(f);SBLOCK,XR(F)::S(H)
      • R(b);N_GUARD,P_PINS(H)::R1(F)
      • B(d);N_GUARD::S(A)
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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).