MESON Chess Problem Database

Problem Display
PID: 76500 (b7/1B4pK/1B1rr1N1/1n3R2/2k5/1nPqp3/1PP3Q1/3N4 w - - 0 1)

Holladay, Edgar Dinwiddie

To Alain White, 1945

b7/1B4pK/1B1rr1N1/1n3R2/2k5/1nPqp3/1PP3Q1/3N4

#2

10 + 9

6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sxe5#
    • 1...Rf6
      • 2.Se5#
    • 1...Sa1
      • 2.Rc5#
    • 1...Sc1
      • 2.Rc5#
    • 1...Sd2
      • 2.Rc5#
    • 1...S3d4
      • 2.Rc5#
    • 1...Sa5
      • 2.Rc5#
    • 1...Sc5
      • 2.Rxc5#
  • Tries
    • 1.Qc6+?
      • 1...Sc5
        • 2.Rxc5#
        • 2.Qxc5#
        • 2.b3#
      • 1...Rxc6!
  • Keys
    • 1.Rf4+!
      • 1...Qe4
        • 2.Sxe3#
      • 1...Qd4
        • 2.Qe2#
      • 1...Rd4
        • 2.Qd5#
      • 1...Re4
        • 2.Se5#
      • 1...S3d4
        • 2.b3#
      • 1...S5d4
        • 2.Ba6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(g);N_GUARD::S(H),XR(g)
    • R(g);N_GUARD::S(H)
    • S(a);N_GUARD::R1(F)
    • S(a);N_GUARD::R1(F),XS(a)
  • Tries
    • Try
      • Q(D);CHECK
      • Refutation
        • R(f);XQ(D)
  • Actual
    • R(F);CHECK,P_SPINS(H)
    • Vars
      • Q(b);P_SPINQ(b)::S(A),XP(c)
      • Q(b);N_PINS(H),P_SPINQ(b),S_CUTR(f),S_CUTR(g),S_CUTS(a),S_CUTS(e)::QAB(D)
      • R(f);P_SPINR(f)::QAB1(D)
      • R(g);N_PINS(H),P_SPINR(g)::S(H)
      • S(a);OGATE,P_SPINS(a)::P(B)
      • S(e);P_SPINS(e),S_CUTB(i),S_CUTQ(b),S_CUTQ(b),S_CUTR(f),S_CUTR(g),S_CUTS(a)::B(I)
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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).