MESON Chess Problem Database

Problem Display
PID: 76667 (2r5/2RRb1q1/2b3N1/1p2pp2/1rk1nQ2/6n1/1pPP1BK1/5N2 w - - 0 1)

Holladay, Edgar Dinwiddie

British Chess Magazine, 1952

2r5/2RRb1q1/2b3N1/1p2pp2/1rk1nQ2/6n1/1pPP1BK1/5N2

#2

9 + 12

6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qh6
      • 2.Sxe5#
    • 1...Qf8
      • 2.Sxe5#
    • 1...Qf7
      • 2.Sxe5#
    • 1...Qh7
      • 2.Sxe5#
    • 1...Qg8
      • 2.Sxe5#
  • Tries
    • 1.Rxc6+?
      • 1...Bc5
        • 2.Se3#
      • 1...Rxc6!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qd3#
      • 1...Sxd2
        • 2.Sxd2#
      • 1...Sxf2
        • 2.Qd5#
      • 1...Rb3
        • 2.Qxb3#
      • 1...Ra4
        • 2.Qb3#
      • 1...Sc3
        • 2.d3#
      • 1...Sc5
        • 2.Se3#
      • 1...Sg5
        • 2.Qd5#
      • 1...Sd6
        • 2.Qxc6#
      • 1...Sf6
        • 2.Sxe5#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 5
  • Sets
    • Q(k);N_GUARD::S(G),XP(g)
  • Tries
    • Try
      • R(H);CHECK,XB(i)
      • Vars
        • B(j);P_SPINB(j)::S(A)
      • Refutation
        • R(l);XR(H)
  • Actual
    • Q(F);N_PINS(e)
    • Threat
      • QAB1(F)
    • Vars
      • S(e);P_PINQ(F),XP(C)::S(A),XS(e)
      • S(e);OGATE,P_PINQ(F),XB(D)::QAB1(F)
      • R(c);N_GUARD::QAB1(F),XR(c)
      • R(c);N_GUARD::QAB1(F)
      • S(e);P_PINQ(F),SBLOCK::P(C)
      • S(e);N_SPINB(i),P_PINQ(F),SBLOCK::S(A)
      • S(e);OGATE,P_PINQ(F)::QAB1(F)
      • S(e);OGATE,P_PINQ(F)::QAR2(F),XB(i)
      • S(e);P_PINQ(F),S_CUTQ(k)::S(G),XP(g)
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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).