MESON Chess Problem Database

Problem Display
PID: 287266 (8/K2Q3p/ppr1B3/r2NkPP1/8/3bP3/5N2/b7 w - - 0 1)

Holladay, Edgar Dinwiddie

The Problemist, 1950

8/K2Q3p/ppr1B3/r2NkPP1/8/3bP3/5N2/b7

#2

8 + 8

6490 yacpdb 2026

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Qxd5#
    • 1...Rd6
      • 2.Qg7#
    • 1...Rxe6
      • 2.Qxe6#
    • 1...Rc7+
      • 2.Qxc7#
    • 1...Be4
      • 2.Sg4#
  • Tries
    • 1.Qc7+?
      • 1...Rd6
        • 2.Qg7#
      • 1...Rxc7+!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Sbxd3#
        • 2.Sxc6#
      • 1...Rc7+
        • 2.Qxc7#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Bxf5
        • 2.Sxc6#
      • 1...Ra3
        • 2.Sxc6#
        • 2.Qd5#
      • 1...Rac5
        • 2.Sbxd3#
      • 1...Rd5
        • 2.Sxc6#
        • 2.Qxd5#
      • 1...Rc1
        • 2.Sbxd3#
      • 1...Rc2
        • 2.Sbxd3#
      • 1...Rc3
        • 2.Qd4#
      • 1...Rc4
        • 2.Sbxd3#
      • 1...Rcc5
        • 2.Sbxd3#
      • 1...Rd6
        • 2.Qg7#
      • 1...Rc8
        • 2.Sbxd3#
      • 1...Bb1
        • 2.Sxc6#
      • 1...Bf1
        • 2.Sxc6#
      • 1...Bc2
        • 2.Sxc6#
      • 1...Be2
        • 2.Sxc6#
      • 1...Bc4
        • 2.Sxc6#
      • 1...Be4
        • 2.Sg4#
      • 1...Bb5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 14
    • REMOVED MATES = 1
  • Sets
    • R(c);OGATE,XS(C)::QAR1(H),XR(c)
    • R(g);SBLOCK::QAB(H)
    • R(g);OGATE,XB(F)::QAR1(H),XR(g)
    • R(g);CHECK,N_GUARD::QAB(H),XR(g)
    • B(b);SBLOCK::S(A)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • R(g);P_SPINR(g),SBLOCK::QAB(H)
      • Refutation
        • R(g);CHECK,XQ(H)
  • Actual
    • S(C);
    • Threat
      • DUALS(2)
    • Vars
      • R(g);CHECK,N_GUARD::QAB(H),XR(g)
      • R(g);OGATE,XB(F)::QAR1(H),XR(g)
      • B(b);XP(D)::S(C),XR(g)
      • R(c);::S(C),XB(b)
      • R(g);::S(C),XB(b)
      • R(g);S_CUTB(a)::QAB1(H)
      • R(g);SBLOCK::QAB(H)
      • B(b);::S(C),XR(g)
      • B(b);SBLOCK::S(A)
      • B(b);S_CUTR(c)::QAR1(H)
HTML5 logo

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).