MESON Chess Problem Database

Problem Display
PID: 139901 (6b1/BKnN3r/p1N4p/P2P3R/2kr2BR/b2p1P2/3P4/1Q6 w - - 0 1)

Cross, H Holgate

The Problemist, 1938

6b1/BKnN3r/p1N4p/P2P3R/2kr2BR/b2p1P2/3P4/1Q6

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg4
      • 2.Rxg4#
    • 1...Rxd5
      • 2.Be6#
    • 1...Bc1
      • 2.Qb4#
    • 1...Bb4
      • 2.Qxb4#
    • 1...Bxd5
      • 2.Se5#
    • 1...Sb5
      • 2.Qa2#
    • 1...Sxd5
      • 2.Se5#
  • Keys
    • 1.d6!
      • threat
        • 2.Sb6#
        • 2.Qa2#
      • 1...Rxd7
        • 2.Qa2#
      • 1...Bb2
        • 2.Qa2#
      • 1...Rd5
        • 2.Be6#
      • 1...Bc5
        • 2.Rxc5#
      • 1...Bd5
        • 2.Se5#
      • 1...Sb5
        • 2.Qa2#
      • 1...Sd5
        • 2.Se5#
      • 1...Se6
        • 2.Qa2#
      • 1...Sa8
        • 2.Qa2#
      • 1...Se8
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(d);OGATE,P_SPINR(d),XB(D)::R(E),XR(d)
    • R(d);OGATEB,XP(G)::R(E)+B(D)
    • B(a);N_GUARD::QAR1(A)
    • B(a);N_GUARD::QAR1(A),XB(a)
    • B(i);P_PINS(I),SBLOCK,XP(G)::S(L)
    • S(g);P_PINS(L),SBLOCK::QAB(A)
    • S(g);P_PINS(L),SBLOCK,XP(G)::S(I)
  • Actual
    • P(G);
    • Threat
      • DUALS(2)
    • Vars
      • R(h);XS(L)::QAB(A)
      • B(a);::QAB(A)
      • R(d);S_CUTB(i),S_CUTS(g),S_CUTS(g)::R(E)+B(D)
      • B(a);N_GUARD::R1(H),XB(a)
      • B(i);P_PINS(I),SBLOCK::S(L)
      • S(g);P_PINS(L)::QAB(A)
      • S(g);P_PINS(L),SBLOCK::S(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).