MESON Chess Problem Database

Problem Display
PID: 184272 (8/8/N1n1p1P1/2PkN1RK/2n1r1p1/2P2qb1/6Q1/7B w - - 0 1)

Stubbs, Arthur Goodwin

The Observer, 1928

(First published on Sun Apr 1 1928)

8/8/N1n1p1P1/2PkN1RK/2n1r1p1/2P2qb1/6Q1/7B

#2

9 + 8

15239 Valois Notebooks 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qxe4#
    • 1...Qf1
      • 2.Qxe4#
    • 1...Qf2
      • 2.Qxe4#
    • 1...Qxc3
      • 2.Qxe4#
    • 1...Qf6
      • 2.Qxe4#
    • 1...Qf7
      • 2.Qxe4#
    • 1...Qf8
      • 2.Qxe4#
  • Keys
    • 1.Sd7+!
      • 1...Qf5
        • 2.Qxe4#
      • 1...Re5
        • 2.Sf6#
      • 1...Be5
        • 2.Sc7#
      • 1...S4e5
        • 2.Sb6#
      • 1...S6e5
        • 2.Sb4#
      • 1...e5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • Q(a);OGATE,P_SPINR(d)::QAB1(B),XR(d)
    • Q(a);OGATE,P_SPINR(d),XP(C)::QAB1(B),XR(d)
    • Q(a);OGATE,P_PINP(I),P_SPINR(d)::QAB1(B),XR(d)
  • Actual
    • S(E);CHECK
    • Vars
      • Q(a);OGATE,P_PINR(F),P_SPINQ(a),P_SPINR(d)::QAB1(B),XR(d)
      • R(d);P_PINR(F),P_SPINQ(a),P_SPINR(d)::S(E)
      • B(b);P_SPINB(b)::S(H)
      • S(c);P_SPINS(c)::S(E)
      • S(g);P_SPINS(g)::S(H)
      • P(h);P_SPINP(h)::S(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).