MESON Chess Problem Database

Problem Display
PID: 194801 (6K1/2n3B1/8/N7/1p6/kB6/Nr6/8 w - - 0 1)

Sumner, Christopher Richard Benson

The Observer, 1941

(First published on Sun Sep 7 1941)

6K1/2n3B1/8/N7/1p6/kB6/Nr6/8

#2

5 + 4

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Keys
    • 1.Sc3!
      • 1...Rxb3
        • 2.Sc4#
      • 1...bxc3
        • 2.Bf8#
      • 1...Rb1
        • 2.Sxb1#
      • 1...Ra2
        • 2.Sb1#
      • 1...Rc2
        • 2.Sb1#
      • 1...Rd2
        • 2.Sb1#
      • 1...Re2
        • 2.Sb1#
      • 1...Rf2
        • 2.Sb1#
      • 1...Rg2
        • 2.Sb1#
      • 1...Rh2
        • 2.Sb1#
      • 1...Sb5
        • 2.Sxb5#
      • 1...Sd5
        • 2.Sb5#
      • 1...Sa6
        • 2.Sb5#
      • 1...Se6
        • 2.Sb5#
      • 1...Sa8
        • 2.Sb5#
      • 1...Se8
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 16
    • REMOVED MATES = 0
  • Sets
  • Actual
    • S(A);
    • Vars
      • R(a);SBLOCK,XB(B)::S(C)
      • P(c);OGATEB,XS(A)::B(D)
      • R(a);N_GUARD::S(A),XR(a)
      • R(a);N_GUARD::S(A)
      • R(a);N_GUARD,P_PINB(D)::S(A)
      • R(a);N_GUARD,SBLOCK::S(A)
      • S(d);N_GUARD::S(A),XS(d)
      • S(d);N_GUARD::S(A)
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