MESON Chess Problem Database

Problem Display
PID: 51137 (1Nk5/1R1p3K/8/n1q5/N6B/b1Q5/8/1R6 w - - 0 1)

Allison, Christopher John

Manchester Guardian, 1951

1Nk5/1R1p3K/8/n1q5/N6B/b1Q5/8/1R6

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7
      • 2.Rxc7#
      • 2.Qxc7#
    • 1...d5
      • 2.Qh3#
    • 1...d6
      • 2.Qh8#
  • Keys
    • 1.Sa6!
      • threat
        • 2.Rb8#
      • 1...Sxb7
        • 2.Sb6#
      • 1...Sc6
        • 2.Rc7#
      • 1...d5
        • 2.Qh3#
      • 1...d6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATEB::QAB(B)
    • P(d);::QAR(B)
  • Actual
    • S(G);
    • Threat
      • R1(E)
    • Vars
      • S(b);SBLOCK,XR(E)::S(C)
      • S(b);N_SPINQ(c),S_CUTQ(c)::R1(E)
      • P(d);OGATEB::QAB(B)
      • P(d);::QAR(B)
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