MESON Chess Problem Database

Problem Display
PID: 273099 (1Q6/q3p3/1ppp4/8/P4R2/3Nnr1b/8/kBK1N3 w - - 0 1)

Lawton, Howard

Liverpool and Merseyside Illustrated, 1960

1Q6/q3p3/1ppp4/8/P4R2/3Nnr1b/8/kBK1N3

#2

7 + 9

15239 Valois Notebooks 2023
5454 Near Snap 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa4
      • 2.Rxa4#
    • 1...Be6
      • 2.Qh8#
    • 1...Sd1
      • 2.Sc2#
    • 1...Sf1
      • 2.Sc2#
    • 1...Sc2
      • 2.Sxc2#
    • 1...Sg2
      • 2.Sc2#
    • 1...Sc4
      • 2.Sc2#
    • 1...Sg4
      • 2.Sc2#
    • 1...Sd5
      • 2.Sc2#
    • 1...Sf5
      • 2.Sc2#
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sb3#
      • 1...Qxa4
        • 2.Rxa4#
      • 1...bxc5
        • 2.Qb2#
      • 1...dxc5
        • 2.Qe5#
      • 1...Be6
        • 2.Qh8#
      • 1...Sd1
        • 2.Sc2#
      • 1...Sf1
        • 2.Sc2#
      • 1...Sc2
        • 2.Sxc2#
      • 1...Sg2
        • 2.Sc2#
      • 1...Sc4
        • 2.Sc2#
      • 1...Sg4
        • 2.Sc2#
      • 1...Sd5
        • 2.Sc2#
      • 1...Sf5
        • 2.Sc2#

Anticipated by 226396(1945)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(h);OGATE,XP(E)::R(F),XQ(h)
    • B(d);S_CUTP(i)::QAB(G)
    • S(b);N_GUARD::S(C)
    • S(b);N_GUARD::S(C),XS(b)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • Q(h);OGATE,XP(E)::R(F),XQ(h)
      • P(e);OGATE,XS(D)::QAB1(G)
      • P(g);OGATE,XS(D)::QAB(G)
      • B(d);S_CUTP(i)::QAB(G)
      • S(b);N_GUARD::S(C)
      • S(b);N_GUARD::S(C),XS(b)
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