MESON Chess Problem Database

Problem Display
PID: 73428 (Q7/B7/n7/3p2pp/7k/4p2P/3n1PP1/4N1K1 w - - 0 1)

Overath, Lothar

Badische Neueste Nachrichten, 1993

Q7/B7/n7/3p2pp/7k/4p2P/3n1PP1/4N1K1

#2

7 + 7

6113 Problemschach-Jahrbuch (1993) 1994
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sf3#
    • 1...Sf1
      • 2.Sf3#
    • 1...Sb3
      • 2.Sf3#
    • 1...Sf3+
      • 2.Sxf3#
    • 1...Sc4
      • 2.Sf3#
    • 1...Se4
      • 2.Sf3#
    • 1...exf2+
      • 2.Bxf2#
    • 1...g4
      • 2.Qd8#
  • Tries
    • 1.Kh2?
      • threat
        • 2.g3#
      • 1...Sf3+
        • 2.Sxf3#
      • 1...g4
        • 2.Qd8#
      • 1...Se4
        • 2.Sf3#
      • 1...Sf1+!
  • Keys
    • 1.Qc8!
      • threat
        • 2.g3#
      • 1...Sf3+
        • 2.Sxf3#
      • 1...exf2+
        • 2.Bxf2#
      • 1...g4
        • 2.Qd8#
      • 1...Sf1
        • 2.Sf3#
      • 1...Se4
        • 2.Sf3#

Anticipated by 213148(1988)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::S(A)
    • S(a);CHECK,N_GUARD::S(A),XS(a)
    • P(b);CHECK,OGATE,XP(C)::B(F),XP(b)
    • P(e);OGATEB::QAB(G)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • P(D)
      • Vars
        • S(a);CHECK,N_GUARD::S(A),XS(a)
        • P(e);OGATEB::QAB(G)
        • S(a);N_GUARD::S(A)
      • Refutation
        • S(a);CHECK
  • Actual
    • Q(G);
    • Threat
      • P(D)
    • Vars
      • S(a);CHECK,N_GUARD::S(A),XS(a)
      • P(b);CHECK,OGATE,XP(C)::B(F),XP(b)
      • P(e);OGATEB::QAB(G)
      • S(a);N_GUARD::S(A)
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