MESON Chess Problem Database

Problem Display
PID: 73687 (1b3n2/3p1Q1p/4pP1P/1KP1k2p/RN3N1p/4PRn1/8/1B6 w - - 0 1)

Barth, Michael

2nd Prize, Freie Presse, 1993

1b3n2/3p1Q1p/4pP1P/1KP1k2p/RN3N1p/4PRn1/8/1B6

#2

11 + 9

6113 Problemschach-Jahrbuch (1993) 1994
6114 Problemschach-Jahrbuch (1994) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Sfd3#
    • 1...Sf5
      • 2.Sbd3#
    • 1...d5
      • 2.Sc6#
    • 1...d6
      • 2.Sc6#
  • Tries
    • 1.Be4?
      • threat
        • 2.Sbd3#
      • 1...Sxe4
        • 2.Sfd3#
      • 1...Kxe4!
    • 1.Bf5?
      • threat
        • 2.Sfd3#
      • 1...Sxf5
        • 2.Sbd3#
      • 1...exf5
        • 2.Sbd3#
      • 1...Kxf5!
    • 1.Qxh7?
      • threat
        • 2.Sfd3#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Sxh7
        • 2.Sg6#
      • 1...Sg6
        • 2.Sxg6#
      • 1...Sf5!
    • 1.e4?
      • threat
        • 2.Sbd3#
      • 1...Kd4
        • 2.Sc6#
      • 1...Sxe4!
  • Keys
    • 1.Qg7!
      • threat
        • 2.f7#
      • 1...Se4
        • 2.Sfd3#
      • 1...Sf5
        • 2.Sbd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • S(a);SBLOCK::S(F)
    • S(a);SBLOCK::S(E)
    • P(f);N_GUARD::S(E)
  • Tries
    • Try
      • B(A);
      • Threat
        • S(E)
      • Vars
        • S(a);SBLOCK,XB(A)::S(F)
      • Refutation
        • K(c);P-FLIGHT,XB(A)
    • Try
      • B(A);
      • Threat
        • S(F)
      • Vars
        • S(a);SBLOCK,XB(A)::S(E)
        • P(e);SBLOCK,XB(A)::S(E)
      • Refutation
        • K(c);P-FLIGHT,XB(A)
    • Try
      • Q(K);XP(g)
      • Threat
        • S(F)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(I)::QAB1(K)
        • S(i);N_GUARD,XQ(K)::S(F)
        • S(i);N_GUARD::S(F),XS(i)
      • Refutation
        • S(a);
    • Try
      • P(B);
      • Threat
        • S(E)
      • Vars
        • K(c);S_FLIGHT::R(D)+S(E),DCHECK
      • Refutation
        • S(a);XP(B)
  • Actual
    • Q(K);
    • Threat
      • QAB(K)+P(I)
    • Vars
      • S(a);SBLOCK::S(F)
      • S(a);SBLOCK::S(E)
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