MESON Chess Problem Database

Problem Display
PID: 226489 (8/8/P1p1p3/3k4/2N5/3K4/Q7/8 w - - 0 1)

Schnabel, Rudolf

Kieler Schachgesellschaft, 1981

8/8/P1p1p3/3k4/2N5/3K4/Q7/8

#2

4 + 3

16882 KSG-Problemschach 1969-1987 (Muck/Laue) 1993

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qa5#
    • 1...c5
      • 2.Qg2#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qd4#
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...c5
        • 2.Qg2#
        • 2.Qb7#
      • 1...Kc5!
    • 1.Qd2?
      • 1...Kc5
        • 2.Qa5#
      • 1...c5
        • 2.Qg2#
      • 1...e5!
    • 1.Qe2?
      • threat
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...c5
        • 2.Qf3#
        • 2.Qg2#
        • 2.Qe4#
      • 1...Kc5!
    • 1.Qf2?
      • threat
        • 2.Qd4#
      • 1...c5
        • 2.Qg2#
        • 2.Qf3#
      • 1...e5!
    • 1.Qh2?
      • threat
        • 2.Qe5#
        • 2.Qd6#
      • 1...e5
        • 2.Qxe5#
      • 1...c5
        • 2.Qd6#
        • 2.Qh1#
        • 2.Qg2#
      • 1...Kc5!
    • 1.Qa4?
      • 1...Kc5
        • 2.Qa5#
      • 1...c5
        • 2.Qd7#
      • 1...e5!
    • 1.a7?
      • 1...Kc5
        • 2.Qa5#
      • 1...c5
        • 2.Qg2#
        • 2.a8Q#
        • 2.a8B#
      • 1...e5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qd4#
        • 2.Qe5#
      • 1...Kc5
        • 2.Qa5#
      • 1...e5
        • 2.Qxe5#
      • 1...c5
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
    • P(b);SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(A),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAB(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(c);::QAR1(A),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(A),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);OGATE,SBLOCK::QAR2(A)
      • Refutation
        • P(c);
    • Try
      • P(D);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • P(c);::QAR1(A),XP(c)
      • P(b);SBLOCK::QAB(A)
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