MESON Chess Problem Database

Problem Display
PID: 219471 (4B3/8/8/1N1k2K1/N7/8/8/4Q3 w - - 0 1)

Ernst, Manfred

Schach-Report, 1991

4B3/8/8/1N1k2K1/N7/8/8/4Q3

#2

5 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sd6?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kxd6!
    • 1.Bc6+?
      • 1...Kc4
        • 2.Qc3#
      • 1...Kxc6!
    • 1.Qc3?
      • 1...Ke4
        • 2.Bc6#
      • 1...Ke6!
    • 1.Qg3?
      • 1...Ke4
        • 2.Sac3#
        • 2.Bc6#
      • 1...Ke6
        • 2.Qd6#
      • 1...Kc4!
    • 1.Qb4?
      • 1...Ke6
        • 2.Qd6#
        • 2.Qe4#
      • 1...Ke5!
    • 1.Qh4?
      • 1...Ke6
        • 2.Qe4#
      • 1...Ke5!
  • Keys
    • 1.Qb1!
      • 1...Kc4
        • 2.Bf7#
      • 1...Ke5
        • 2.Qf5#
      • 1...Ke6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • B(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XB(E)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::B(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::B(E)
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAR2(A)
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