MESON Chess Problem Database

Problem Display
PID: 95367 (K7/8/1pk1P3/4P3/4P3/P7/8/1Q6 w - - 0 1)

Gruber, Hans

Sachsische Zeitung, 1978

K7/8/1pk1P3/4P3/4P3/P7/8/1Q6

#2

6 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qd1?
      • 1...Kc5
        • 2.Qd5#
      • 1...Kc7
        • 2.Qd7#
      • 1...b5
        • 2.Qd6#
      • 1...Kb5!
    • 1.Qb4?
      • threat
        • 2.Qc4#
      • 1...b5
        • 2.Qd6#
      • 1...Kc7!
    • 1.Qb5+?
      • 1...Kc7
        • 2.Qd7#
      • 1...Kxb5!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qd5#
      • 1...Kc7
        • 2.Qd7#
      • 1...b5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
        • P(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • P(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • P(a);SBLOCK::QAR1(A)
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