MESON Chess Problem Database

Problem Display
PID: 107159 (8/8/8/8/2K5/k7/p6Q/8 w - - 0 1)

Kniest, Alfred

Freie Presse, 1966

8/8/8/8/2K5/k7/p6Q/8

#2

2 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qxa2#
  • Tries
    • 1.Qg1?
      • 1...Ka4
        • 2.Qa7#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1S
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...Kb2!
    • 1.Qe5?
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1S
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...Ka4!
    • 1.Qd6+?
      • 1...Ka4
        • 2.Qb4#
        • 2.Qa6#
      • 1...Kb2!
    • 1.Qb8?
      • threat
        • 2.Qb3#
        • 2.Qb4#
      • 1...Ka4
        • 2.Qa7#
        • 2.Qb4#
        • 2.Qa8#
      • 1...a1Q
        • 2.Qb3#
      • 1...a1B
        • 2.Qb3#
      • 1...a1R
        • 2.Qb3#
      • 1...a1S!
    • 1.Qh1?
      • 1...Ka4
        • 2.Qa8#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1S
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#
      • 1...Kb2!
    • 1.Qb2+?
      • 1...Ka4
        • 2.Qxa2#
        • 2.Qb4#
      • 1...Kxb2!
  • Keys
    • 1.Qh8!
      • 1...Ka4
        • 2.Qa8#
      • 1...a1Q
        • 2.Qxa1#
      • 1...a1S
        • 2.Qxa1#
      • 1...a1B
        • 2.Qxa1#
      • 1...a1R
        • 2.Qxa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(A),XP(a)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR(A)
        • P(a);OGATEB::QAR2(A),XQ(a)
        • P(a);OGATEB::QAR2(A),XS(a)
        • P(a);OGATEB::QAR2(A),XB(a)
        • P(a);OGATEB::QAR2(A),XR(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::QAR2(A),XQ(a)
        • P(a);OGATEB::QAR2(A),XS(a)
        • P(a);OGATEB::QAR2(A),XB(a)
        • P(a);OGATEB::QAR2(A),XR(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR(A)
        • P(a);OGATEB::QAR2(A),XQ(a)
        • P(a);OGATEB::QAR2(A),XS(a)
        • P(a);OGATEB::QAR2(A),XB(a)
        • P(a);OGATEB::QAR2(A),XR(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR(A)
      • P(a);OGATEB::QAR2(A),XQ(a)
      • P(a);OGATEB::QAR2(A),XS(a)
      • P(a);OGATEB::QAR2(A),XB(a)
      • P(a);OGATEB::QAR2(A),XR(a)
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