MESON Chess Problem Database

Problem Display
PID: 7390 (8/1k6/2N1K3/P7/4Q3/8/8/8 w - - 0 1)

Neyndorff, Luke

StrateGems, 1999

8/1k6/2N1K3/P7/4Q3/8/8/8

#2

4 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Qb1+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Kxc6
        • 2.Qb6#
      • 1...Ka8
        • 2.Qb8#
      • 1...Kc8
        • 2.Qb8#
      • 1...Kc7!
    • 1.Qd3?
      • 1...Kc7
        • 2.Qd7#
      • 1...Ka8
        • 2.Qa6#
      • 1...Kc8
        • 2.Qd7#
      • 1...Kxc6!
    • 1.Qb4+?
      • 1...Ka6
        • 2.Qb6#
      • 1...Kxc6
        • 2.Qb6#
      • 1...Ka8
        • 2.Qb8#
      • 1...Kc8
        • 2.Qb8#
      • 1...Kc7!
  • Keys
    • 1.Qd4!
      • 1...Ka6
        • 2.Qb6#
      • 1...Kxc6
        • 2.Qb6#
      • 1...Kc7
        • 2.Qd7#
      • 1...Ka8
        • 2.Qa7#
      • 1...Kc8
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT,XS(C)::QAR1(A)
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAR2(A)
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);S_FLIGHT,XS(C)::QAR1(A)
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT,XS(C)::QAR1(A)
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAB1(A)
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