MESON Chess Problem Database

Problem Display
PID: 22730 (Q7/8/6P1/4KNkb/6B1/8/8/8 w - - 0 1)

Genkin, B

Chess Life & Review, 1979

Q7/8/6P1/4KNkb/6B1/8/8/8

#2

5 + 2

2786 More Fun with Chess Miniatures 2000
145 StrateGems 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kxg4
      • 2.Qg2#
    • 1...Kxg6
      • 2.Qg8#
  • Tries
    • 1.Qd8+?
      • 1...Kxg6
        • 2.Qg8#
      • 1...Kxg4!
    • 1.Qh8?
      • threat
        • 2.Qxh5#
      • 1...Kxg6
        • 2.Qg7#
        • 2.Qxh5#
        • 2.Qg8#
      • 1...Bxg4
        • 2.Qh6#
      • 1...Bxg6
        • 2.Qh4#
      • 1...Kxg4!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qxh5#
      • 1...Kxg4
        • 2.Qg2#
      • 1...Kxg6
        • 2.Qxh5#
      • 1...Bxg4
        • 2.Qh6#
      • 1...Bxg6
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XB(A)::QAR2(E)
    • K(a);OGATEB,P-FLIGHT,XP(D)::QAR2(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(D)::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT,XB(A)
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XB(b)
      • Vars
        • B(b);SBLOCK,XB(A)::QAB1(E)
        • B(b);OGATE,SBLOCK,XP(D)::QAB1(E)
      • Refutation
        • K(a);P-FLIGHT,XB(A)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E),XB(b)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XB(A)::QAR2(E)
      • K(a);P-FLIGHT,XP(D)::QAB1(E),XB(b)
      • B(b);OGATE,SBLOCK,XB(A)::QAB1(E)
      • B(b);SBLOCK,XP(D)::QAB1(E)
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