MESON Chess Problem Database

Problem Display
PID: 77768 (8/3N4/8/8/3kP3/8/2PK4/3Q4 w - - 0 1)

Albert, Eugene

Zinoviev, Nikolai

Problemist Pribuzhya, 1991

8/3N4/8/8/3kP3/8/2PK4/3Q4

#2

5 + 1

5454 Near Snap 2009
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Qh5?
      • threat
        • 2.Qd5#
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxe4!
    • 1.Qa1+?
      • 1...Kc4
        • 2.Qa4#
      • 1...Kxe4!
    • 1.Qg1+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxe4!
    • 1.c3+?
      • 1...Kc4
        • 2.Qa4#
      • 1...Kxe4!
  • Keys
    • 1.c4!
      • 1...Kxc4
        • 2.Qa4#
      • 1...Kxe4
        • 2.Qg4#

Anticipated by 207974(1927), 53817(1942)

FEATURES

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