MESON Chess Problem Database

Problem Display
PID: 168587 (8/4N3/8/8/3PkP2/8/4K3/Q7 w - - 0 1)

Zimmer, Eligiusz

Best Problems, 2000

8/4N3/8/8/3PkP2/8/4K3/Q7

#2

5 + 1

5454 Near Snap 2018
6490 yacpdb 2018
3713 Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qb1+?
      • 1...Kxd4
        • 2.Qb4#
      • 1...Kxf4!
    • 1.Qh1+?
      • 1...Kxf4
        • 2.Qh4#
      • 1...Kxd4!
    • 1.Qa3?
      • threat
        • 2.Qe3#
      • 1...Kxd4
        • 2.Qb4#
      • 1...Kxf4!
    • 1.Qa5?
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qb4#
      • 1...Kxf4!
  • Keys
    • 1.Qe1!
      • 1...Kxd4
        • 2.Qb4#
      • 1...Kxf4
        • 2.Qh4#

Anticipated by 259247(1945), 11706(1971), 11951(1973)

This anticipates 180816(2017)

FEATURES

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