MESON Chess Problem Database

Problem Display
PID: 140896 (8/8/8/8/7N/6kP/8/4K2Q w - - 0 1)

Abragam, David

Source?, 1999

8/8/8/8/7N/6kP/8/4K2Q

#2

4 + 1

15148 Sadier Collection 2011

SOLUTION

  • SOUND
  • Tries
    • 1.Qg2+?
      • 1...Kxh4
        • 2.Qg4#
      • 1...Kf4!
    • 1.Qe4?
      • 1...Kh2
        • 2.Qg2#
      • 1...Kxh3!
    • 1.Qf1?
      • 1...Kh2
        • 2.Qg2#
      • 1...Kxh4!
  • Keys
    • 1.Qf3+!
      • 1...Kh2
        • 2.Qg2#
      • 1...Kxh4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(D)::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
  • Actual
    • Q(B);CHECK
    • Vars
      • K(a);S_FLIGHT::QAR1(B)
      • K(a);S_FLIGHT,XS(D)::QAR1(B)
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