MESON Chess Problem Database

Problem Display
PID: 39648 (8/8/8/8/8/4pk1K/2Q3N1/8 w - - 0 1)

Lindner, Laszlo

Magyar Sakkvilag, 1933

8/8/8/8/8/4pk1K/2Q3N1/8

#2

3 + 2

4080 Mattbilder eines Lebens 1996
5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Qf5#
  • Tries
    • 1.Kh2?
      • 1...e2
        • 2.Qf5#
      • 1...Kg4!
    • 1.Qc4?
      • 1...e2
        • 2.Qf4#
      • 1...Kf2!
  • Keys
    • 1.Sh4+!
      • 1...Kf4
        • 2.Qf5#

Anticipated by 167307(1886), 227692(1926)

This anticipates 171371(1995)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(a);SBLOCK::QAR2(A)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(a);SBLOCK::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(a);SBLOCK::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(B);CHECK
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
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