MESON Chess Problem Database

Problem Display
PID: 20966 (8/7n/4Q3/6Nk/8/8/3B4/1K6 w - - 0 1)

de Waard, RH

Op de Hoogte, 1914

8/7n/4Q3/6Nk/8/8/3B4/1K6

#2

4 + 2

2838 Fun with Chess Miniatures 1996
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Qh3#
  • Tries
    • 1.Sf3?
      • 1...Sf6
        • 2.Qf5#
      • 1...Sf8
        • 2.Qf5#
      • 1...Sg5!
    • 1.Qh6+?
      • 1...Kg4
        • 2.Qh3#
      • 1...Kxh6!
  • Keys
    • 1.Qf5!
      • 1...Kh4
        • 2.Qh3#
      • 1...Kh6
        • 2.Qxh7#
      • 1...Sxg5
        • 2.Qxg5#
      • 1...Sf6
        • 2.Sf3#
      • 1...Sf8
        • 2.Sf3#

This anticipates 227644(1926)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(D)
  • Tries
    • Try
      • S(C);
      • Vars
        • S(b);N_GUARD::QAR2(D)
      • Refutation
        • S(b);
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Vars
      • K(a);P-FLIGHT::QAR1(D)
      • K(a);P-FLIGHT::QAR1(D),XS(b)
      • S(b);OGATE,P_SPINS(b),XS(C)::QAR1(D),XS(b)
      • S(b);N_GUARD::QAR(D)+S(C)
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