MESON Chess Problem Database

Problem Display
PID: 48043 (8/N1N2n2/6Q1/2k5/8/2K5/8/7b w - - 0 1)

Ivanov, E

De Waarheid, 1969

8/N1N2n2/6Q1/2k5/8/2K5/8/7b

#2

4 + 3

4883 Still More Fun with Chess Miniatures 2002
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Sa6#
    • 1...Bc6
      • 2.Qxc6#
    • 1...Sd6
      • 2.Qg1#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Sa6#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Sd6
        • 2.Qe3#
      • 1...Bb7!
    • 1.Qf6?
      • threat
        • 2.Qd4#
      • 1...Bd5
        • 2.Sa6#
      • 1...Se5!
  • Keys
    • 1.Sc8!
      • threat
        • 2.Qb6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Bc6
        • 2.Qg1#

Anticipated by 17985(1952)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::S(D)
    • B(a);N_GUARD::QAR1(B),XB(a)
    • S(c);SBLOCK::QAB(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • S(D)
      • Vars
        • B(a);N_GUARD::QAR1(B),XB(a)
        • S(c);SBLOCK::QAB(B)
      • Refutation
        • B(a);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • B(a);SBLOCK::S(D)
      • Refutation
        • S(c);
  • Actual
    • S(C);
    • Threat
      • QAB1(B)
    • Vars
      • S(c);N_GUARD::QAB1(B),XS(c)
      • B(a);SBLOCK::QAB(B)
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