MESON Chess Problem Database

Problem Display
PID: 24244 (3B4/8/3b4/8/6p1/7k/8/5bQK w - - 0 1)

Lincoln, Robert A

Die Schwalbe, 1997

3B4/8/3b4/8/6p1/7k/8/5bQK

#2

3 + 4

2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Be2
      • 2.Qg2#
    • 1...Bg2+
      • 2.Qxg2#
    • 1...Bd3
      • 2.Qg2#
    • 1...Bc4
      • 2.Qg2#
    • 1...Bb5
      • 2.Qg2#
    • 1...Ba6
      • 2.Qg2#
    • 1...Bh2
      • 2.Qxh2#
    • 1...Ba3
      • 2.Qh2#
    • 1...Bg3
      • 2.Qxf1#
    • 1...Bb4
      • 2.Qh2#
    • 1...Bc5
      • 2.Qh2#
    • 1...Be7
      • 2.Qh2#
    • 1...Bf8
      • 2.Qh2#
  • Tries
    • 1.Qe3+?
      • 1...g3
        • 2.Qe6#
      • 1...Bg3!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qh4#
      • 1...Bg2+
        • 2.Qxg2#
      • 1...g3
        • 2.Qf5#
      • 1...Bg3
        • 2.Qxf1#
      • 1...Be7
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • B(a);N_GUARD::QAB1(A)
    • B(a);CHECK,N_GUARD::QAB1(A),XB(a)
    • B(d);N_GUARD::QAR1(A),XB(d)
    • B(d);N_GUARD,SBLOCK::QAR1(A)
    • B(d);SBLOCK::QAB(A),XB(a)
    • B(d);N_GUARD::QAR1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(c);OGATEB,P_SPINP(c),SBLOCK::QAB(A)
      • Refutation
        • B(d);P_SPINB(d)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(A),XB(a)
      • P(c);OGATEB,SBLOCK::QAB(A)
      • B(d);SBLOCK::QAB(A),XB(a)
      • B(d);N_GUARD::QAR1(A)
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