MESON Chess Problem Database

Problem Display
PID: 15875 (k7/p1K5/8/5p2/4b3/8/4B3/5Q2 w - - 0 1)

Ignatov, VN

Severnaya pravda, 1988

k7/p1K5/8/5p2/4b3/8/4B3/5Q2

#2

3 + 4

2838 Fun with Chess Miniatures 1996
145 StrateGems 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Bh1
      • 2.Qxh1#
    • 1...Bg2
      • 2.Qxg2#
    • 1...Bf3
      • 2.Bxf3#
      • 2.Qxf3#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qb8#
      • 1...Bb7
        • 2.Qxb7#
      • 1...Bxb1!
  • Keys
    • 1.Bf3!
      • 1...Bxf3
        • 2.Qxf3#
      • 1...a5
        • 2.Qa6#
      • 1...a6
        • 2.Qxa6#
      • 1...Bd5
        • 2.Bxd5#
      • 1...Bc6
        • 2.Bxc6#
      • 1...Bb7
        • 2.Bxb7#
      • 1...f4
        • 2.Bxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • B(a);OGATEB::QAB(A),XB(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(a);N_GUARD::QAB1(A),XB(a)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • B(B);P_PINB(a)
    • Vars
      • B(a);N_SPINB(a),OGATE,XB(B)::QAB(A),XB(a)
      • P(c);OGATEB::QAR2(A)
      • P(c);OGATEB::QAR2(A),XP(c)
      • B(a);OGATE::B(B),XB(a)
      • P(b);N_GUARD::B(B),XB(a)
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