MESON Chess Problem Database

Problem Display
PID: 15785 (5B2/8/4Bk2/1Q3P2/7K/8/8/b7 w - - 0 1)

Steiner, Paul

The Problemist, 1987

5B2/8/4Bk2/1Q3P2/7K/8/8/b7

#2

5 + 2

2838 Fun with Chess Miniatures 1996
145 StrateGems 2011
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qxb2#
  • Tries
    • 1.Bg7+?
      • 1...Ke7
        • 2.Qd7#
      • 1...Kxg7!
    • 1.Qc5?
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Be5
        • 2.Qe7#
      • 1...Bb2!
  • Keys
    • 1.Qb4!
      • 1...Ke5
        • 2.Bg7#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bb2
        • 2.Qxb2#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Be5
        • 2.Qe7#

This anticipates 206072(2018)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB(B),XB(a)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XB(E)
    • Try
      • Q(B);
      • Vars
        • B(a);N_GUARD::QAB(B),XB(a)
        • B(a);SBLOCK::QAB1(B)
      • Refutation
        • B(a);
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT::B(E)
      • B(a);N_GUARD::QAB(B),XB(a)
      • B(a);SBLOCK::QAB1(B)
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