MESON Chess Problem Database

Problem Display
PID: 174876 (r1b5/2B2p1K/1N2Pk2/2n1p2Q/8/8/8/8 w - - 0 1)

Brummelman, Derk Hendrikus (AKA Bruma, DH)

Busmen's Chess Review, 1961

r1b5/2B2p1K/1N2Pk2/2n1p2Q/8/8/8/8

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Qxe5#
    • 1...Ke7
      • 2.Qxf7#
    • 1...Sxe6
      • 2.Sd5#
    • 1...fxe6
      • 2.Bd8#
  • Tries
    • 1.Qg6+?
      • 1...Ke7
        • 2.Qxf7#
      • 1...fxg6!
    • 1.Qf5+?
      • 1...Ke7
        • 2.Qxf7#
      • 1...Kxf5!
    • 1.Qg5+?
      • 1...Kxe6
        • 2.Qxe5#
      • 1...Kxg5!
  • Keys
    • 1.Kh6!
      • threat
        • 2.Qxf7#
      • 1...Kxe6
        • 2.Qxe5#
      • 1...Ke7
        • 2.Qxf7#
      • 1...Bxe6
        • 2.Qg5#
      • 1...Sxe6
        • 2.Sd5#
      • 1...fxe6
        • 2.Bd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,XP(C)::QAR1(A),XP(b)
    • K(c);S_FLIGHT::QAR1(A),XP(d)
    • S(a);SBLOCK,XP(C)::S(B)
    • P(d);SBLOCK,XP(C)::B(D)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(A),XP(d)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(A),XP(d)
      • Refutation
        • K(c);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(C)::QAR1(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • K(E);P-FLIGHT
    • Threat
      • QAR1(A),XP(d)
    • Vars
      • K(c);P-FLIGHT,XP(C)::QAR1(A),XP(b)
      • K(c);S_FLIGHT::QAR1(A),XP(d)
      • B(f);SBLOCK,XP(C)::QAB1(A)
      • S(a);SBLOCK,XP(C)::S(B)
      • P(d);SBLOCK,XP(C)::B(D)
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