MESON Chess Problem Database

Problem Display
PID: 28920 (B5Q1/3N4/4P3/5k2/1R4pp/KN4br/5Pn1/3b1r1q w - - 0 1)

Shire, David J

Problem Observer, 1981

B5Q1/3N4/4P3/5k2/1R4pp/KN4br/5Pn1/3b1r1q

#2

8 + 9

3256 David Shire Selected Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Bc2
      • 2.Qxg4#
    • 1...Bxb3
      • 2.Qxg4#
    • 1...Bf4
      • 2.Be4#
    • 1...Sf4
      • 2.Sd4#
  • Tries
    • 1.Rb5+?
      • 1...Kf4
        • 2.Qf7#
        • 2.Qg5#
        • 2.Qb8#
        • 2.Qf8#
      • 1...Be5!
  • Keys
    • 1.f4!
      • threat
        • 2.Qf7#
      • 1...Rxf4
        • 2.Rb5#
      • 1...Bxf4
        • 2.Be4#
      • 1...Sxf4
        • 2.Sd4#
      • 1...gxf4 ep
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAB1(H),XP(g)
    • B(a);N_GUARD,XS(C)::QAB1(H),XP(g)
    • B(e);P_PINS(C),SBLOCK::B(G)
    • S(d);SBLOCK::S(C)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • B(e);P_PINS(C),P_SPINB(e)
  • Actual
    • P(A);
    • Threat
      • QAR2(H)
    • Vars
      • R(b);SBLOCK,XP(A)::R(D)
      • B(e);P_PINS(C),SBLOCK,XP(A)::B(G)
      • S(d);SBLOCK,XP(A)::S(C)
      • P(g);EP,S_CUTB(a),XP(A)::QAB1(H)
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