MESON Chess Problem Database

Problem Display
PID: 137024 (BR6/pN2p3/rPP1P3/rkPpK3/bp1p4/1P6/1N6/2Q5 w - d5 0 1)

Barnes, Barry Peter

1st HM., Arbeiter Zeitung, 1971

BR6/pN2p3/rPP1P3/rkPpK3/bp1p4/1P6/1N6/2Q5

#2

11 + 9

56 The Problemist 1981
56 The Problemist 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Sd6#
  • Tries
    • 1.Qf1+?
      • 1...Kxc6
        • 2.Rc8#
      • 1...d3!
    • 1.Qc4+?
      • 1...Kxc6
        • 2.Sxa5#
        • 2.Sd6#
        • 2.Sd8#
        • 2.Rc8#
      • 1...dxc4!
    • 1.bxa4+?
      • 1...Kxc6
        • 2.Sxa5#
        • 2.Sd6#
        • 2.Sd8#
        • 2.Rc8#
      • 1...Rxa4!
  • Keys
    • 1.cxd5 ep!
      • threat
        • 2.Qc5#
      • 1...Kxb6+
        • 2.Sc5#
      • 1...exd6+
        • 2.Sxd6#
      • 1...Rxb6
        • 2.Qc4#
      • 1...axb6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT,XP(G)::B(J)+S(I)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(e);S_FLIGHT,XP(G)::R(K)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(f);XQ(A)
    • Try
      • P(C);CHECK,XB(a)
      • Refutation
        • R(d);XP(C)
  • Actual
    • P(D);EP,XP(f)
    • Threat
      • QAR1(A)
    • Vars
      • K(e);CHECK,P-FLIGHT,XP(F)::R(K)+S(I)
      • P(i);CHECK,XP(D)::S(I),XP(i)
      • R(g);SBLOCK,XP(F)::QAB1(A)
      • P(h);SBLOCK,XP(F)::QAB1(A)
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