MESON Chess Problem Database

Problem Display
PID: 18885 (2Q5/5pK1/2r1N3/5k1p/3B1P2/3N1PP1/q1B5/4r3 w - - 0 1)

Lipton, Michael

3rd Prize, BCPS-40 JT, 1958-1960

2Q5/5pK1/2r1N3/5k1p/3B1P2/3N1PP1/q1B5/4r3

#2

9 + 6

3749 FIDE Album (1959-1961) 1966
3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Sets
    • 1...h4
      • 2.g4#
    • 1...fxe6
      • 2.Qf8#
  • Tries
    • 1.Sb2+?
      • 1...Re4
        • 2.Bxe4#
      • 1...Rxc2!
    • 1.Sdc5+?
      • 1...Re4
        • 2.Bxe4#
      • 1...Qxc2!
    • 1.Bb2?
      • threat
        • 2.Sd4#
      • 1...Rexe6
        • 2.Sc5#
      • 1...Rcxe6
        • 2.Sxe1#
      • 1...fxe6
        • 2.Qf8#
      • 1...Qxe6!
    • 1.Bc3?
      • threat
        • 2.Sd4#
      • 1...Qxe6
        • 2.Sxe1#
      • 1...Rexe6
        • 2.Sb2#
      • 1...fxe6
        • 2.Qf8#
      • 1...Rcxe6!
    • 1.Bc5?
      • threat
        • 2.Sd4#
      • 1...Qxe6
        • 2.Sxe1#
      • 1...Rexe6
        • 2.Sb2#
      • 1...fxe6
        • 2.Qf8#
      • 1...Rcxe6!
    • 1.Qd8?
      • threat
        • 2.Qf6#
      • 1...Qxe6
        • 2.Qg5#
      • 1...Rexe6
        • 2.Qg5#
      • 1...Rcxe6
        • 2.Qg5#
      • 1...f6
        • 2.Qxf6#
      • 1...Kxe6!
  • Keys
    • 1.Be3!
      • threat
        • 2.Sd4#
      • 1...Qxe6
        • 2.Sc5#
      • 1...Rxe6
        • 2.Sb2#
      • 1...fxe6
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::P(D)
    • P(f);OGATEB,P_SPINP(f),SBLOCK,XS(G)::QAR(I)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(A),XR(a)
      • Refutation
        • R(e);XB(A)
    • Try
      • S(B);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::B(A),XR(a)
      • Refutation
        • Q(b);XB(A)
    • Try
      • B(E);
      • Threat
        • QAB(I)+S(G),DCHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a),XS(G)::B(A)+S(B)
        • R(e);N_GUARD,P_SPINR(e),XS(G)::B(A)+S(B),XR(a)
        • P(f);OGATEB,P_SPINP(f),SBLOCK,XS(G)::QAR(I)
      • Refutation
        • Q(b);P_SPINQ(b),XS(G)
    • Try
      • B(E);
      • Threat
        • QAB(I)+S(G),DCHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b),XS(G)::B(A)+S(B),XR(a)
        • R(a);N_GUARD,P_SPINR(a),XS(G)::B(A)+S(B)
        • P(f);OGATEB,P_SPINP(f),SBLOCK,XS(G)::QAR(I)
      • Refutation
        • R(e);P_SPINR(e),XS(G)
    • Try
      • B(E);
      • Threat
        • QAB(I)+S(G),DCHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b),XS(G)::B(A)+S(B),XR(a)
        • R(a);N_GUARD,P_SPINR(a),XS(G)::B(A)+S(B)
        • P(f);OGATEB,P_SPINP(f),SBLOCK,XS(G)::QAR(I)
      • Refutation
        • R(e);P_SPINR(e),XS(G)
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • Q(b);SBLOCK,XS(G)::QAR1(I)
        • R(a);SBLOCK,XS(G)::QAR1(I)
        • R(e);SBLOCK,XS(G)::QAR1(I)
        • P(f);::QAR1(I),XP(f)
      • Refutation
        • K(c);S_FLIGHT,XS(G)
  • Actual
    • B(E);
    • Threat
      • QAB(I)+S(G),DCHECK
    • Vars
      • Q(b);N_GUARD,P_SPINQ(b),XS(G)::B(A)+S(B)
      • R(e);N_GUARD,P_SPINR(e),XS(G)::B(A)+S(B)
      • P(f);OGATEB,P_SPINP(f),SBLOCK,XS(G)::QAR(I)
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