MESON Chess Problem Database

Problem Display
PID: 53732 (1Q6/N2p4/r2N1B2/p2k2K1/q2Pp3/1P5b/8/3R4 w - - 0 1)

Ellerman, Arnoldo

Chess Life, 1955

1Q6/N2p4/r2N1B2/p2k2K1/q2Pp3/1P5b/8/3R4

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.d5#
  • Tries
    • 1.Sdb5?
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qg8#
      • 1...Rxa7
        • 2.Qd6#
      • 1...Rd6
        • 2.Sc7#
        • 2.Qxd6#
      • 1...Re6
        • 2.Sc3#
      • 1...d6
        • 2.Sc7#
      • 1...Qxb3!
    • 1.Qb5+?
      • 1...Kxd6
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Qxb5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qe5#
      • 1...Ke6
        • 2.Qg8#
      • 1...Qxb3
        • 2.Qxb3#
      • 1...Rxa7
        • 2.Qd6#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Re6
        • 2.Se3#
      • 1...d6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(e);OGATE,S_FLIGHT::P(C)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(H)
      • Vars
        • K(e);S_FLIGHT::QAB(H)
        • R(f);N_GUARD,XS(G)::QAR1(H)
        • R(f);SBLOCK::S(E)
        • P(g);SBLOCK::S(E)
      • Refutation
        • Q(b);XP(B)
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);OGATE,P-FLIGHT,XS(E)::QAB1(H)
        • K(e);OGATE,S_FLIGHT::QAR1(H)
      • Refutation
        • Q(b);XQ(H)
  • Actual
    • S(E);
    • Threat
      • QAR1(H)
    • Vars
      • K(e);S_FLIGHT::QAB(H)
      • Q(b);OGATE,XP(B)::QAB(H),XQ(b)
      • R(f);N_GUARD,XS(G)::QAR1(H)
      • R(f);N_GUARD::QAR1(H),XR(f)
      • R(f);SBLOCK::S(E)
      • P(g);S_CUTR(f)::QAB(H)
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