MESON Chess Problem Database

Problem Display
PID: 102399 (Q6b/3pB2B/1p6/5b2/1P1k1Pp1/6K1/npPN4/n2N4 w - - 0 1)

Elbaz, Mohamed Jamal

Europe Echecs, 1991

Q6b/3pB2B/1p6/5b2/1P1k1Pp1/6K1/npPN4/n2N4

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qxe4#
    • 1...Be6
      • 2.Qe4#
    • 1...Bf6
      • 2.Bxf6#
    • 1...b5
      • 2.Bc5#
    • 1...d5
      • 2.Qxh8#
  • Tries
    • 1.Bxf5?
      • threat
        • 2.Qe4#
      • 1...d5
        • 2.Qxh8#
      • 1...Sc3!
    • 1.Qc6?
      • threat
        • 2.Qc4#
        • 2.Qd6#
      • 1...Sxb4
        • 2.Qc4#
      • 1...Sc3
        • 2.Qc4#
      • 1...Bd3
        • 2.Qxd7#
        • 2.Qd6#
      • 1...Be4
        • 2.Qxe4#
        • 2.Qc4#
      • 1...Be6
        • 2.Qe4#
      • 1...Be5
        • 2.Qc4#
      • 1...b5
        • 2.Bc5#
        • 2.Qc5#
        • 2.Qd6#
      • 1...d5
        • 2.Qxb6#
      • 1...d6
        • 2.Qc4#
        • 2.Qxd6#
      • 1...dxc6!
    • 1.Qxa2?
      • threat
        • 2.Qc4#
      • 1...Bd3
        • 2.c3#
      • 1...Be6
        • 2.c3#
      • 1...b5
        • 2.Bc5#
      • 1...d5
        • 2.Qxb2#
      • 1...Sb3!
    • 1.Qc8?
      • threat
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Bd3
        • 2.Qxd7#
      • 1...b5
        • 2.Qc5#
      • 1...d5
        • 2.Qxh8#
      • 1...Be6!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Be6
        • 2.Qd3#
      • 1...b5
        • 2.Qd6#
      • 1...d5
        • 2.Qxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(f);N_GUARD::QAR1(I),XB(f)
    • B(f);N_GUARD::QAR1(I)
    • B(i);N_GUARD::B(G),XB(i)
    • P(g);N_GUARD::B(G)
    • P(h);SBLOCK::QAB(I),XB(i)
  • Tries
    • Try
      • B(H);XB(f)
      • Threat
        • QAR1(I)
      • Vars
        • P(h);SBLOCK::QAB(I),XB(i)
      • Refutation
        • S(b);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XP(E)::QAR1(I)
        • S(b);::QAR1(I)
        • B(f);N_GUARD::QAR1(I)
        • B(i);P_PINP(F)::QAR1(I)
        • P(h);SBLOCK::QAB(I),XP(g)
      • Refutation
        • P(h);XQ(I)
    • Try
      • Q(I);XS(b)
      • Threat
        • QAR1(I)
      • Vars
        • B(f);::P(B)
        • P(g);N_GUARD::B(G)
        • P(h);SBLOCK::QAB(I),XP(c)
      • Refutation
        • S(a);
    • Try
      • Q(I);
      • Threat
        • QAR1(I)
      • Vars
        • K(d);P-FLIGHT::QAB1(I)
        • B(f);N_GUARD::QAR(I),XP(h)
        • P(g);N_GUARD::QAB1(I)
        • P(h);SBLOCK::QAB(I),XB(i)
      • Refutation
        • B(f);
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • K(d);P-FLIGHT::QAB1(I)
      • B(f);N_GUARD::QAR1(I),XB(f)
      • B(f);N_GUARD::QAR1(I)
      • P(g);OGATE::QAR2(I)
      • P(h);SBLOCK::QAB(I),XP(g)
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