MESON Chess Problem Database

Problem Display
PID: 108866 (3N4/4P3/1p2P3/nQb2N1R/R1qB1k2/6pK/6B1/5n2 w - - 0 1)

Lender, Baruch

Northwest Chess, 1978

3N4/4P3/1p2P3/nQb2N1R/R1qB1k2/6pK/6B1/5n2

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Sxe6#
      • 2.Qxf1#
    • 1...Qxa4
      • 2.Qxf1#
    • 1...Qb4
      • 2.Qxf1#
    • 1...Ba3
      • 2.Be5#
      • 2.Qe5#
    • 1...Bb4
      • 2.Be5#
      • 2.Qe5#
    • 1...Bxe7
      • 2.Be5#
      • 2.Qe5#
  • Tries
    • 1.Sf7?
      • threat
        • 2.Be5#
      • 1...Qxd4
        • 2.Qxf1#
      • 1...Bxd4
        • 2.Rh4#
      • 1...Bd6
        • 2.Rh4#
      • 1...Sc6!
  • Keys
    • 1.Se3!
      • threat
        • 2.Rf5#
      • 1...Qxe6+
        • 2.Sxe6#
      • 1...Qxd4
        • 2.Sd5#
      • 1...Bxd4
        • 2.Qg5#
      • 1...Sxe3
        • 2.Be5#
      • 1...Qd3
        • 2.Sd5#
      • 1...Qd5
        • 2.Sxd5#
      • 1...Qc2
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • Q(c);OGATE,XR(C)::QAR(E),XS(a)
    • Q(c);OGATE::QAR(E),XS(a)
  • Tries
    • Try
      • S(J);
      • Threat
        • B(D)
      • Vars
        • Q(c);OGATE,P_SPINQ(c),XB(D)::QAR(E),XS(a)
        • B(f);XB(D)::R(G)
        • B(f);::R(G)
      • Refutation
        • S(e);
  • Actual
    • S(F);
    • Threat
      • R1(G)
    • Vars
      • Q(c);CHECK,XP(H)::S(J),XQ(c)
      • Q(c);N_GUARD,P_SPINQ(c),XB(D)::S(F)
      • B(f);OGATE,XB(D)::QAB1(E)
      • S(a);SBLOCK,XS(F)::B(D)
      • Q(c);N_GUARD::S(F)
      • Q(c);N_GUARD::S(F),XQ(c)
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