MESON Chess Problem Database

Problem Display
PID: 221683 (6Q1/3pqn2/b2Np3/PBk1N1p1/2P1P1P1/P7/3R4/K7 w - - 0 1)

Kelly, Reginald

The Field, 1893

(First published on Sat Jan 14 1893)

6Q1/3pqn2/b2Np3/PBk1N1p1/2P1P1P1/P7/3R4/K7

#2

11 + 7

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qf8
      • 2.Sxd7#
    • 1...Bxb5
      • 2.Sb7#
    • 1...Bb7
      • 2.Sxb7#
    • 1...Bc8
      • 2.Qxc8#
  • Tries
    • 1.Sd3+?
      • 1...Kxd6
        • 2.Qb8#
      • 1...Kd4!
    • 1.Qxg5?
      • threat
        • 2.Sxd7#
        • 2.Qe3#
      • 1...Qxg5
        • 2.Sxd7#
      • 1...Qxd6
        • 2.Sxd7#
      • 1...Bxb5
        • 2.Sb7#
        • 2.Qe3#
      • 1...Sxe5
        • 2.Qe3#
        • 2.Qxe5#
      • 1...Qf6
        • 2.Qe3#
      • 1...Sxg5!
  • Keys
    • 1.Qf8!
      • 1...Qxd6
        • 2.Sxd7#
      • 1...Qxf8
        • 2.Sxd7#
      • 1...Bxb5
        • 2.Sb7#
      • 1...Sxe5
        • 2.Qf2#
      • 1...Sxd6
        • 2.Qf2#
      • 1...Qd8
        • 2.Sb7#
      • 1...Qf6
        • 2.Sb7#
      • 1...Qe8
        • 2.Sb7#
      • 1...Bb7
        • 2.Sxb7#
      • 1...Bc8
        • 2.Qxc8#
      • 1...Sh6
        • 2.Qf2#
      • 1...Sd8
        • 2.Qf2#
      • 1...Sh8
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • Q(f);N_GUARD::S(I),XP(e)
    • B(c);N_GUARD,XB(H)::S(J)
    • B(c);N_GUARD::S(J),XB(c)
    • B(c);N_GUARD::QAR(K),XB(c)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(J)::QAB(K)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(K);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);XQ(K)::S(I),XP(e)
        • Q(f);XS(J)::QAR(K)+S(I),DCHECK,XP(e)
        • Q(f);P_PINS(I)::QAB(K)
      • Refutation
        • S(g);XQ(K)
  • Actual
    • Q(K);
    • Vars
      • Q(f);N_GUARD,P_SPINQ(f),XS(J)::S(I),XP(e)
      • Q(f);N_GUARD,XQ(K)::S(I),XP(e)
      • B(c);N_GUARD,XB(H)::S(J)
      • S(g);OGATE,XS(I)::QAB(K)
      • S(g);OGATE,XS(J)::QAB(K)
      • Q(f);::QAB(K)+S(J),DCHECK
      • Q(f);P_PINS(I)::QAB(K)+S(J),DCHECK
      • B(c);N_GUARD::S(J),XB(c)
      • B(c);N_GUARD::QAR(K),XB(c)
      • S(g);OGATE::QAB(K)
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