MESON Chess Problem Database

Problem Display
PID: 266679 (8/3qQ3/rb3n1R/n2kN3/b7/B2P1N1B/2P1K3/8 w - - 0 1)

Saunders, Denis M

The Problemist, 1997

8/3qQ3/rb3n1R/n2kN3/b7/B2P1N1B/2P1K3/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh3
      • 2.Qd6#
    • 1...Qg4
      • 2.Qd6#
    • 1...Qb5
      • 2.Be6#
      • 2.Qd6#
      • 2.Qe6#
      • 2.Qf7#
    • 1...Qf5
      • 2.Qd6#
    • 1...Qe6
      • 2.Bxe6#
      • 2.Qxe6#
    • 1...Qc8
      • 2.Qd6#
    • 1...Qe8
      • 2.Be6#
      • 2.Qd6#
    • 1...Qd6
      • 2.Qxd6#
    • 1...Qa7
      • 2.Be6#
      • 2.Qd6#
      • 2.Qe6#
    • 1...Qb7
      • 2.Be6#
      • 2.Qd6#
      • 2.Qe6#
    • 1...Qc7
      • 2.Be6#
      • 2.Qe6#
    • 1...Qd8
      • 2.Be6#
      • 2.Qe6#
      • 2.Qf7#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bc7
      • 2.Qc5#
    • 1...Bd8
      • 2.Qc5#
    • 1...Sb3
      • 2.c4#
    • 1...Sc6
      • 2.c4#
    • 1...Sb7
      • 2.c4#
  • Tries
    • 1.Qxd7+?
      • 1...Sxd7
        • 2.Be6#
        • 2.Rd6#
      • 1...Bxd7!
    • 1.Qf7+?
      • 1...Qe6
        • 2.Bxe6#
        • 2.Qxe6#
      • 1...Qxf7!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sb4#
      • 1...Qe6+
        • 2.Qxe6#
      • 1...Qxe7+
        • 2.Sxe7#
      • 1...Kxc6
        • 2.Qxd7#
      • 1...Qxc6
        • 2.Qe5#
      • 1...Bxc6
        • 2.Qe5#
      • 1...Sxc6
        • 2.c4#
      • 1...Qg4
        • 2.Qd6#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Bc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_GUARD,XB(F)::QAR1(I)
    • Q(g);N_GUARD,P_PINS(E)::QAR1(I)
    • Q(g);N_GUARD::QAR1(I)
    • Q(g);N_GUARD::QAR1(I),XQ(g)
    • B(e);N_GUARD::QAR1(I),XB(e)
    • B(e);N_GUARD::QAR1(I)
    • S(b);N_GUARD::P(A)
  • Tries
    • Try
      • Q(I);CHECK,XQ(g)
      • Refutation
        • B(a);XQ(I)
    • Try
      • Q(I);CHECK
      • Refutation
        • Q(g);XQ(I)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • Q(g);CHECK,N_GUARD::QAB1(I),XQ(g)
      • Q(g);CHECK,XQ(I)::S(G),XQ(g)
      • K(c);P_SPINS(f),S_FLIGHT,XS(G)::QAB1(I),XQ(g)
      • Q(g);SBLOCK,XS(G)::QAR1(I)
      • B(a);SBLOCK,XS(G)::QAR1(I)
      • S(b);N_GUARD,SBLOCK,XS(G)::P(A)
      • Q(g);N_GUARD,P_PINS(E)::QAR1(I)
      • Q(g);N_GUARD::QAR1(I),XQ(g)
      • B(e);N_GUARD::QAR1(I),XB(e)
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