MESON Chess Problem Database

Problem Display
PID: 143060 (1n1bkB2/pQ2P1p1/qP2P3/pP1NKpP1/8/8/8/8 w - f5 0 1)

Simpson-Smith, D

Social Chess Quarterly (The), 1934

1n1bkB2/pQ2P1p1/qP2P3/pP1NKpP1/8/8/8/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bc7+
      • 2.Sxc7#
    • 1...Bxe7
      • 2.Qxe7#
    • 1...Sc6+
      • 2.Qxc6#
    • 1...Sd7+
      • 2.Qxd7#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Qc6+?
      • 1...Sd7+
        • 2.Qxd7#
      • 1...Sxc6+!
    • 1.Qc7?
      • threat
        • 2.Qxd8#
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Bxc7+
        • 2.Sxc7#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...Sd7+
        • 2.Qxd7#
      • 1...Qxb5
        • 2.Qxd8#
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Qxb6
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Bxe7
        • 2.Qxe7#
      • 1...axb6
        • 2.Qxd8#
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Qb7
        • 2.Qxd8#
        • 2.exd8Q#
        • 2.exd8R#
      • 1...a4
        • 2.Qxd8#
        • 2.exd8Q#
        • 2.exd8R#
      • 1...f4
        • 2.Qxd8#
        • 2.exd8Q#
        • 2.exd8R#
      • 1...g6
        • 2.Sf6#
        • 2.Qxd8#
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Qc8!
  • Keys
    • 1.gxf5 ep!
      • threat
        • 2.f7#
      • 1...Bc7+
        • 2.Sxc7#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...Sd7+
        • 2.Qxd7#
      • 1...gxf6+
        • 2.Sxf6#
      • 1...Bxe7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(g);CHECK,N_GUARD::S(B),XB(g)
    • B(g);OGATE,XP(H)::QAR1(G),XB(g)
    • S(f);CHECK,N_GUARD::QAB(G),XS(f)
    • S(f);CHECK,N_GUARD::QAB1(G),XS(f)
    • P(e);N_GUARD::S(B)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(f);CHECK,N_GUARD,P_SPINS(f)::QAB1(G),XS(f)
      • Refutation
        • S(f);CHECK,XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • B(g);CHECK,XQ(G)::S(B),XB(g)
        • S(f);CHECK,N_GUARD::QAB(G),XS(f)
        • S(f);CHECK,N_GUARD::QAB1(G),XS(f)
        • Q(c);XP(E)::PXB(g)=Q
        • B(g);OGATE,XP(H)::QAR1(G),XB(g)
      • Refutation
        • Q(c);
  • Actual
    • P(D);EP,XP(b)
    • Threat
      • P(D)
    • Vars
      • B(g);CHECK,N_GUARD::S(B),XB(g)
      • S(f);CHECK,N_GUARD::QAB(G),XS(f)
      • S(f);CHECK,N_GUARD::QAB1(G),XS(f)
      • P(e);CHECK,XP(D)::S(B),XP(e)
      • B(g);OGATE,XP(H)::QAR1(G),XB(g)
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