MESON Chess Problem Database

Problem Display
PID: 16473 (1qn1BKb1/p1B3p1/Nr2k3/2QN2pr/2Pp4/b7/8/5R2 w - - 0 1)

Sheppard, Charles William

American Chess Bulletin, 1941

1qn1BKb1/p1B3p1/Nr2k3/2QN2pr/2Pp4/b7/8/5R2

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc7
      • 2.Sdxc7#
    • 1...Bxc5+
      • 2.Sxc5#
    • 1...g6
      • 2.Rf6#
  • Keys
    • 1.Sf6!
      • threat
        • 2.Bd7#
      • 1...Bxc5+
        • 2.Sxc5#
      • 1...Qxc7
        • 2.Sxc7#
      • 1...gxf6
        • 2.Re1#
      • 1...Rd6
        • 2.Qf5#
      • 1...Sd6
        • 2.Qd5#
      • 1...Se7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(i);XB(F)::S(D),XQ(i)
    • B(a);CHECK,XQ(C)::S(E),XB(a)
    • P(h);N_GUARD::R1(A)
  • Actual
    • S(D);
    • Threat
      • B(G)
    • Vars
      • B(a);CHECK,XQ(C)::S(E),XB(a)
      • Q(i);XB(F)::S(E),XQ(i)
      • P(h);SBLOCK,XS(D)::R(A)
      • R(e);N_PINQ(C)::QAB1(C)
      • S(j);N_PINQ(C),P_PINB(G)::QAB1(C)
      • S(j);N_PINQ(C),P_PINB(G)::QAR1(C)
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