MESON Chess Problem Database

Problem Display
PID: 70983 (2N5/3p1K2/8/n1bk4/Q7/1p6/2NPR3/2R2B1b w - - 0 1)

Sheppard, Charles William

Good Companions, 1919

2N5/3p1K2/8/n1bk4/Q7/1p6/2NPR3/2R2B1b

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Bxg2#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bd4
      • 2.Sb4#
    • 1...Sc4
      • 2.Qa8#
    • 1...Sc6
      • 2.Qxb3#
    • 1...d6
      • 2.Se7#
  • Tries
    • 1.Sb6+?
      • 1...Kd6
        • 2.Qxd7#
      • 1...Bxb6!
    • 1.Se7+?
      • 1...Kd6
        • 2.Qf4#
      • 1...Bxe7!
    • 1.Qxd7+?
      • 1...Kc4
        • 2.Ree1#
        • 2.Rf2#
        • 2.Rg2#
        • 2.Rh2#
        • 2.Re3#
        • 2.Re4#
        • 2.Re5#
        • 2.Re6#
        • 2.Re7#
        • 2.Re8#
      • 1...Bd6!
    • 1.Qd4+?
      • 1...Bxd4
        • 2.Sb4#
      • 1...Kc6!
  • Keys
    • 1.d4!
      • threat
        • 2.Re5#
      • 1...Bxd4
        • 2.Sb4#
      • 1...Be4
        • 2.Se3#
      • 1...Bd6
        • 2.Sb6#
      • 1...Sc4
        • 2.Qa8#
      • 1...Sc6
        • 2.Qxb3#
      • 1...d6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::B(B),XB(a)
    • B(a);N_GUARD::QAB1(F),XB(a)
    • B(d);N_GUARD,SBLOCK::S(C)
    • S(c);OGATE,SBLOCK::QAB(F)
    • S(c);N_GUARD,SBLOCK::QAB(F),XP(b)
    • P(f);SBLOCK,S_CUTB(d)::S(H)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(F),XP(f)
      • Refutation
        • B(d);XS(H)
    • Try
      • S(H);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB(F)
      • Refutation
        • B(d);XS(H)
    • Try
      • Q(F);CHECK,XP(f)
      • Refutation
        • B(d);P_SPINB(d)
    • Try
      • Q(F);CHECK
      • Vars
        • B(d);SBLOCK,XQ(F)::S(C)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • P(D);
    • Threat
      • R1(E)
    • Vars
      • B(d);N_GUARD,SBLOCK,XP(D)::S(C)
      • B(a);SBLOCK::S(C)
      • B(d);N_GUARD,SBLOCK::S(H)
      • S(c);OGATE,SBLOCK::QAB(F)
      • S(c);N_GUARD,SBLOCK::QAB(F),XP(b)
      • P(f);SBLOCK,S_CUTB(d)::S(H)
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