MESON Chess Problem Database

Problem Display
PID: 10336 (1B3n2/4pp2/4krn1/KNP2q2/N4p2/3Qb2B/b1P1R3/r7 w - - 0 1)

Sheppard, Charles William

Sheppard Two-Movers, 1963

1B3n2/4pp2/4krn1/KNP2q2/N4p2/3Qb2B/b1P1R3/r7

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Sc7#
  • Tries
    • 1.Bxf4?
      • threat
        • 2.Sc7#
      • 1...Sxf4
        • 2.Rxe3#
      • 1...Bd5!
    • 1.Rxe3+?
      • 1...Se5
        • 2.Sc7#
        • 2.Rxe5#
      • 1...fxe3!
  • Keys
    • 1.c6!
      • threat
        • 2.Sc5#
      • 1...Bb1
        • 2.Qc4#
        • 2.Qb3#
      • 1...Bb3
        • 2.Qxb3#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Bd5
        • 2.Sd4#
      • 1...Se5
        • 2.Sc7#
      • 1...Sd7
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(h);N_SPINB(c),SBLOCK::S(G)
  • Tries
    • Try
      • B(I);XP(d)
      • Threat
        • S(G)
      • Vars
        • S(h);N_GUARD,XB(I)::R(B),XB(c)
      • Refutation
        • B(b);P_PINS(E)
    • Try
      • R(B);CHECK,XB(c)
      • Refutation
        • P(d);XR(B)
  • Actual
    • P(H);P_SPINS(G)
    • Threat
      • S(E)
    • Vars
      • B(b);N_GUARD,N_PINS(G),P_PINS(E)::QAB(C),XB(b)
      • B(b);N_PINS(G),P_PINS(E),SBLOCK::S(G)
      • S(h);N_PINS(G),N_SPINB(c),SBLOCK::S(G)
      • S(k);N_GUARD::QAB1(C),XS(k)
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