MESON Chess Problem Database

Problem Display
PID: 15161 (Br4R1/1P2q3/6N1/1Q6/2Pp1B1P/3PP3/1p3Pk1/1K1R2Nb w - - 0 1)

McWilliam, Robert C

Schiffs with Everything, 1980

Br4R1/1P2q3/6N1/1Q6/2Pp1B1P/3PP3/1p3Pk1/1K1R2Nb

#2

14 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf2
      • 2.Qxb2#
  • Tries
    • 1.Sxe7+?
      • 1...Kxf2
        • 2.Qxb2#
      • 1...Rxg8!
    • 1.Qg5+?
      • 1...Kxf2
        • 2.Qg3#
      • 1...Qxg5!
  • Keys
    • 1.Qxb2!
      • threat
        • 2.f3#
      • 1...Qxh4
        • 2.Sxh4#
      • 1...Qxe3
        • 2.fxe3#
      • 1...Qxb7
        • 2.Sf8#
      • 1...Rxb7
        • 2.Sxe7#
      • 1...dxe3
        • 2.fxe3#
      • 1...Qa3
        • 2.Sf8#
      • 1...Qb4
        • 2.Sf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(c);OGATEB,P-FLIGHT,XP(D)::QAR(J),XP(b)
  • Tries
    • Try
      • S(K);CHECK,XQ(e)
      • Vars
        • K(c);P-FLIGHT,XP(D)::QAR(J),XP(b)
      • Refutation
        • R(f);XR(N)
    • Try
      • Q(J);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(D)::QAB1(J)
      • Refutation
        • Q(e);XQ(J)
  • Actual
    • Q(J);XP(b)
    • Threat
      • QAR(J)+P(D)
    • Vars
      • Q(e);XP(I)::R(N)+S(K),DCHECK,XQ(e)
      • Q(e);OGATE,XP(F)::QAR(J)+P(D),XQ(e)
      • Q(e);N_GUARD,P_PINQ(J),P_SPINQ(e),XP(L)::R(N)+S(K)
      • R(f);N_GUARD,P_PINQ(J),P_SPINR(f),XP(L)::R(N)+S(K),XQ(e)
      • P(d);OGATE,XP(F)::QAR(J)+P(D),XP(d)
      • Q(e);N_GUARD::R(N)+S(K)
      • Q(e);N_GUARD,P_PINQ(J)::R(N)+S(K)
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Developed and maintained by Brian Stephenson.
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