MESON Chess Problem Database

Problem Display
PID: 53759 (2Q1N1b1/R1KPr1pP/P3kNqR/5p2/5B2/5n2/1p4B1/8 w - - 0 1)

McClelland, David C

The Chess Review, 1935

2Q1N1b1/R1KPr1pP/P3kNqR/5p2/5B2/5n2/1p4B1/8

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kf7
      • 2.hxg8Q#
    • 1...Rxd7+
      • 2.Qxd7#
    • 1...Se1
      • 2.Bd5#
    • 1...Sg1
      • 2.Bd5#
    • 1...Sd2
      • 2.Bd5#
    • 1...Sh2
      • 2.Bd5#
    • 1...Sd4
      • 2.Bd5#
    • 1...Sh4
      • 2.Bd5#
    • 1...Se5
      • 2.Bd5#
    • 1...Sg5
      • 2.Bd5#
  • Tries
    • 1.hxg8Q+?
      • 1...Qf7
        • 2.Sxg7#
      • 1...Rf7!
    • 1.hxg8B+?
      • 1...Qf7
        • 2.Sxg7#
      • 1...Rf7!
  • Keys
    • 1.Kd8!
      • threat
        • 2.Qc4#
      • 1...Qxe8+
        • 2.dxe8Q#
      • 1...Rxd7+
        • 2.Qxd7#
      • 1...Rxe8+
        • 2.dxe8S#
      • 1...Kf7
        • 2.hxg8Q#
      • 1...Sd2
        • 2.Bd5#
      • 1...Se5
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • K(d);S_FLIGHT::PXB(h)=Q
    • R(f);CHECK,OGATE,P_SPINR(f),XP(H)::QAB1(J),XR(f)
    • S(b);OGATE::B(A)
  • Tries
    • Try
      • P(I);CHECK,XB(h)
      • Vars
        • Q(e);P_SPINQ(e)::S(K),XP(g)
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • P(I);CHECK,XB(h)
      • Vars
        • Q(e);P_SPINQ(e)::S(K),XP(g)
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • K(G);N_SPINP(H),S_FLIGHT
    • Threat
      • QAB(J)
    • Vars
      • Q(e);CHECK,OGATE,XS(K)::PXQ(e)=Q
      • R(f);CHECK,OGATE,P_SPINR(f),XP(H)::QAB1(J),XR(f)
      • R(f);CHECK,OGATE,XS(K)::PXR(f)=S
      • K(d);S_FLIGHT::PXB(h)=Q
      • S(b);OGATE::B(A)
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