MESON Chess Problem Database

Problem Display
PID: 122763 (4K3/4p2p/3P2nR/QN2k3/1N4PP/5P2/1P3B2/3B4 w - - 0 1)

Baird, Edith Elina Helen (Mrs WJ)

Source?, 0000

4K3/4p2p/3P2nR/QN2k3/1N4PP/5P2/1P3B2/3B4

#2

12 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Sd3#
    • 1...Sf4
      • 2.Bd4#
    • 1...Sxh4
      • 2.Bg3#
    • 1...Sf8
      • 2.Bg3#
    • 1...Sh8
      • 2.Bg3#
  • Tries
    • 1.Sc7+?
      • 1...Kf4
        • 2.Sd3#
        • 2.Se6#
        • 2.Qf5#
        • 2.Qg5#
      • 1...Kxd6
        • 2.Qc5#
      • 1...Kf6!
    • 1.Bd4+?
      • 1...Ke6
        • 2.Bb3#
        • 2.Qa2#
      • 1...Kf4!
    • 1.Rxg6?
      • threat
        • 2.Bg3#
      • 1...Kf4
        • 2.Sd3#
      • 1...hxg6!
    • 1.Qc7?
      • 1...Kf4
        • 2.Sd3#
      • 1...Ke6
        • 2.Qxe7#
      • 1...Kf6
        • 2.Qxe7#
      • 1...Sxh4
        • 2.Bg3#
        • 2.dxe7#
        • 2.d7#
      • 1...exd6
        • 2.Qxd6#
      • 1...Sf4
        • 2.Bd4#
        • 2.Qc3#
        • 2.dxe7#
        • 2.d7#
      • 1...Sf8
        • 2.Bg3#
        • 2.dxe7#
        • 2.d7#
      • 1...Sh8
        • 2.Bg3#
        • 2.dxe7#
        • 2.d7#
      • 1...e6!
    • 1.Qa7?
      • 1...Kf4
        • 2.Sd3#
        • 2.Qe3#
        • 2.Qd4#
      • 1...Ke6
        • 2.Qxe7#
      • 1...Kf6
        • 2.Qxe7#
      • 1...Sxh4
        • 2.Bg3#
        • 2.Qe3#
        • 2.Qd4#
      • 1...Sf4
        • 2.Bd4#
        • 2.Qe3#
        • 2.Qd4#
      • 1...Sf8
        • 2.Bg3#
        • 2.Qe3#
        • 2.Qd4#
      • 1...Sh8
        • 2.Bg3#
        • 2.Qe3#
        • 2.Qd4#
      • 1...e6
        • 2.Qd4#
      • 1...exd6!
  • Keys
    • 1.Qd8!
      • 1...Kf4
        • 2.Sd3#
      • 1...Ke6
        • 2.Qxe7#
      • 1...Kf6
        • 2.Qxe7#
      • 1...Sxh4
        • 2.Bg3#
      • 1...exd6
        • 2.Qxd6#
      • 1...Sf4
        • 2.Bd4#
      • 1...Sf8
        • 2.Bg3#
      • 1...Sh8
        • 2.Bg3#
      • 1...e6
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::S(E)
    • S(b);SBLOCK::B(C)
    • S(b);N_GUARD,XP(G)::B(C)
    • S(b);N_GUARD::B(C)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(a);P_SPINS(b),S_FLIGHT,XP(J)::QAB1(H)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • B(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(K);XS(b)
      • Threat
        • B(C)
      • Vars
        • K(a);S_FLIGHT::S(E)
      • Refutation
        • P(d);XR(K)
    • Try
      • Q(H);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);P-FLIGHT,P_SPINS(b)::QAR1(H),XP(c)
        • K(a);P_SPINS(b),S_FLIGHT::QAB1(H),XP(c)
        • P(c);OGATE,P_SPINP(c),XP(J)::QAB1(H),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(H);
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::QAR1(H),XP(c)
        • K(a);P_SPINS(b),S_FLIGHT::QAB1(H),XP(c)
        • P(c);SBLOCK::QAB1(H)
      • Refutation
        • P(c);XP(J)
  • Actual
    • Q(H);
    • Vars
      • K(a);S_FLIGHT::S(E)
      • K(a);P-FLIGHT,P_SPINS(b)::QAR1(H),XP(c)
      • K(a);P_SPINP(c),P_SPINS(b),S_FLIGHT::QAB1(H),XP(c)
      • S(b);N_GUARD,XP(G)::B(C)
      • P(c);OGATE,XP(J)::QAB1(H),XP(c)
      • S(b);SBLOCK::B(C)
      • S(b);N_GUARD::B(C)
      • P(c);OGATE,SBLOCK::QAR2(H)
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