MESON Chess Problem Database

Problem Display
PID: 52335 (B4Q2/1N6/1p4p1/1P1n2P1/R2Pk3/1K2P2P/5nN1/5R2 w - - 0 1)

Shannon, J

Chess Amateur (The), 1908

B4Q2/1N6/1p4p1/1P1n2P1/R2Pk3/1K2P2P/5nN1/5R2

#2

12 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Sd6#
      • 2.Qf3#
    • 1...Sc3
      • 2.Sc5#
    • 1...Sxe3
      • 2.Sc5#
    • 1...Sb4
      • 2.Sc5#
    • 1...Sf4
      • 2.Sc5#
    • 1...Sc7
      • 2.Sc5#
    • 1...Se7
      • 2.Sc5#
  • Tries
    • 1.Rxf2?
      • 1...Sxe3
        • 2.Sc5#
      • 1...Sc3
        • 2.Sc5#
      • 1...Sb4
        • 2.Sc5#
      • 1...Sf4
        • 2.Sc5#
      • 1...Sf6
        • 2.Sc5#
      • 1...Sc7
        • 2.Sc5#
      • 1...Se7
        • 2.Sc5#
      • 1...Kd3!
    • 1.Qxf2?
      • threat
        • 2.Qc2#
      • 1...Kd3
        • 2.Qc2#
      • 1...Sxe3
        • 2.Sc5#
      • 1...Sc3
        • 2.Sc5#
      • 1...Sb4
        • 2.Sc5#
      • 1...Sf6
        • 2.Sc5#
      • 1...Sc7
        • 2.Sc5#
      • 1...Se7
        • 2.Sc5#
      • 1...Sf4!
  • Keys
    • 1.Qc8!
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Qg4#
      • 1...Sxh3
        • 2.Qc2#
      • 1...Sxe3
        • 2.Sc5#
      • 1...Sc3
        • 2.Sc5#
      • 1...Sb4
        • 2.Sc5#
      • 1...Sf4
        • 2.Sc5#
      • 1...Sf6
        • 2.Sc5#
      • 1...Sc7
        • 2.Sc5#
      • 1...Se7
        • 2.Sc5#
      • 1...Sd1
        • 2.Qc2#
      • 1...Sh1
        • 2.Qc2#
      • 1...Sd3
        • 2.Sd6#
      • 1...Sg4
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(c);::B(K)+S(J),DCHECK
    • S(c);XP(D)::B(K)+S(J),DCHECK
  • Tries
    • Try
      • R(A);XS(a)
      • Vars
        • S(c);XP(D)::B(K)+S(J),DCHECK
        • S(c);::B(K)+S(J),DCHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(L);XS(a)
      • Threat
        • QAB(L)
      • Vars
        • K(b);S_FLIGHT::QAB1(L)
        • S(c);XP(D)::B(K)+S(J),DCHECK
        • S(c);::B(K)+S(J),DCHECK
      • Refutation
        • S(c);
  • Actual
    • Q(L);
    • Vars
      • K(b);S_FLIGHT::QAB1(L)
      • K(b);P_SPINS(a),S_FLIGHT::QAB1(L)
      • S(a);N_GUARD,XP(E)::QAB(L)
      • S(c);XP(D)::B(K)+S(J),DCHECK
      • S(c);::B(K)+S(J),DCHECK
      • S(a);N_GUARD::QAB(L)
      • S(a);SBLOCK::S(J)
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