MESON Chess Problem Database

Problem Display
PID: 247460 (Q2Nb3/B7/r1n4K/rn3RP1/4kpP1/7p/2N1P3/1Bq5 w - - 0 1)

Bennett, Frederick

British Chess Magazine, 1931

Q2Nb3/B7/r1n4K/rn3RP1/4kpP1/7p/2N1P3/1Bq5

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sxa3#
    • 1...Qe3
      • 2.Sxe3#
    • 1...Qe1
      • 2.Sxe1#
    • 1...Qf1
      • 2.Se1#
    • 1...Qg1
      • 2.Se1#
    • 1...Qh1
      • 2.Se1#
    • 1...Qxc2
      • 2.Bxc2#
  • Tries
    • 1.Sa1+?
      • 1...Qc2
        • 2.Bxc2#
      • 1...Qxb1!
    • 1.Se1+?
      • 1...Qc2
        • 2.Bxc2#
      • 1...Qxb1!
    • 1.Sa3+?
      • 1...Qc2
        • 2.Bxc2#
      • 1...Qxb1!
    • 1.Se3+?
      • 1...Qc2
        • 2.Bxc2#
      • 1...Qxb1!
    • 1.Sb4+?
      • 1...Qc2
        • 2.Bxc2#
      • 1...Qxb1!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Sc5#
      • 1...Sb4+
        • 2.Sd6#
      • 1...Scd4+
        • 2.Sd6#
      • 1...Se5+
        • 2.Sd6#
      • 1...Scxa7+
        • 2.Sd6#
      • 1...Se7+
        • 2.Sd6#
      • 1...Sb8+
        • 2.Sd6#
      • 1...Sd8+
        • 2.Sd6#
      • 1...Qxc2
        • 2.Bxc2#
      • 1...Sbxa7
        • 2.Sd6#
      • 1...Qa3
        • 2.Sxa3#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Qg1
        • 2.Se1#
      • 1...Sa3
        • 2.Sd6#
      • 1...Sc3
        • 2.Sd6#
      • 1...Sbd4
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sc7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::B(A)+S(B),XQ(a)
    • Q(a);N_GUARD::B(A)+S(B)
    • Q(a);OGATE,P_SPINQ(a),XS(B)::B(A),XQ(a)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
      • Refutation
        • Q(a);XB(A)
    • Try
      • S(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
      • Refutation
        • Q(a);XB(A)
    • Try
      • S(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
      • Refutation
        • Q(a);XB(A)
    • Try
      • S(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
      • Refutation
        • Q(a);XB(A)
    • Try
      • S(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
      • Refutation
        • Q(a);XB(A)
  • Actual
    • S(J);N_PINS(h)
    • Threat
      • S(J)
    • Vars
      • S(h);CHECK::QAB(I)+S(J),DCHECK
      • S(h);CHECK,XB(H)::QAB(I)+S(J),DCHECK
      • Q(a);OGATE,P_SPINQ(a),XS(B)::B(A),XQ(a)
      • S(f);N_GUARD,XB(H)::S(J)
      • Q(a);N_GUARD::B(A)+S(B),XQ(a)
      • Q(a);N_GUARD::B(A)+S(B)
      • S(f);N_GUARD::S(J)
      • S(f);N_GUARD::S(J),XS(f)
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