MESON Chess Problem Database

Problem Display
PID: 154335 (2Bq1N2/8/2P2R1P/4k3/5N2/3p1P2/3P1Q1B/7K w - - 0 1)

Markwick, Frederick W

Stratford Express, 1911

2Bq1N2/8/2P2R1P/4k3/5N2/3p1P2/3P1Q1B/7K

#2

11 + 3

15351 SCPF/BCPS Black Books 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Sd7#
    • 1...Qb6
      • 2.Sd7#
    • 1...Qxf6
      • 2.Qc5#
    • 1...Qd5
      • 2.Sh5#
    • 1...Qd6
      • 2.Rf5#
    • 1...Qd7
      • 2.Sxd7#
  • Tries
    • 1.Se2+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kxf6!
    • 1.Sxd3+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kxf6!
    • 1.S4e6+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kxf6!
    • 1.Qc5+?
      • 1...Qd5
        • 2.Sxd5#
        • 2.Sh5#
        • 2.Sd7#
        • 2.Rf5#
      • 1...Kxf6!
    • 1.Qa7?
      • 1...Kxf6
        • 2.Qg7#
      • 1...Qxf6
        • 2.Qc5#
      • 1...Qxc8
        • 2.Qa1#
      • 1...Qxf8
        • 2.Qa1#
      • 1...Qa5
        • 2.Sd7#
      • 1...Qc7
        • 2.Qa1#
      • 1...Qe7
        • 2.Qa1#
      • 1...Qd4
        • 2.Qe7#
      • 1...Qd5
        • 2.Sh5#
      • 1...Qd6
        • 2.Rf5#
      • 1...Qd7
        • 2.Sxd7#
      • 1...Qe8
        • 2.Qa1#
      • 1...Qb6!
  • Keys
    • 1.Qg1!
      • 1...Kxf6
        • 2.Qg7#
      • 1...Qxf6
        • 2.Qc5#
      • 1...Qxc8
        • 2.Qa1#
      • 1...Qxf8
        • 2.Qa1#
      • 1...Qb6
        • 2.Sd7#
      • 1...Qa5
        • 2.Sd7#
      • 1...Qc7
        • 2.Qa1#
      • 1...Qe7
        • 2.Qa1#
      • 1...Qd4
        • 2.Qg5#
      • 1...Qd5
        • 2.Sh5#
      • 1...Qd6
        • 2.Rf5#
      • 1...Qd7
        • 2.Sxd7#
      • 1...Qe8
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD::S(K)
    • Q(c);N_GUARD,SBLOCK,XR(H)::QAR2(C)
    • Q(c);P_PINP(E),SBLOCK::B(D)+S(F)
    • Q(c);SBLOCK::R1(H)
    • Q(c);N_GUARD::S(K),XQ(c)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT,XR(H)
    • Try
      • S(F);CHECK,XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT,XR(H)
    • Try
      • S(F);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT,XR(H)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(b);S_FLIGHT,XR(H)
    • Try
      • Q(C);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(H)::QAB1(C)
        • Q(c);N_GUARD,SBLOCK,XR(H)::QAR2(C)
        • Q(c);N_GUARD,XB(J)::QAB(C)
        • Q(c);N_GUARD,XS(K)::QAB(C)
        • Q(c);N_GUARD::S(K)
        • Q(c);N_GUARD::QAB(C)
        • Q(c);N_GUARD,SBLOCK::QAR2(C)
        • Q(c);P_PINP(E),SBLOCK::B(D)+S(F)
        • Q(c);SBLOCK::R1(H)
        • Q(c);N_GUARD::S(K),XQ(c)
      • Refutation
        • Q(c);
  • Actual
    • Q(C);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(H)::QAB1(C)
      • Q(c);N_GUARD,SBLOCK,XR(H)::QAR2(C)
      • Q(c);N_GUARD,XB(J)::QAB(C)
      • Q(c);N_GUARD,XS(K)::QAB(C)
      • Q(c);N_GUARD::S(K)
      • Q(c);N_GUARD::QAB(C)
      • Q(c);SBLOCK::QAR2(C)
      • Q(c);P_PINP(E),SBLOCK::B(D)+S(F)
      • Q(c);SBLOCK::R1(H)
      • Q(c);N_GUARD::S(K),XQ(c)
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