MESON Chess Problem Database

Problem Display
PID: 258454 (1b2N3/p5p1/P3P1P1/nK1k3N/8/5Pn1/8/B1Q5 w - - 0 1)

Nield, Joshua

English Mechanic and World of Science, 1893

(First published on Thu Feb 16 1893)

1b2N3/p5p1/P3P1P1/nK1k3N/8/5Pn1/8/B1Q5

#2

9 + 6

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Sxf4#
    • 1...Sb3
      • 2.Qc4#
      • 2.Qc6#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sc6
      • 2.Qc4#
      • 2.Qxc6#
    • 1...Sb7
      • 2.Qc4#
      • 2.Qc6#
  • Tries
    • 1.Shxg7?
      • threat
        • 2.Qd2#
        • 2.Qd1#
        • 2.Qc5#
      • 1...Bf4
        • 2.Qc5#
      • 1...Be5
        • 2.Qc5#
      • 1...Bd6
        • 2.Sf6#
        • 2.Qd2#
        • 2.Qd1#
      • 1...Sf1
        • 2.Qc5#
      • 1...Se2
        • 2.Qc5#
      • 1...Sf5
        • 2.Qc5#
      • 1...Sb3
        • 2.Qc4#
        • 2.Qc6#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Qc4#
        • 2.Qc5#
        • 2.Qxc6#
      • 1...Sb7
        • 2.Qd2#
        • 2.Qd1#
        • 2.Qc4#
        • 2.Qc6#
      • 1...Se4!
    • 1.Sc7+?
      • 1...Kd6
        • 2.Qc5#
      • 1...Bxc7!
  • Keys
    • 1.Qf4!
      • 1...Kxe6
        • 2.Qf7#
      • 1...Bxf4
        • 2.Sxf4#
      • 1...Sxh5
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bd6
        • 2.Qxd6#
      • 1...Bc7
        • 2.Sxc7#
      • 1...Sf1
        • 2.Qe4#
      • 1...Sh1
        • 2.Qe4#
      • 1...Se2
        • 2.Qe4#
      • 1...Sf5
        • 2.Qe4#
      • 1...Sb3
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Qc4#
      • 1...Sb7
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • B(f);N_GUARD::S(E),XB(f)
    • S(b);N_GUARD::QAB1(B),XS(b)
  • Tries
    • Try
      • S(E);XP(e)
      • Threat
        • DUALS(3)
      • Vars
        • B(f);::QAR1(B)
        • S(a);::QAR1(B)
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • S(a);
    • Try
      • S(I);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
      • Refutation
        • B(f);XS(I)
  • Actual
    • Q(B);
    • Vars
      • K(c);OGATEB,S_FLIGHT,XP(G)::QAB1(B)
      • B(f);XQ(B)::S(E),XB(f)
      • S(a);N_GUARD,XS(E)::QAB1(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
      • B(f);N_GUARD::QAR1(B),XB(f)
      • B(f);N_GUARD::S(I),XB(f)
      • S(a);N_GUARD::QAB1(B)
      • S(b);N_GUARD::QAB1(B)
      • S(b);N_GUARD::QAB1(B),XS(b)
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