MESON Chess Problem Database

Problem Display
PID: 258505 (8/K3NN2/2pp4/8/1p1k3n/8/2QB4/8 w - - 0 1)

Wood, Henry A

English Mechanic and World of Science, 1893

(First published on Fri Apr 21 1893)

8/K3NN2/2pp4/8/1p1k3n/8/2QB4/8

#2

5 + 5

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Sxc6#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sdxc6#
      • 1...c5
        • 2.Sdc6#
      • 1...Ke5!
    • 1.Qd3+?
      • 1...Kc5
        • 2.Be3#
      • 1...Kxd3!
    • 1.Qe4+?
      • 1...Kc5
        • 2.Qxb4#
      • 1...Kxe4!
    • 1.Qc3+?
      • 1...Ke4
        • 2.Sg5#
        • 2.Sxd6#
        • 2.Qe3#
      • 1...bxc3!
    • 1.Qxc6?
      • threat
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...Kd3!
  • Keys
    • 1.Sg5!
      • 1...Ke5
        • 2.Qb2#
      • 1...Sg2
        • 2.Sf3#
      • 1...Sf3
        • 2.Sxf3#
      • 1...Sf5
        • 2.Sf3#
      • 1...Sg6
        • 2.Sf3#
      • 1...b3
        • 2.Qc3#
      • 1...c5
        • 2.Qe4#
      • 1...d5
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(e);SBLOCK::S(D),XP(d)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E),XP(d)
      • Vars
        • P(d);::S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::B(B)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(A),XP(a)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);XP(d)
      • Threat
        • QAR1(A)
      • Vars
        • P(e);::QAR1(A),XP(e)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(E);
    • Vars
      • K(b);N_GUARD,S_FLIGHT::QAB(A)
      • S(c);N_GUARD::S(E)
      • S(c);N_GUARD::S(E),XS(c)
      • P(a);N_GUARD::QAB1(A)
      • P(d);SBLOCK::QAR1(A)
      • P(e);SBLOCK::S(D),XP(d)
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