MESON Chess Problem Database

Problem Display
PID: 258314 (5K2/8/8/5n1B/8/2B3p1/5k1b/2Q5 w - - 0 1)

Bolus, Andrew

English Mechanic and World of Science, 1891

(First published on Fri Aug 7 1891)

5K2/8/8/5n1B/8/2B3p1/5k1b/2Q5

#2

4 + 4

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...g2
      • 2.Qe1#
  • Tries
    • 1.Qf1+?
      • 1...Ke3
        • 2.Qf3#
      • 1...Kxf1!
  • Keys
    • 1.Qh1!
      • 1...Ke3
        • 2.Qf3#
      • 1...Bg1
        • 2.Qf3#
      • 1...g2
        • 2.Qe1#
      • 1...Se3
        • 2.Be1#
      • 1...Sd4
        • 2.Bxd4#
      • 1...Sh4
        • 2.Bd4#
      • 1...Sd6
        • 2.Bd4#
      • 1...Sh6
        • 2.Bd4#
      • 1...Se7
        • 2.Bd4#
      • 1...Sg7
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAR1(A)
      • B(b);SBLOCK::QAR1(A)
      • P(c);SBLOCK::QAB1(A)
      • S(d);SBLOCK::B(B)
      • S(d);N_GUARD::B(B),XS(d)
      • S(d);N_GUARD::B(B)
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