MESON Chess Problem Database

Problem Display
PID: 258633 (6B1/5p2/6P1/3Np3/4k3/2p2N1K/8/B1nQ4 w - - 0 1)

Fellows, Herbert N

English Mechanic and World of Science, 1902

(First published on Fri Nov 28 1902)

6B1/5p2/6P1/3Np3/4k3/2p2N1K/8/B1nQ4

#2

7 + 5

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Sg5#
  • Tries
    • 1.Qd4+?
      • 1...Kxf3
        • 2.Qe3#
      • 1...Kf5
        • 2.Qg4#
      • 1...exd4!
  • Keys
    • 1.Se1!
      • 1...Kf5
        • 2.Qg4#
      • 1...fxg6
        • 2.Qg4#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sa2
        • 2.Qd3#
      • 1...Se2
        • 2.Qd3#
      • 1...Sb3
        • 2.Qd3#
      • 1...c2
        • 2.Qf3#
      • 1...f5
        • 2.Qa4#
      • 1...f6
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • P(e);SBLOCK::S(C)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);N_GUARD,S_FLIGHT,XS(C)::QAR1(B)
        • K(c);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • P(d);XQ(B)
  • Actual
    • S(C);
    • Vars
      • K(c);N_GUARD,S_FLIGHT::QAB1(B)
      • P(e);XP(F)::QAR2(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(a);N_GUARD::QAB1(B)
      • P(b);::QAB1(B)
      • P(e);SBLOCK::QAR(B)
      • P(e);::QAR2(B)
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