MESON Chess Problem Database

Problem Display
PID: 224536 (3n1Q2/4N1Pp/2p2B2/5N2/R2pnk2/7P/5P2/K2B1R2 w - - 0 1)

Anonymous

English Mechanic and World of Science, 1887

(First published on Fri Mar 4 1887)

3n1Q2/4N1Pp/2p2B2/5N2/R2pnk2/7P/5P2/K2B1R2

#2

11 + 6

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf2
      • 2.Rxd4#
  • Tries
    • 1.Be5+?
      • 1...Kg5
        • 2.f4#
        • 2.h4#
        • 2.g8Q#
        • 2.g8R#
      • 1...Kxe5!
  • Keys
    • 1.Sxd4!
      • 1...Sxf2
        • 2.Sdf5#
      • 1...Sxf6
        • 2.Sf3#
      • 1...Sd2
        • 2.Se6#
      • 1...Sc3
        • 2.Se6#
      • 1...Sg3
        • 2.Se6#
      • 1...Sc5
        • 2.Se6#
      • 1...Sg5
        • 2.Se6#
      • 1...Sd6
        • 2.Se6#
      • 1...Se6
        • 2.Sxe6#
      • 1...Sb7
        • 2.Se6#
      • 1...Sf7
        • 2.Se6#
      • 1...c5
        • 2.Sd5#
      • 1...h5
        • 2.Sg6#
      • 1...h6
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATEB,P_SPINP(a),P_SPINS(b),XP(D)::R(F),XP(a)
  • Tries
    • Try
      • B(H);CHECK
      • Refutation
        • K(c);S_FLIGHT,XB(H)
  • Actual
    • S(G);XP(a)
    • Vars
      • S(b);P_SPINS(b),XP(D)::R(F)+S(G)
      • S(b);P_SPINS(b),XB(H)::R(F)+S(G)
      • S(b);::R(F)+S(G),DCHECK
      • S(f);N_GUARD::S(G),XS(f)
      • S(f);N_GUARD::S(G)
      • P(d);N_GUARD::S(I)
      • P(e);N_GUARD::S(I)
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