MESON Chess Problem Database

Problem Display
PID: 232663 (8/4Q3/1N2p3/4pN2/1P1nkn1P/4P3/3RBR2/1K6 w - - 0 1)

Jackson, Harry S

English Mechanic and World of Science, 1880

(First published on Fri Aug 27 1880)

8/4Q3/1N2p3/4pN2/1P1nkn1P/4P3/3RBR2/1K6

#2

10 + 5

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg2
      • 2.Bd3#
    • 1...Sd3
      • 2.Bxd3#
    • 1...Sh3
      • 2.Bd3#
    • 1...Sd5
      • 2.Bd3#
    • 1...Sh5
      • 2.Bd3#
    • 1...Sg6
      • 2.Bd3#
  • Tries
    • 1.Bf3+?
      • 1...Kxf5
        • 2.Qg5#
        • 2.Qf7#
      • 1...Sxf3!
    • 1.Rxd4+?
      • 1...Kxf5
        • 2.Qg5#
        • 2.Qf7#
      • 1...exd4!
  • Keys
    • 1.Sd5!
      • 1...Kxd5
        • 2.Qb7#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Sdxe2
        • 2.Sd6#
      • 1...Sxf5
        • 2.Bf3#
      • 1...Sfxe2
        • 2.Sf6#
      • 1...Sxd5
        • 2.Bd3#
      • 1...exd5
        • 2.Rxf4#
      • 1...exf5
        • 2.Rxd4#
      • 1...Sc2
        • 2.Sg3#
        • 2.Sd6#
      • 1...Sb3
        • 2.Sg3#
        • 2.Sd6#
      • 1...Sf3
        • 2.Sg3#
        • 2.Sd6#
      • 1...Sb5
        • 2.Sg3#
      • 1...Sc6
        • 2.Sg3#
        • 2.Sd6#
      • 1...Sg2
        • 2.Sc3#
        • 2.Sf6#
      • 1...Sd3
        • 2.Sc3#
        • 2.Sf6#
      • 1...Sh3
        • 2.Sc3#
        • 2.Sf6#
      • 1...Sh5
        • 2.Sc3#
      • 1...Sg6
        • 2.Sc3#
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::B(C)
    • S(c);N_GUARD::B(C),XS(c)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • S(a);XB(C)
    • Try
      • R(B);CHECK,XS(a)
      • Refutation
        • P(d);P_SPINP(e),XR(B)
  • Actual
    • S(I);
    • Vars
      • K(b);OGATEB,P_SPINS(a),S_FLIGHT,XS(I)::QAB(J)
      • K(b);OGATEB,P_SPINS(c),S_FLIGHT,XS(H)::QAB(J)
      • S(a);XB(C)::S(H)
      • S(a);N_GUARD,SBLOCK,XS(H)::B(C)
      • S(c);XB(C)::S(I)
      • S(c);N_GUARD,SBLOCK,XS(I)::B(C)
      • P(e);P_SPINP(d),SBLOCK,XS(I)::R1(D),XS(c)
      • P(e);P_SPINP(d),SBLOCK,XS(H)::R1(B),XS(a)
      • S(a);::S(H)
      • S(c);::S(I)
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