MESON Chess Problem Database

Problem Display
PID: 258263 (5B2/1Q6/3pp3/8/2bkB3/6K1/2R2P2/4N3 w - - 0 1)

Anonymous

English Mechanic and World of Science, 1890

(First published on Fri Dec 5 1890)

5B2/1Q6/3pp3/8/2bkB3/6K1/2R2P2/4N3

#2

7 + 4

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Bg7#
    • 1...Bf1
      • 2.Sf3#
    • 1...Ba2
      • 2.Sf3#
    • 1...Bb3
      • 2.Sf3#
    • 1...Bd3
      • 2.Sf3#
    • 1...Bb5
      • 2.Sf3#
    • 1...Ba6
      • 2.Sf3#
  • Tries
    • 1.Bg7+?
      • 1...Kc5
        • 2.Sd3#
      • 1...e5!
    • 1.Rd2+?
      • 1...Kc3
        • 2.Qb2#
      • 1...Kc5
        • 2.Bxd6#
      • 1...Ke5
        • 2.Bg7#
      • 1...Bd3!
    • 1.Rxc4+?
      • 1...Ke5
        • 2.Bg7#
        • 2.Qb2#
        • 2.Qg7#
      • 1...Kxc4!
    • 1.Qb2+?
      • 1...Kc5
        • 2.Sd3#
      • 1...Kxe4!
  • Keys
    • 1.Bd3!
      • 1...Kc5
        • 2.Rxc4#
      • 1...Ke5
        • 2.Bg7#
      • 1...Bxd3
        • 2.Sf3#
      • 1...Ba2
        • 2.Qe4#
      • 1...Bb3
        • 2.Qe4#
      • 1...Bb5
        • 2.Qe4#
      • 1...Bd5
        • 2.Qb2#
      • 1...Ba6
        • 2.Qe4#
      • 1...d5
        • 2.Qb2#
      • 1...e5
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(b);N_GUARD,S_CUTP(d),S_FLIGHT::B(G)
    • B(a);::S(A)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(b);P_SPINB(a),S_CUTP(d),S_FLIGHT::S(A)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • R(B);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB1(F)
        • K(b);N_GUARD,P_SPINP(c),S_CUTB(a),S_FLIGHT::B(G),XP(c)
        • K(b);N_GUARD,S_FLIGHT::B(G)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • R(B);CHECK,XB(a)
      • Refutation
        • K(b);P-FLIGHT,XR(B)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);N_GUARD,P_SPINB(a),P_SPINP(c),S_FLIGHT::S(A)
      • Refutation
        • K(b);P-FLIGHT,XB(E)
  • Actual
    • B(E);
    • Vars
      • K(b);N_GUARD,P_SPINB(a),P_SPINP(c),S_FLIGHT::R1(B),XB(a)
      • K(b);N_GUARD,S_CUTP(d),S_FLIGHT::B(G)
      • B(a);SBLOCK,XB(E)::S(A)
      • B(a);::QAR1(F)
      • B(a);SBLOCK::QAB(F)
      • P(c);SBLOCK::QAB(F)
      • P(d);SBLOCK::R1(B),XB(a)
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