MESON Chess Problem Database

Problem Display
PID: 258276 (2Q5/b3N3/r2k1Kp1/8/3p4/2PP4/8/8 w - - 0 1)

Anonymous

English Mechanic and World of Science, 1891

(First published on Fri Feb 6 1891)

2Q5/b3N3/r2k1Kp1/8/3p4/2PP4/8/8

#2

5 + 5

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qc6#
    • 1...Ra2
      • 2.Qc6#
    • 1...Ra3
      • 2.Qc6#
    • 1...Ra4
      • 2.Qc6#
    • 1...Ra5
      • 2.Qc6#
    • 1...Rc6
      • 2.Qxc6#
    • 1...Bc5
      • 2.Qd8#
    • 1...Bb6
      • 2.Qc6#
  • Tries
    • 1.cxd4?
      • threat
        • 2.Qd8#
      • 1...Bb6
        • 2.Qc6#
      • 1...Bxd4+!
  • Keys
    • 1.c4!
      • 1...Rc6
        • 2.Qxc6#
      • 1...Ra1
        • 2.Qc6#
      • 1...Ra2
        • 2.Qc6#
      • 1...Ra3
        • 2.Qc6#
      • 1...Ra4
        • 2.Qc6#
      • 1...Ra5
        • 2.Qc6#
      • 1...Rb6
        • 2.c5#
      • 1...Bc5
        • 2.Qd8#
      • 1...Bb6
        • 2.Qc6#
      • 1...Bb8
        • 2.c5#
      • 1...g5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD::QAR1(E)
    • R(b);N_GUARD::QAR1(E),XR(b)
    • B(e);SBLOCK::QAR2(E)
    • B(e);S_CUTR(b)::QAR1(E)
  • Tries
    • Try
      • P(A);XP(a)
      • Threat
        • QAR2(E)
      • Vars
        • B(e);S_CUTR(b)::QAR1(E)
      • Refutation
        • B(e);CHECK,XP(A)
  • Actual
    • P(A);
    • Vars
      • R(b);N_GUARD::QAR1(E),XR(b)
      • R(b);N_GUARD::QAR1(E)
      • R(b);S_CUTB(e)::P(A)
      • B(e);SBLOCK::QAR2(E)
      • B(e);S_CUTR(b)::QAR1(E)
      • B(e);N_GUARD::P(A)
      • P(d);N_GUARD::S(D)
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