MESON Chess Problem Database

Problem Display
PID: 43238 (8/2PK4/3B1pQ1/3k4/2p5/4P3/r7/b6b w - - 0 1)

Coultaus, Joseph A

Lissner, Morris

Tidskrift for Schack, 1907

8/2PK4/3B1pQ1/3k4/2p5/4P3/r7/b6b

#2

5 + 6

14689 A Memorial to D. J. Densmore 1920
145 StrateGems 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Qf5#
    • 1...Be4
      • 2.Qf7#
      • 2.Qg8#
    • 1...c3
      • 2.Qd3#
    • 1...f5
      • 2.Qe6#
  • Tries
    • 1.Qd3+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...cxd3!
    • 1.c8Q?
      • threat
        • 2.Qb7#
        • 2.Qc5#
        • 2.Qc6#
        • 2.Qcg8#
      • 1...f5
        • 2.Qb7#
        • 2.Qe6#
        • 2.Qc6#
      • 1...Rb2
        • 2.Qf5#
        • 2.Qc5#
        • 2.Qc6#
        • 2.Qcg8#
      • 1...Ra5
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qcg8#
      • 1...Ra6
        • 2.Qc5#
        • 2.Qcg8#
      • 1...Ra8
        • 2.Qb7#
        • 2.Qc5#
        • 2.Qc6#
        • 2.Qxa8#
      • 1...Bd4
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qcg8#
      • 1...c3
        • 2.Qd3#
        • 2.Qf5#
        • 2.Qc5#
        • 2.Qc6#
        • 2.Qcg8#
      • 1...Ra7+!
    • 1.c8S?
      • threat
        • 2.Sb6#
        • 2.Se7#
      • 1...c3
        • 2.Sb6#
        • 2.Qd3#
      • 1...f5
        • 2.Qe6#
      • 1...Rb2
        • 2.Se7#
        • 2.Qf5#
      • 1...Ra6
        • 2.Se7#
      • 1...Bd4
        • 2.Se7#
      • 1...Ra7+!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qb7#
      • 1...c3
        • 2.Qd3#
      • 1...Rb2
        • 2.Qf5#
      • 1...Ra6
        • 2.Qxh1#
      • 1...Ra7
        • 2.Qxh1#
      • 1...Bb2
        • 2.Qxh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(c);S_CUTB(a)::QAR2(C)
    • P(d);N_GUARD,S_CUTB(a)::QAR2(C)
    • P(f);OGATE::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(C),XB(a)
      • Refutation
        • P(d);XQ(C)
    • Try
      • P(D);
      • Threat
        • DUALS(4)
      • Refutation
        • R(c);CHECK
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);OGATE::QAB1(C)
        • R(c);::S(D)
        • B(a);::S(D)
      • Refutation
        • R(c);CHECK
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • P(d);N_GUARD,S_CUTB(a)::QAR2(C)
      • R(c);S_CUTB(a)::QAR2(C)
      • R(c);N_GUARD::QAB(C),XB(b)
      • R(c);N_GUARD,P_PINP(D)::QAB(C),XB(b)
      • B(a);S_CUTR(c)::QAB(C),XB(b)
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