MESON Chess Problem Database

Problem Display
PID: 49668 (8/5n2/7p/R6B/rQ1N3k/R6p/3K4/7n w - - 0 1)

Mansfield, Comins

Brisbane Courier, 1928

8/5n2/7p/R6B/rQ1N3k/R6p/3K4/7n

#2

6 + 6

133 The Problemist Supplement 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa3
      • 2.Se2#
    • 1...Sg3
      • 2.Sf3#
    • 1...Sd8
      • 2.Qe7#
    • 1...Sh8
      • 2.Qe7#
  • Tries
    • 1.Be2?
      • threat
        • 2.Rh5#
      • 1...Rxa5
        • 2.Se6#
      • 1...Se5
        • 2.Qe7#
      • 1...Sg3
        • 2.Sf3#
      • 1...Sg5
        • 2.Sf5#
      • 1...h5
        • 2.Rxh5#
      • 1...Rxa3!
  • Keys
    • 1.Bd1!
      • threat
        • 2.Rh5#
      • 1...Rxa3
        • 2.Se2#
      • 1...Rxa5
        • 2.Se6#
      • 1...Se5
        • 2.Qe7#
      • 1...Sg3
        • 2.Sf3#
      • 1...Sg5
        • 2.Sf5#
      • 1...h5
        • 2.Rxh5#

This is a version of 6221

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(c);N_GUARD,XR(B)::QAR(C)+S(D)
    • S(a);SBLOCK::QAR(C)+S(D),DCHECK
    • S(f);N_GUARD::QAB(C)
  • Tries
    • Try
      • B(F);
      • Threat
        • R1(E)
      • Vars
        • R(c);N_GUARD,XR(E)::QAR(C)+S(D)
        • S(f);N_GUARD::QAB(C)
        • S(a);SBLOCK::QAR(C)+S(D),DCHECK
        • S(f);SBLOCK::QAR(C)+S(D),DCHECK
        • P(e);::R1(E),XP(e)
      • Refutation
        • R(c);XR(B)
  • Actual
    • B(F);
    • Threat
      • R1(E)
    • Vars
      • R(c);N_GUARD,XR(B)::QAR(C)+S(D)
      • R(c);N_GUARD,XR(E)::QAR(C)+S(D)
      • S(f);N_GUARD::QAB(C)
      • S(a);SBLOCK::QAR(C)+S(D),DCHECK
      • S(f);SBLOCK::QAR(C)+S(D),DCHECK
      • P(e);::R1(E),XP(e)
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