MESON Chess Problem Database

Problem Display
PID: 162477 (5BB1/5q2/K1N2p2/nQpkpR2/5n2/8/3N4/5rb1 w - - 0 1)

Watney, Charles Gold

The Observer, 1924

(First published on Sun Jul 27 1924)

5BB1/5q2/K1N2p2/nQpkpR2/5n2/8/3N4/5rb1

#2

7 + 9

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Bxf7#
    • 1...Sg2
      • 2.Bxf7#
    • 1...Sd3
      • 2.Bxf7#
    • 1...Sh3
      • 2.Bxf7#
    • 1...Sh5
      • 2.Bxf7#
    • 1...Sg6
      • 2.Bxf7#
    • 1...Sxc6
      • 2.Qc4#
  • Tries
    • 1.Sb4+?
      • 1...Kd4
        • 2.Qxc5#
      • 1...Ke6!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Qd7#
      • 1...Qe6+
        • 2.Sc6#
      • 1...Kd4
        • 2.Qxc5#
      • 1...Ke6
        • 2.Qd7#
      • 1...Se6
        • 2.Sef3#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Qc4#
      • 1...Sb7
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • S(c);N_GUARD::B(G),XQ(i)
    • S(d);N_GUARD,SBLOCK,XS(E)::QAB1(B)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(f);N_SPINP(e),N_SPINQ(i),P-FLIGHT::QAB1(B),XP(e)
      • Refutation
        • K(f);N_SPINP(e),S_FLIGHT
  • Actual
    • S(E);XP(g)
    • Threat
      • QAR2(B)
    • Vars
      • Q(i);CHECK::R(C)+S(E)
      • K(f);N_SPINP(e),N_SPINQ(i),P-FLIGHT::QAB1(B),XP(e)
      • K(f);N_SPINP(e),S_FLIGHT::QAB1(B)
      • S(c);N_SPINQ(i),SBLOCK::R(C)+S(E)
      • S(d);N_GUARD::QAB1(B),XS(d)
      • S(d);N_GUARD::QAB1(B)
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