MESON Chess Problem Database

Problem Display
PID: 16980 (4k1K1/nrp5/r2p1P2/Bq2N3/B1N5/Q7/8/3RR3 w - - 0 1)

Holladay, Edgar Dinwiddie

American Chess Bulletin, 1945

4k1K1/nrp5/r2p1P2/Bq2N3/B1N5/Q7/8/3RR3

#2

9 + 7

5862 An ABC of Chess Problems 1970
6232 Holladay Chess Problems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.Sf7#
    • 1...dxe5
      • 2.Qe7#
      • 2.Qf8#
      • 2.f7#
    • 1...d5
      • 2.Qe7#
      • 2.Qf8#
    • 1...c6
      • 2.Sxd6#
  • Keys
    • 1.Qh3!
      • threat
        • 2.Sf7#
      • 1...Kd8
        • 2.Sf7#
      • 1...dxe5
        • 2.Qh5#
      • 1...Rc6
        • 2.Qd7#
      • 1...Sc6
        • 2.Qd7#
      • 1...Sc8
        • 2.Qxc8#
      • 1...d5
        • 2.Sc6#
      • 1...c5
        • 2.Sd7#
      • 1...c6
        • 2.Sxd6#

This is after

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • Q(a);::R(B)+S(G)
    • P(f);N_GUARD,N_SPINQ(a),S_CUTR(b)::S(E),XP(c)
  • Actual
    • Q(C);
    • Threat
      • R(B)+S(G)
    • Vars
      • K(g);N_SPINQ(a),P-FLIGHT,P_SPINP(c)::S(G)
      • P(c);P_SPINP(c),XS(G)::QAB(C)
      • R(b);N_SPINQ(a),S_CUTQ(a)::QAB1(C)
      • S(d);N_SPINQ(a),S_CUTQ(a)::QAB1(C)
      • S(d);N_GUARD::QAR2(C),XS(d)
      • P(c);::R(B)+S(G)
      • P(f);::R(B)+S(G)
      • P(f);N_GUARD,N_SPINQ(a),S_CUTR(b)::S(E),XP(c)
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