MESON Chess Problem Database

Problem Display
PID: 108383 (7K/1N4R1/8/4k3/3N2nR/B3n3/B3Q3/8 w - - 0 1)

Hamilton, Charles Dingee Pennock

American Chess Bulletin, 1908

7K/1N4R1/8/4k3/3N2nR/B3n3/B3Q3/8

#2

8 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Bd6#
      • 2.Rg5#
      • 2.Re7#
      • 2.Qh2#
  • Tries
    • 1.Rh5+?
      • 1...Ke4
        • 2.Rxg4#
      • 1...Kf4
        • 2.Qf3#
      • 1...Kf6
        • 2.Be7#
        • 2.Qa6#
      • 1...Kxd4!
    • 1.Re7+?
      • 1...Kxd4
        • 2.Bb2#
        • 2.Qd2#
        • 2.Qxe3#
      • 1...Kf4
        • 2.Qxe3#
      • 1...Kf6!
    • 1.Qxg4?
      • threat
        • 2.Qe6#
        • 2.Qf4#
      • 1...Kf6
        • 2.Qe6#
        • 2.Qg5#
      • 1...Sc4
        • 2.Qf5#
        • 2.Qe6#
        • 2.Qg5#
      • 1...Sg2
        • 2.Qf5#
        • 2.Qe6#
        • 2.Qg5#
      • 1...Sd5
        • 2.Qf5#
        • 2.Qe6#
        • 2.Qg5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sxg4!
    • 1.Qxe3+?
      • 1...Kf6
        • 2.Be7#
        • 2.Qf4#
        • 2.Qg5#
        • 2.Qe6#
        • 2.Qe7#
      • 1...Sxe3!
  • Keys
    • 1.Sc5!
      • 1...Kxd4
        • 2.Qb2#
      • 1...Kf4
        • 2.Qh2#
      • 1...Kd6
        • 2.Sd3#
      • 1...Kf6
        • 2.Sd7#
      • 1...Sf2
        • 2.Sd7#
      • 1...Sh2
        • 2.Sd7#
      • 1...Sf6
        • 2.Sd3#
        • 2.Qh2#
      • 1...Sh6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(c);P-FLIGHT::R(G),XS(b)
        • K(c);N_SPINS(a),S_FLIGHT::QAR1(B)
      • Refutation
        • K(c);N_SPINS(a),S_FLIGHT,XS(D)
    • Try
      • R(G);CHECK
      • Vars
        • K(c);N_SPINS(a),P_SPINS(b),S_FLIGHT::QAB1(B),XS(a)
      • Refutation
        • K(c);N_SPINS(a),S_FLIGHT
    • Try
      • Q(B);N_PINS(a),XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);CHECK,XS(a)
      • Refutation
        • S(b);XQ(B)
  • Actual
    • S(F);
    • Vars
      • K(c);N_SPINS(a),OGATEB,P_SPINS(b),S_FLIGHT,XS(D)::QAB(B)
      • K(c);N_SPINS(a),P_SPINS(b),S_FLIGHT::QAB(B)
      • K(c);N_SPINS(a),S_FLIGHT::B(C)+S(F)
      • K(c);N_SPINS(a),S_FLIGHT::S(F)
      • S(b);::S(F)
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