MESON Chess Problem Database

Problem Display
PID: 186187 (7K/7Q/N7/4k3/R1n1N3/7B/2P2P2/8 w - - 0 1)

Wright Wood, S (= Wood, SW)

Chess, 1959

7K/7Q/N7/4k3/R1n1N3/7B/2P2P2/8

#2

8 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qf5#
    • 1...Sb2
      • 2.Qf5#
    • 1...Sd2
      • 2.Qf5#
    • 1...Sa3
      • 2.Qf5#
    • 1...Sa5
      • 2.Qf5#
    • 1...Sb6
      • 2.Qf5#
  • Tries
    • 1.Sf6?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd6
        • 2.Qc7#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Sb2
        • 2.Qe7#
      • 1...Sd2
        • 2.Qe7#
      • 1...Sa3
        • 2.Qe7#
      • 1...Se3
        • 2.Qe7#
      • 1...Sa5
        • 2.Qe7#
      • 1...Sb6
        • 2.Qe7#
      • 1...Sd6
        • 2.Qe7#
      • 1...Kd4!
    • 1.Rxc4?
      • threat
        • 2.Qf5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd5!
    • 1.Qh5+?
      • 1...Kxe4
        • 2.Rxc4#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd4!
    • 1.Qd7?
      • 1...Kf4
        • 2.Qf5#
      • 1...Sb2
        • 2.Qf5#
        • 2.Qd6#
      • 1...Sd2
        • 2.Qf5#
        • 2.Qd6#
      • 1...Sa3
        • 2.Qf5#
        • 2.Qd6#
      • 1...Se3
        • 2.Qd6#
      • 1...Sa5
        • 2.Qf5#
        • 2.Qd6#
      • 1...Sb6
        • 2.Qf5#
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Kxe4!
  • Keys
    • 1.Sc3!
      • 1...Kd4
        • 2.Qg7#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd6
        • 2.Qc7#
      • 1...Kf6
        • 2.Qg7#
      • 1...Sb2
        • 2.Qe7#
      • 1...Sd2
        • 2.Qe7#
      • 1...Sa3
        • 2.Qe7#
      • 1...Se3
        • 2.Qe7#
      • 1...Sa5
        • 2.Qe7#
      • 1...Sb6
        • 2.Qe7#
      • 1...Sd6
        • 2.Qe7#
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 5
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR1(G)
    • S(a);::QAR1(G)
  • Tries
    • Try
      • S(E);
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT::QAR1(G)
        • K(b);S_FLIGHT::QAB1(G)
        • K(b);OGATEB,S_FLIGHT,XS(E)::QAB1(G)
        • S(a);::QAR2(G)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT
    • Try
      • R(D);XS(a)
      • Threat
        • QAR1(G)
      • Vars
        • K(b);S_FLIGHT::QAR1(G)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINS(a),XS(E)::R(D),XS(a)
        • K(b);S_FLIGHT::QAR1(G)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(b);S_FLIGHT::QAR1(G)
        • S(a);N_GUARD::QAB1(G)
        • S(a);N_GUARD::QAB1(G),XS(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINS(a),XS(E)
  • Actual
    • S(E);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT::QAB(G)
      • K(b);P_SPINS(a),S_FLIGHT::QAR1(G)
      • K(b);S_FLIGHT::QAB1(G)
      • S(a);::QAR2(G)
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