MESON Chess Problem Database

Problem Display
PID: 132753 (1B3N2/2p1p3/4R3/3kn3/R1q5/1Q2P1N1/4P3/K7 w - - 0 1)

Sumner, Christopher Richard Benson

The Field, 1958

(First published on Thu Jul 10 1958)

1B3N2/2p1p3/4R3/3kn3/R1q5/1Q2P1N1/4P3/K7

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Qxc4#
    • 1...Sf3
      • 2.Qxc4#
    • 1...Sg4
      • 2.Qxc4#
    • 1...Sc6
      • 2.Qxc4#
    • 1...Sg6
      • 2.Qxc4#
    • 1...Sd7
      • 2.Qxc4#
    • 1...Sf7
      • 2.Qxc4#
    • 1...c6
      • 2.Rxe5#
  • Tries
    • 1.Qb5+?
      • 1...Qc5
        • 2.Rd4#
        • 2.e4#
      • 1...c5
        • 2.Rxe5#
      • 1...Qxb5!
    • 1.e4+?
      • 1...Kc5
        • 2.Ba7#
      • 1...Kd4!
  • Keys
    • 1.Se4!
      • 1...Kxe4
        • 2.Qd3#
      • 1...Qxb3
        • 2.Rd4#
      • 1...Sd3
        • 2.Qxc4#
      • 1...Sf3
        • 2.Qxc4#
      • 1...Sg4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Qxc4#
      • 1...Sg6
        • 2.Qxc4#
      • 1...Sd7
        • 2.Qxc4#
      • 1...Sf7
        • 2.Qxc4#
      • 1...c5
        • 2.Sc3#
      • 1...c6
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::QAB1(C),XQ(a)
    • P(d);SBLOCK::R1(G),XS(c)
  • Tries
    • Try
      • Q(C);CHECK,N_PINQ(a)
      • Vars
        • P(d);P_SPINP(d)::R1(G),XS(c)
      • Refutation
        • Q(a);XQ(C)
    • Try
      • P(D);CHECK
      • Vars
        • K(b);N_SPINQ(a),P-FLIGHT::B(H)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(E);
    • Vars
      • K(b);P_SPINS(c),S_FLIGHT,XS(E)::QAB1(C)
      • Q(a);N_SPINQ(a),OGATE,XQ(C)::R1(F)
      • S(c);N_GUARD::QAB1(C),XQ(a)
      • P(d);SBLOCK::S(E)
      • P(d);SBLOCK::R1(G),XS(c)
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