MESON Chess Problem Database

Problem Display
PID: 21486 (3BR3/3p4/3kp3/R2p4/B7/3KN1P1/8/8 w - - 0 1)

Stewart, John

Good Companions (April), 1919

3BR3/3p4/3kp3/R2p4/B7/3KN1P1/8/8

#2

7 + 4

3132 The Good Companion Two-Mover 1922
887 Mate in Two Moves 1931

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Rxd5#
    • 1...d4
      • 2.Sc4#
    • 1...e5
      • 2.Sf5#
      • 2.Rxd5#
  • Tries
    • 1.Kc2?
      • 1...d4
        • 2.Sc4#
      • 1...e5
        • 2.Sf5#
        • 2.Rxd5#
      • 1...Ke5!
    • 1.Kd2?
      • 1...d4
        • 2.Sc4#
      • 1...e5
        • 2.Sf5#
        • 2.Rxd5#
      • 1...Ke5!
    • 1.Ke2?
      • 1...d4
        • 2.Sc4#
      • 1...e5
        • 2.Sf5#
        • 2.Rxd5#
      • 1...Ke5!
    • 1.Bb6?
      • 1...d4
        • 2.Sc4#
      • 1...e5
        • 2.Sf5#
        • 2.Rxd5#
      • 1...Ke5!
    • 1.Bf6?
      • 1...d4
        • 2.Be5#
      • 1...e5
        • 2.Bxe5#
      • 1...Kc7!
    • 1.Rc5?
      • 1...Ke5
        • 2.Rxd5#
      • 1...d4
        • 2.Be7#
      • 1...e5
        • 2.Rxd5#
      • 1...Kxc5!
    • 1.Re7?
      • 1...d4
        • 2.Sc4#
        • 2.Rxd7#
      • 1...e5
        • 2.Sf5#
        • 2.Rxd5#
      • 1...Ke5!
    • 1.Rg8?
      • 1...d4
        • 2.Sc4#
      • 1...e5
        • 2.Rg6#
      • 1...Ke5!
    • 1.Rh8?
      • 1...d4
        • 2.Sc4#
      • 1...e5
        • 2.Rh6#
      • 1...Ke5!
    • 1.g4?
      • 1...d4
        • 2.Sc4#
      • 1...e5
        • 2.Sf5#
        • 2.Rxd5#
      • 1...Ke5!
  • Keys
    • 1.Rf8!
      • 1...Ke5
        • 2.Sc4#
      • 1...d4
        • 2.Sc4#
      • 1...e5
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINP(a),S_FLIGHT::R1(E),XP(a)
    • P(a);N_GUARD::S(B)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(a);N_GUARD::S(B)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(a);N_GUARD::S(B)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(a);N_GUARD::S(B)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • B(F);
      • Vars
        • P(a);N_GUARD::S(B)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • B(F);
      • Vars
        • P(a);::B(F)
        • P(c);::B(F),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(E);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::R1(E),XP(a)
        • P(a);::B(F)
        • P(c);N_GUARD::R1(E),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • R(G);
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • R(G);
      • Vars
        • P(a);N_GUARD::S(B)
        • P(c);OGATEB,SBLOCK::R(G)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • R(G);
      • Vars
        • P(a);N_GUARD::S(B)
        • P(c);OGATEB,SBLOCK::R(G)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • P(C);
      • Vars
        • P(a);N_GUARD::S(B)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
  • Actual
    • R(G);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::S(B)
      • P(a);N_GUARD::S(B)
      • P(c);OGATEB,SBLOCK::R(G)
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