MESON Chess Problem Database

Problem Display
PID: 60760 (8/1p1br3/8/4p2Q/RN2k1N1/2K3P1/2n1P3/1B2n3 w - - 0 1)

Soby, TS

Good Companions (November), 1919

8/1p1br3/8/4p2Q/RN2k1N1/2K3P1/2n1P3/1B2n3

#2

8 + 7

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rf7
      • 2.Qxe5#
    • 1...Rg7
      • 2.Qxe5#
    • 1...Rh7
      • 2.Qxe5#
    • 1...Bxa4
      • 2.Qg6#
    • 1...Bb5
      • 2.Qg6#
    • 1...Bc6
      • 2.Qg6#
    • 1...Be6
      • 2.Qxe5#
    • 1...Sg2
      • 2.Bxc2#
    • 1...Sf3
      • 2.Bxc2#
  • Tries
    • 1.Sxc2+?
      • 1...Bxa4
        • 2.Sf6#
      • 1...Kd5!
    • 1.Sd5+?
      • 1...Bxa4
        • 2.Sgf6#
        • 2.Sdf6#
      • 1...Kxd5!
    • 1.Bxc2+?
      • 1...Sd3
        • 2.Bxd3#
      • 1...Sxc2!
    • 1.Qh1+?
      • 1...Sg2
        • 2.Bxc2#
      • 1...Sf3
        • 2.Bxc2#
        • 2.Qxf3#
      • 1...Kf5!
    • 1.Qg5?
      • threat
        • 2.Sf2#
        • 2.Sf6#
      • 1...Re6
        • 2.Sf2#
      • 1...Rf7
        • 2.Qxe5#
      • 1...Sd3
        • 2.Sf6#
      • 1...Bxg4!
  • Keys
    • 1.Ba2!
      • threat
        • 2.Bd5#
      • 1...Bxg4
        • 2.Sxc2#
      • 1...Sxb4
        • 2.Rxb4#
      • 1...Bc6
        • 2.Qg6#
      • 1...Be6
        • 2.Qxe5#
      • 1...Se3
        • 2.Sf2#
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(g);N_GUARD::QAR1(H),XP(d)
    • B(f);N_GUARD,XR(E)::QAB(H)
    • B(f);N_GUARD::QAB(H)
    • B(f);S_CUTR(g)::QAR1(H),XP(d)
    • S(a);N_GUARD::B(A),XS(b)
  • Tries
    • Try
      • S(F);CHECK,XS(b)
      • Vars
        • B(f);XR(E)::S(G)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT
    • Try
      • S(F);CHECK
      • Refutation
        • K(c);N_SPINS(b),P_SPINP(d),S_FLIGHT,XS(F)
    • Try
      • B(A);CHECK,XS(b)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::B(A),XS(a)
      • Refutation
        • S(a);XB(A)
    • Try
      • Q(H);CHECK
      • Vars
        • S(a);::B(A),XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);::S(G)
        • R(g);N_GUARD::QAR1(H),XP(d)
        • S(a);N_SPINS(b)::S(G)
      • Refutation
        • B(f);XS(G)
  • Actual
    • B(A);N_PINS(b)
    • Threat
      • B(A)
    • Vars
      • B(f);N_GUARD,XS(G)::R(E)+S(F),XS(b)
      • S(b);OGATE,P_SPINS(b),XS(F)::R(E),XS(b)
      • B(f);N_GUARD::QAB(H)
      • B(f);S_CUTR(g)::QAR1(H),XP(d)
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