MESON Chess Problem Database

Problem Display
PID: 64817 (2b2BBb/1Pp1n3/2p3pN/R2Nk3/5p2/1Q3P2/n2R4/K7 w - - 0 1)

Guest, EMC

Good Companions (February), 1922

2b2BBb/1Pp1n3/2p3pN/R2Nk3/5p2/1Q3P2/n2R4/K7

#2

10 + 9

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6+
      • 2.Sf6#
    • 1...Sf5
      • 2.Sg4#
  • Tries
    • 1.Sxe7+?
      • 1...Kf6
        • 2.Qf7#
      • 1...c5!
    • 1.Re2+?
      • 1...Kd4
        • 2.Re4#
      • 1...Kd6+!
    • 1.Qb2+?
      • 1...Kd6
        • 2.Sf6#
      • 1...Sc3!
    • 1.Qc3+?
      • 1...Kd6
        • 2.Sf6#
      • 1...Sxc3!
    • 1.Qe3+?
      • 1...Kd6+
        • 2.Sf6#
      • 1...fxe3!
    • 1.bxc8Q?
      • threat
        • 2.Sf7#
        • 2.Qe6#
        • 2.Qxc7#
      • 1...Kd6+
        • 2.Sf6#
      • 1...Sxd5
        • 2.Sg4#
        • 2.Qe6#
      • 1...Sxg8
        • 2.Sg4#
        • 2.Sf7#
      • 1...cxd5
        • 2.Qe6#
      • 1...Sf5
        • 2.Sg4#
        • 2.Sf7#
        • 2.Qe6#
      • 1...Sxc8!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qxc7#
      • 1...Kd6+
        • 2.Sf6#
      • 1...Sxd5
        • 2.Qd4#
      • 1...Sxg8
        • 2.Re2#
      • 1...cxd5
        • 2.Re2#
      • 1...cxb6
        • 2.b8Q#
        • 2.b8B#
      • 1...Sf5
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);CHECK,P_SPINS(g),S_FLIGHT::R(B)+S(F)
    • S(g);SBLOCK,S_CUTB(h)::S(G)
  • Tries
    • Try
      • S(F);CHECK,XS(g)
      • Vars
        • K(c);S_FLIGHT::QAR1(C)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • R(B);CHECK
      • Vars
        • K(c);S_FLIGHT::R1(B)
      • Refutation
        • K(c);CHECK,P_SPINS(g),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P_PINQ(C),P_SPINS(g),S_FLIGHT::R(B)+S(F)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P_PINQ(C),P_SPINS(g),S_FLIGHT::R(B)+S(F)
      • Refutation
        • S(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);CHECK,P_SPINS(g),S_FLIGHT::R(B)+S(F)
      • Refutation
        • P(b);XQ(C)
    • Try
      • P(H);XB(h)
      • Threat
        • DUALS(3)
      • Vars
        • K(c);CHECK,P_SPINS(g),S_FLIGHT::R(B)+S(F)
        • P(d);P_SPINP(d),XS(F)::QAR1(H)
      • Refutation
        • S(g);XQ(H)
  • Actual
    • Q(C);
    • Threat
      • QAB(C),XP(f)
    • Vars
      • K(c);CHECK,P_SPINP(d),P_SPINS(g),S_FLIGHT::R(B)+S(F)
      • S(g);P_SPINS(g),XS(F)::QAB1(C)
      • S(g);XB(J)::R(B)
      • P(d);P_SPINP(d),XS(F)::R(B)
      • P(f);XQ(C)::P=Q
      • S(g);SBLOCK,S_CUTB(h)::S(G)
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