MESON Chess Problem Database

Problem Display
PID: 21172 (QB6/b2R4/2K2R2/1Pp3pr/4k3/n7/1NqP1P2/1B1rn2b w - - 0 1)

Sparke, Arthur M

2nd HM., Good Companions (December), 1917

QB6/b2R4/2K2R2/1Pp3pr/4k3/n7/1NqP1P2/1B1rn2b

#2

10 + 10

15 British Chess Magazine 1918
3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Bb6
      • 2.Kxb6#
    • 1...Sg2
      • 2.f3#
    • 1...Sxb5
      • 2.Kxb5#
    • 1...g4
      • 2.Rf4#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Kc7#
      • 1...Rxd2
        • 2.Sxd2#
      • 1...Bxb8
        • 2.Kxc5#
        • 2.Kb6#
      • 1...Sxb5
        • 2.Kxb5#
      • 1...Bb6
        • 2.Kxb6#
      • 1...g4
        • 2.Rf4#
      • 1...Sxc4!
    • 1.Rd4+?
      • 1...cxd4+
        • 2.Kd6#
        • 2.Kd7#
      • 1...Kxd4+!
  • Keys
    • 1.d4!
      • threat
        • 2.Kc7#
      • 1...cxd4+
        • 2.Kd6#
      • 1...Rxd4
        • 2.Re7#
      • 1...Bxb8
        • 2.Kb6#
      • 1...Sxb5
        • 2.Kxb5#
      • 1...Bb6
        • 2.Kxb6#
      • 1...g4
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(j);::QAB(I)+K(F),XB(j)
    • S(b);N_GUARD,S_CUTB(c)::P(D)
    • S(e);XP(E)::QAB(I)+K(F),XS(e)
    • P(h);N_GUARD::R1(G)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB(I)+K(F)
      • Vars
        • R(a);XP(C)::S(B),XR(a)
        • S(e);XP(E)::QAB(I)+K(F),XS(e)
        • B(j);::QAB(I)+K(F),XB(j)
        • P(h);N_GUARD::R1(G)
      • Refutation
        • S(e);XS(B)
    • Try
      • R(H);CHECK
      • Refutation
        • K(f);CHECK,N_SPINQ(d),P-FLIGHT,XR(H)
  • Actual
    • P(C);
    • Threat
      • QAB(I)+K(F)
    • Vars
      • P(g);CHECK,SBLOCK,XP(C)::QAB(I)+K(F)
      • R(a);SBLOCK,XP(C)::R(H)
      • B(j);XB(J)::QAB(I)+K(F)
      • S(e);XP(E)::QAB(I)+K(F),XS(e)
      • B(j);::QAB(I)+K(F),XB(j)
      • P(h);N_GUARD::R1(G)
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