MESON Chess Problem Database

Problem Display
PID: 21506 (QK4B1/Pn1p3p/bp1p2N1/b2R4/r3k1p1/2p1B3/4Rnr1/4N3 w - - 0 1)

Sparke, Arthur M

Good Companions (January), 1919

QK4B1/Pn1p3p/bp1p2N1/b2R4/r3k1p1/2p1B3/4Rnr1/4N3

#2

9 + 13

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Bc1#
      • 2.Bd2#
      • 2.Bxf2#
      • 2.Bd4#
      • 2.Bf4#
      • 2.Bc5#
      • 2.Bg5#
      • 2.Bxb6#
      • 2.Bh6#
    • 1...Sd3
      • 2.Bf2#
    • 1...Sc5
      • 2.Re5#
    • 1...Sd8
      • 2.Re5#
    • 1...b5
      • 2.Bc1#
      • 2.Bd2#
      • 2.Bxf2#
      • 2.Bd4#
      • 2.Bf4#
      • 2.Bc5#
      • 2.Bg5#
      • 2.Bb6#
      • 2.Bh6#
  • Tries
    • 1.Qxb7?
      • threat
        • 2.Re5#
      • 1...Bxb7
        • 2.Bc1#
        • 2.Bd2#
        • 2.Bxf2#
        • 2.Bd4#
        • 2.Bf4#
        • 2.Bc5#
        • 2.Bg5#
        • 2.Bxb6#
        • 2.Bh6#
      • 1...hxg6!
  • Keys
    • 1.Kc7!
      • threat
        • 2.Qe8#
      • 1...Rc4+
        • 2.Bc5#
      • 1...b5+
        • 2.Bb6#
      • 1...Sd3
        • 2.Bf2#
      • 1...Sc5
        • 2.Re5#
      • 1...Sd8
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);S_CUTB(h)::R(B)+B(C)
    • S(k);::QAB(G)+R(D),DCHECK
  • Tries
    • Try
      • Q(G);XS(k)
      • Threat
        • QAB(G)+R(D),DCHECK
      • Refutation
        • P(m);XS(E)
  • Actual
    • K(H);S_FLIGHT
    • Threat
      • QAR(G)
    • Vars
      • R(d);CHECK,S_CUTB(h)::R(B)+B(C)
      • P(i);CHECK,S_CUTB(h)::R(B)+B(C)
      • S(a);S_CUTB(h)::R(B)+B(C)
      • S(k);::QAB(G)+R(D),DCHECK
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