MESON Chess Problem Database

Problem Display
PID: 64665 (B7/2Kp1N2/5pr1/R2R4/1B2k1p1/1pp1P1nQ/1pb1p1Pb/8 w - - 0 1)

Sparke, Arthur M

Good Companions (January), 1919

B7/2Kp1N2/5pr1/R2R4/1B2k1p1/1pp1P1nQ/1pb1p1Pb/8

#2

9 + 12

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Re5#
    • 1...Sf1+
      • 2.Rd6#
    • 1...Sh1+
      • 2.Rd6#
    • 1...Sf5+
      • 2.Rd6#
    • 1...Sh5+
      • 2.Rd6#
  • Tries
    • 1.Qxg4+?
      • 1...Kxe3
        • 2.Bc5#
        • 2.Qf3#
        • 2.Qd4#
      • 1...Rxg4!
    • 1.Qxg3?
      • threat
        • 2.Sd6#
        • 2.Rd4#
        • 2.Rd6#
        • 2.Rxd7#
      • 1...Rg5
        • 2.Sd6#
        • 2.Rd4#
      • 1...Rg8
        • 2.Sd6#
        • 2.Rd4#
      • 1...f5
        • 2.Rd4#
        • 2.Rd6#
      • 1...d6
        • 2.Sxd6#
        • 2.Rd4#
        • 2.Rxd6#
      • 1...Bxg3+!
  • Keys
    • 1.Ra4!
      • threat
        • 2.Bc5#
      • 1...Sf1+
        • 2.Bd6#
      • 1...Sh1+
        • 2.Bd6#
      • 1...Sf5+
        • 2.Rd6#
      • 1...Sh5+
        • 2.Bd6#
      • 1...Kxe3
        • 2.Bc5#
      • 1...Bd3
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::B(I)+R(F),DCHECK
    • S(g);CHECK::B(I)+R(F)
  • Tries
    • Try
      • Q(C);CHECK,XP(i)
      • Refutation
        • R(k);XQ(C)
    • Try
      • Q(C);P_SPINQ(C),XS(g)
      • Threat
        • DUALS(4)
      • Refutation
        • B(d);CHECK,XQ(C)
  • Actual
    • R(E);
    • Threat
      • R(E)+B(D)
    • Vars
      • S(g);CHECK::R(E)+B(D)
      • S(g);CHECK,SBLOCK::B(I)+R(F)
      • K(h);P-FLIGHT,P_SPINS(g),XP(B)::B(D)
      • B(b);SBLOCK::B(I)+R(F),DCHECK
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