MESON Chess Problem Database

Problem Display
PID: 64816 (3Q3r/2n1p2b/1pRB1Pp1/3k2P1/3N4/r3pR1B/5N2/b6K w - - 0 1)

Sparke, Arthur M

Good Companions (August), 1921

3Q3r/2n1p2b/1pRB1Pp1/3k2P1/3N4/r3pR1B/5N2/b6K

#2

10 + 10

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Bg8
      • 2.Bh2#
      • 2.Bg3#
      • 2.Bf4#
      • 2.Bxc7#
    • 1...exd6
      • 2.Qxd6#
    • 1...e5
      • 2.Bf8#
  • Tries
    • 1.Be6+?
      • 1...Kxd4
        • 2.Rf4#
        • 2.Rc4#
      • 1...Sxe6!
    • 1.Bxe7+?
      • 1...Ke5
        • 2.Qd6#
      • 1...Rxd8!
    • 1.Rf5+?
      • 1...Kxd4
        • 2.Be5#
      • 1...e5
        • 2.Bf8#
      • 1...gxf5!
    • 1.Rc5+?
      • 1...Kxd4
        • 2.Rf4#
      • 1...bxc5!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Rf4#
      • 1...Bg8+
        • 2.Bh2#
      • 1...Kxd4
        • 2.Rf4#
      • 1...Bxd4
        • 2.Rxe3#
      • 1...exf2
        • 2.Rd3#
      • 1...exd6
        • 2.Qxd6#
      • 1...e2
        • 2.Rd3#
      • 1...e5
        • 2.Bf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(h);OGATE,P_SPINP(h),XB(H)::QAR1(J),XP(h)
    • P(h);OGATE,SBLOCK::QAR(J)+B(H)
  • Tries
    • Try
      • B(D);CHECK
      • Refutation
        • S(g);XB(D)
    • Try
      • B(H);CHECK,XP(h)
      • Vars
        • K(d);P-FLIGHT::QAB1(J)
      • Refutation
        • R(j);XQ(J)
    • Try
      • R(C);CHECK
      • Vars
        • K(d);P-FLIGHT,XS(E)::QAR(J)+B(H),DCHECK
        • P(h);OGATE,P_SPINP(h)::QAR(J)+B(H)
      • Refutation
        • P(f);XR(C)
    • Try
      • R(G);CHECK
      • Vars
        • K(d);P-FLIGHT,XS(E)::R(C)
      • Refutation
        • P(e);XR(G)
  • Actual
    • B(D);
    • Threat
      • B(D)+R(C)
    • Vars
      • B(i);CHECK,S_CUTR(j)::QAR(J)+B(H)
      • K(d);P-FLIGHT,XS(E)::R(C)
      • B(a);SBLOCK,XS(E)::B(D)+R(C),XP(c)
      • P(c);OGATE,XS(B)::B(D)+R(C)
      • P(h);OGATE,P_SPINP(h),XB(H)::QAR1(J),XP(h)
      • P(c);OGATE::B(D)+R(C)
      • P(h);OGATE,SBLOCK::QAR(J)+B(H)
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