MESON Chess Problem Database

Problem Display
PID: 21493 (5Bb1/8/nPPRp3/1qk5/p1N5/1p6/4NK2/2R1Q3 w - - 0 1)

Sparke, Arthur M

2nd Prize, Good Companions (December), 1919

5Bb1/8/nPPRp3/1qk5/p1N5/1p6/4NK2/2R1Q3

#2

9 + 7

3132 The Good Companion Two-Mover 1922
3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4
      • 2.Qa5#
    • 1...Qa5
      • 2.Qxa5#
    • 1...Qxb6
      • 2.Sa3#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Rd7#
        • 2.Rd8#
      • 1...Qxc4
        • 2.Qa5#
      • 1...Qxc6!
    • 1.Sb2+?
      • 1...Qc4
        • 2.Qa5#
      • 1...Kxb6!
    • 1.Sa3+?
      • 1...Qc4
        • 2.Qa5#
      • 1...Kxb6!
    • 1.Se3+?
      • 1...Qc4
        • 2.Qa5#
      • 1...Kxb6!
    • 1.Se5+?
      • 1...Qc4
        • 2.Qa5#
      • 1...Kxb6!
    • 1.Rd5+?
      • 1...Kxd5
        • 2.Qh1#
      • 1...Kxc6!
    • 1.Qd2?
      • threat
        • 2.Rxe6#
      • 1...Qxc4
        • 2.Qa5#
      • 1...Qxc6
        • 2.Rd5#
      • 1...Qxb6
        • 2.Sa3#
      • 1...Qa5
        • 2.Qxa5#
      • 1...e5
        • 2.Re6#
        • 2.Rf6#
        • 2.Rg6#
        • 2.Rh6#
      • 1...Qb4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sd3#
      • 1...Qxc4
        • 2.Qa5#
      • 1...Qxc6
        • 2.Rd5#
      • 1...Qxb6
        • 2.Sa3#
      • 1...Qb4
        • 2.Qe5#
      • 1...Qa5
        • 2.Qxa5#
      • 1...Bh7
        • 2.Sxe6#
      • 1...Sb4
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(c);OGATEB,P_SPINQ(c),XS(E)::QAR2(B)
    • Q(c);OGATEB::QAR2(B),XQ(c)
    • Q(c);N_GUARD,SBLOCK,XP(F)::R(A)+S(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);OGATEB,P_SPINQ(c),XS(E)::QAR2(B)
      • Refutation
        • Q(c);XP(G)
    • Try
      • S(E);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::QAR2(B)
      • Refutation
        • K(d);S_FLIGHT,XP(F)
    • Try
      • S(E);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::QAR2(B)
      • Refutation
        • K(d);S_FLIGHT,XP(F)
    • Try
      • S(E);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::QAR2(B)
      • Refutation
        • K(d);S_FLIGHT,XP(F)
    • Try
      • S(E);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::QAR2(B)
      • Refutation
        • K(d);S_FLIGHT,XP(F)
    • Try
      • R(H);CHECK
      • Vars
        • K(d);P-FLIGHT,XR(H)::QAB(B)
      • Refutation
        • K(d);P-FLIGHT,XP(G)
    • Try
      • Q(B);
      • Threat
        • B(I)+R(H),XP(f)
      • Vars
        • Q(c);OGATEB,P_SPINQ(c),XS(E)::QAR2(B)
        • Q(c);SBLOCK,XP(G)::B(I)+R(H),DCHECK
        • Q(c);N_GUARD,SBLOCK,XP(F)::R(A)+S(E)
        • Q(c);OGATEB::QAR2(B),XQ(c)
      • Refutation
        • Q(c);
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • Q(c);OGATEB,P_SPINQ(c),XS(E)::QAR2(B)
      • Q(c);SBLOCK,XP(G)::B(I)+R(H),DCHECK
      • Q(c);N_GUARD,SBLOCK,XP(F)::R(A)+S(E)
      • Q(c);SBLOCK::QAR2(B)
      • Q(c);OGATEB::QAR2(B),XQ(c)
      • B(g);N_GUARD::S(C),XP(f)
      • S(e);SBLOCK::QAB(B)
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