MESON Chess Problem Database

Problem Display
PID: 21003 (qB1N4/p3p3/b3P3/1pNk1p2/1R1P4/K4n1r/7p/2QR3B w - - 0 1)

Sparke, Arthur M

3rd Prize, Good Companions (December), 1915

qB1N4/p3p3/b3P3/1pNk1p2/1R1P4/K4n1r/7p/2QR3B

#2

10 + 10

15 British Chess Magazine 1916
3132 The Good Companion Two-Mover 1922
15 British Chess Magazine 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Rh5
      • 2.Bxf3#
    • 1...Rh6
      • 2.Bxf3#
    • 1...Rh7
      • 2.Bxf3#
    • 1...Rh8
      • 2.Bxf3#
  • Tries
    • 1.Sa4?
      • threat
        • 2.Sc3#
      • 1...Ke4
        • 2.Sc3#
        • 2.d5#
      • 1...Qxb8
        • 2.Qc6#
      • 1...Qc6
        • 2.Qxc6#
      • 1...bxa4!
    • 1.Qf4?
      • threat
        • 2.Qe5#
        • 2.Qxf5#
      • 1...Rh5
        • 2.Bxf3#
        • 2.Qe5#
        • 2.Qxf3#
      • 1...Qxb8!
    • 1.Qg5?
      • threat
        • 2.Qxf5#
      • 1...Rh5
        • 2.Bxf3#
      • 1...Qxb8!
    • 1.Qb1?
      • threat
        • 2.Qa2#
        • 2.Qxf5#
        • 2.Qb3#
      • 1...Rh5
        • 2.Bxf3#
        • 2.Qa2#
        • 2.Qb3#
      • 1...f4
        • 2.Qa2#
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qb3#
      • 1...Qxb8!
    • 1.Qc2?
      • threat
        • 2.Qb3#
        • 2.Qxf5#
        • 2.Qa2#
      • 1...Rh5
        • 2.Bxf3#
        • 2.Qb3#
        • 2.Qa2#
      • 1...f4
        • 2.Qb3#
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qa2#
      • 1...Qxb8!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sc3#
      • 1...Sxd4+
        • 2.Sg3#
      • 1...Kxe4
        • 2.d5#
      • 1...Qxb8
        • 2.Qc6#
      • 1...fxe4
        • 2.Qc5#
      • 1...Qc6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::B(C),XS(b)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(G)
      • Vars
        • Q(j);N_GUARD,XB(I)::QAB1(A)
        • Q(j);N_GUARD::QAB1(A),XQ(j)
      • Refutation
        • P(d);XS(G)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • Q(j);XB(I)
    • Try
      • Q(A);P_PINP(f)
      • Threat
        • QAR2(A),XP(f)
      • Vars
        • R(c);N_GUARD::B(C),XS(b)
      • Refutation
        • Q(j);XB(I)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • Q(j);XB(I)
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • Q(j);XB(I)
  • Actual
    • S(G);N_PINS(b)
    • Threat
      • S(G)
    • Vars
      • S(b);CHECK,P_SPINS(b),XP(F)::B(C)+S(G)
      • K(e);OGATE,P_SPINS(b),S_FLIGHT,XS(G)::R(E)+P(F)
      • Q(j);N_GUARD,XB(I)::QAB1(A)
      • P(f);SBLOCK,XS(G)::QAR1(A)
      • Q(j);N_GUARD::QAB1(A),XQ(j)
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