MESON Chess Problem Database

Problem Display
PID: 18343 (1r2b3/p1R2p2/Q2N4/1n2PR2/1p1k4/pB6/1n1PP3/B5K1 w - - 0 1)

Goldschmeding, Cornelis

Die Schwalbe, 1955

1r2b3/p1R2p2/Q2N4/1n2PR2/1p1k4/pB6/1n1PP3/B5K1

#2

10 + 9

273 Mat Plus 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.e3#
    • 1...Sxd6
      • 2.Qd3#
    • 1...Sxc7
      • 2.Qc4#
  • Tries
    • 1.Bxb2+?
      • 1...Sc3
        • 2.Qd3#
        • 2.Qc4#
        • 2.e3#
      • 1...axb2!
    • 1.Qc6?
      • threat
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qc4#
        • 2.Qc5#
      • 1...Sxd6
        • 2.Qd5#
      • 1...Sxc7
        • 2.Qc4#
      • 1...Sc3
        • 2.Qc5#
      • 1...Bxc6!
    • 1.Qxa7+?
      • 1...Rb6
        • 2.Qxb6#
      • 1...Sxa7!
    • 1.e6?
      • threat
        • 2.Rd5#
        • 2.Rc4#
      • 1...Sxd6
        • 2.Qd3#
      • 1...Sxc7
        • 2.Qd3#
        • 2.Qc4#
        • 2.e3#
      • 1...fxe6
        • 2.Rc4#
      • 1...Rc8
        • 2.Rd5#
      • 1...Sc3
        • 2.e3#
      • 1...Bc6!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qxb4#
      • 1...Sxd6
        • 2.Qd5#
      • 1...Sxc7
        • 2.Rf4#
      • 1...Sc3
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(e);N_SPINS(a)::P(D)
    • S(e);OGATE,XS(I)::QAR1(H)
    • S(e);OGATE,XR(J)::QAR1(H)
  • Tries
    • Try
      • B(A);CHECK,XS(a)
      • Refutation
        • P(b);XB(A)
    • Try
      • Q(H);
      • Threat
        • DUALS(4)
      • Vars
        • S(e);XS(I)::QAR1(H)
        • S(e);XR(J)::QAR1(H)
        • S(e);N_SPINS(a)::QAB1(H)
      • Refutation
        • B(i);XQ(H)
    • Try
      • Q(H);CHECK,XP(f)
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAB(H),XR(h)
      • Refutation
        • S(e);XQ(H)
    • Try
      • P(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);OGATE,XS(I)::QAR1(H)
        • P(g);XP(F)::R1(J)
        • R(h);::R1(G)
        • S(e);N_SPINS(a)::P(D)
      • Refutation
        • B(i);
  • Actual
    • Q(H);
    • Threat
      • QAR2(H),XP(c)
    • Vars
      • S(e);OGATE,XS(I)::QAR1(H)
      • S(e);XR(J)::R(G)
      • S(e);N_SPINS(a),OGATE::QAB1(H)
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