MESON Chess Problem Database

Problem Display
PID: 22149 (R6r/3rbQ1b/N1p1N3/1p6/4R3/k1P5/Pnp2q2/K1Bn4 w - - 0 1)

Goldschmeding, Cornelis

1st Prize, Probleemblad, 1960

R6r/3rbQ1b/N1p1N3/1p6/4R3/k1P5/Pnp2q2/K1Bn4

#2

9 + 11

3749 FIDE Album (1959-1961) 1966
5862 An ABC of Chess Problems 1970
4640 Chess Wizardry: The New ABC of Chess Problems 1996
259 Thema Danicum 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc3
      • 2.Bxb2#
    • 1...Se3
      • 2.Bxb2#
  • Tries
    • 1.Sac5+?
      • 1...Ra7
        • 2.Rxa7#
      • 1...Rxa8!
    • 1.Sac7+?
      • 1...Qa7
        • 2.Rxa7#
      • 1...Rxa8!
    • 1.Sec5?
      • threat
        • 2.Qb3#
      • 1...Rd5
        • 2.Sb8#
      • 1...Bg8
        • 2.Sc7#
      • 1...Qxf7!
    • 1.Sec7?
      • threat
        • 2.Qb3#
      • 1...Qxf7
        • 2.Sb8#
      • 1...Bg8
        • 2.Sc5#
      • 1...Rd5!
    • 1.Sd8?
      • threat
        • 2.Qb3#
      • 1...Qxf7
        • 2.Sc7#
      • 1...Rd5
        • 2.Sc5#
      • 1...Bg8!
    • 1.Sf8?
      • threat
        • 2.Qb3#
      • 1...Qxf7
        • 2.Sc7#
      • 1...Rd5
        • 2.Sc5#
      • 1...Bg8!
    • 1.Ra4+?
      • 1...Kxa4
        • 2.Sac5#
      • 1...bxa4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qb3#
      • 1...Ka4
        • 2.Sc5#
      • 1...Qxf7
        • 2.Sxc2#
      • 1...Rd5
        • 2.Sb8#
      • 1...Bg8
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD,XP(D)::B(B),XS(b)
    • S(a);N_GUARD::B(B),XS(b)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::R(I),XR(h)
      • Refutation
        • R(k);XR(I)
    • Try
      • S(F);CHECK
      • Vars
        • Q(d);N_GUARD,P_SPINQ(d)::R(I),XQ(d)
      • Refutation
        • R(k);XR(I)
    • Try
      • S(G);
      • Threat
        • QAR1(H)
      • Vars
        • R(h);N_GUARD::R(I)+S(F)
        • B(j);S_CUTR(k)::R(I)+S(F)
      • Refutation
        • Q(d);XQ(H)
    • Try
      • S(G);
      • Threat
        • QAR1(H)
      • Vars
        • Q(d);N_GUARD,XQ(H)::R(I)+S(F)
        • B(j);S_CUTR(k)::R(I)+S(F)
      • Refutation
        • R(h);
    • Try
      • S(G);
      • Threat
        • QAR1(H)
      • Vars
        • Q(d);N_GUARD,XQ(H)::R(I)+S(F)
        • R(h);N_GUARD::R(I)+S(F)
      • Refutation
        • B(j);
    • Try
      • S(G);
      • Threat
        • QAR1(H)
      • Vars
        • Q(d);N_GUARD,XQ(H)::R(I)+S(F)
        • R(h);N_GUARD::R(I)+S(F)
      • Refutation
        • B(j);
    • Try
      • R(E);CHECK
      • Vars
        • K(e);N_SPINS(b),P-FLIGHT,XR(E)::R(I)+S(F),DCHECK
      • Refutation
        • P(f);XR(E)
  • Actual
    • S(G);
    • Threat
      • QAR1(H)
    • Vars
      • K(e);N_SPINS(b),P-FLIGHT::R(I)+S(F),DCHECK
      • Q(d);N_GUARD,XQ(H)::S(G),XP(c)
      • R(h);N_GUARD::R(I)+S(F)
      • B(j);S_CUTR(k)::R(I)+S(F)
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