MESON Chess Problem Database

Problem Display
PID: 139797 (b2R4/6p1/qp6/n1pp4/2Nk1PBQ/R4K2/1PP5/n7 w - - 0 1)

Ellerman, Arnoldo

Club Argentino de Ajedrez, 1915

b2R4/6p1/qp6/n1pp4/2Nk1PBQ/R4K2/1PP5/n7

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc4
      • 2.Qf2#
    • 1...Sxc4
      • 2.Rd3#
  • Tries
    • 1.Bh3?
      • threat
        • 2.f5#
      • 1...Qxc4
        • 2.Qf2#
      • 1...Sxc4
        • 2.Rd3#
      • 1...g5
        • 2.fxg5#
      • 1...Kxc4!
    • 1.Bh5?
      • threat
        • 2.f5#
      • 1...Qxc4
        • 2.Qf2#
      • 1...Sxc4
        • 2.Rd3#
      • 1...g5
        • 2.fxg5#
      • 1...Kxc4!
    • 1.Be6?
      • threat
        • 2.f5#
      • 1...Qxc4
        • 2.Qf2#
      • 1...Sxc4
        • 2.Rd3#
      • 1...g5
        • 2.fxg5#
      • 1...Kxc4!
    • 1.Bc8?
      • threat
        • 2.f5#
      • 1...Qxc4
        • 2.Qf2#
      • 1...Sxc4
        • 2.Rd3#
      • 1...g5
        • 2.fxg5#
      • 1...Kxc4!
    • 1.Rc3?
      • threat
        • 2.Qf2#
      • 1...Sxc4
        • 2.Rd3#
      • 1...Sxc2!
    • 1.Qe1?
      • threat
        • 2.Qc3#
        • 2.Qe4#
      • 1...Qxc4
        • 2.Qf2#
        • 2.Qg1#
        • 2.Qe3#
        • 2.Qe4#
        • 2.Qe5#
      • 1...Kxc4!
  • Keys
    • 1.Bd7!
      • threat
        • 2.f5#
      • 1...dxc4+
        • 2.Bc6#
      • 1...Kxc4
        • 2.Ra4#
      • 1...Qxc4
        • 2.Qf2#
      • 1...Sxc4
        • 2.Rd3#
      • 1...g5
        • 2.fxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(f);SBLOCK,XS(E)::QAB(H)
    • S(c);SBLOCK,XS(E)::R1(C)
  • Tries
    • Try
      • B(G);
      • Threat
        • QAR(H)+P(F)
      • Vars
        • Q(f);SBLOCK,XS(E)::QAB(H)
        • S(c);SBLOCK,XS(E)::R1(C)
        • P(h);OGATE::QAR(H)+P(F),XP(h)
      • Refutation
        • K(b);N_SPINP(e),P-FLIGHT,XS(E)
    • Try
      • B(G);
      • Threat
        • QAR(H)+P(F)
      • Vars
        • Q(f);SBLOCK,XS(E)::QAB(H)
        • S(c);SBLOCK,XS(E)::R1(C)
        • P(h);OGATE::QAR(H)+P(F),XP(h)
      • Refutation
        • K(b);N_SPINP(e),P-FLIGHT,XS(E)
    • Try
      • B(G);
      • Threat
        • QAR(H)+P(F)
      • Vars
        • Q(f);SBLOCK,XS(E)::QAB(H)
        • S(c);SBLOCK,XS(E)::R1(C)
        • P(h);OGATE::QAR(H)+P(F),XP(h)
      • Refutation
        • K(b);P-FLIGHT,XS(E)
    • Try
      • B(G);
      • Threat
        • QAR(H)+P(F)
      • Vars
        • Q(f);SBLOCK,XS(E)::QAB(H)
        • S(c);SBLOCK,XS(E)::R1(C)
        • P(h);OGATE::QAR(H)+P(F),XP(h)
      • Refutation
        • K(b);N_SPINP(e),P-FLIGHT,XS(E)
    • Try
      • R(C);
      • Threat
        • QAB(H)
      • Vars
        • S(c);SBLOCK,XS(E)::R1(C)
      • Refutation
        • S(a);XP(B)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);N_SPINP(e),P-FLIGHT,XS(E)
  • Actual
    • B(G);N_PINP(e)
    • Threat
      • QAR(H)+P(F)
    • Vars
      • P(e);CHECK,OGATEB,SBLOCK,XS(E)::R(I)+B(G)
      • K(b);OGATEB,P-FLIGHT,XS(E)::R(C)
      • Q(f);SBLOCK,XS(E)::QAB(H)
      • S(c);SBLOCK,XS(E)::R1(C)
      • P(h);OGATE::QAR(H)+P(F),XP(h)
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