MESON Chess Problem Database

Problem Display
PID: 49964 (B4R2/1N6/1B1K3p/rb2p2n/3Nk1P1/2n5/3PP3/Q1r1bR2 w - - 0 1)

Degener, Udo

Degenkolbe, Mirko

3rd Prize, Schach, 1991

B4R2/1N6/1B1K3p/rb2p2n/3Nk1P1/2n5/3PP3/Q1r1bR2

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sc5#
    • 1...Sd1
      • 2.Sc5#
    • 1...Sa2
      • 2.Sc5#
    • 1...Sxe2
      • 2.Sc5#
    • 1...Sa4
      • 2.Sc5#
    • 1...exd4
      • 2.Sc5#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Sc5#
      • 1...Bc6
        • 2.d3#
      • 1...Rxc2!
    • 1.Sf3?
      • threat
        • 2.Sc5#
      • 1...Bxd2
        • 2.Sxd2#
      • 1...Bc6
        • 2.d3#
      • 1...Sd5
        • 2.Qxe5#
      • 1...Sf6!
    • 1.Sf5?
      • threat
        • 2.Sc5#
      • 1...Bc6
        • 2.d3#
      • 1...Sd5
        • 2.Qxe5#
      • 1...Bf2!
    • 1.Se6?
      • threat
        • 2.Sbc5#
      • 1...Bc6
        • 2.d3#
      • 1...Sd5
        • 2.Qxe5#
      • 1...Bxd2!
    • 1.Sxa5+?
      • 1...Sd5
        • 2.Bxd5#
      • 1...Bc6!
    • 1.Qxc3?
      • threat
        • 2.Sc5#
        • 2.Qe3#
        • 2.Qf3#
      • 1...Bxd2
        • 2.Sc5#
        • 2.Qf3#
      • 1...Bxe2
        • 2.Sxa5#
        • 2.Sc5#
        • 2.Qe3#
      • 1...exd4
        • 2.Sc5#
        • 2.Qxd4#
        • 2.Qf3#
      • 1...Bc6
        • 2.Qd3#
        • 2.Qe3#
        • 2.Qf3#
      • 1...Ra3
        • 2.Sc5#
      • 1...Bf2
        • 2.Sc5#
        • 2.Qf3#
      • 1...Bd3
        • 2.Sxa5#
        • 2.Sc5#
        • 2.Qxd3#
        • 2.exd3#
      • 1...Rxc3!
  • Keys
    • 1.Sb3!
      • threat
        • 2.S7c5#
      • 1...Bxd2
        • 2.Sxd2#
      • 1...Bc6
        • 2.d3#
      • 1...Sd5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • S(c);::B(J)+S(I),DCHECK
    • S(c);XP(D)::B(J)+S(I),DCHECK
    • P(g);SBLOCK,XS(E)::B(J)+S(I),DCHECK
  • Tries
    • Try
      • S(E);
      • Threat
        • B(J)+S(I),DCHECK
      • Vars
        • B(f);N_GUARD::P(C)
      • Refutation
        • R(a);XS(E)
    • Try
      • S(E);
      • Threat
        • B(J)+S(I),DCHECK
      • Vars
        • B(b);XP(C)::S(E),XB(b)
        • B(f);N_GUARD::P(C)
        • S(c);OGATE::QAR1(A),XP(g)
      • Refutation
        • S(h);
    • Try
      • S(E);
      • Threat
        • B(J)+S(I),DCHECK
      • Vars
        • B(f);N_GUARD::P(C)
        • S(c);OGATE::QAR1(A),XP(g)
      • Refutation
        • B(b);
    • Try
      • S(E);
      • Threat
        • B(J)+S(I),DCHECK
      • Vars
        • B(f);N_GUARD::P(C)
        • S(c);OGATE::QAR1(A),XP(g)
      • Refutation
        • B(b);XP(C)
    • Try
      • S(I);CHECK,XR(e)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(J),XS(c)
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • Q(A);XS(c)
      • Threat
        • DUALS(3)
      • Vars
        • R(e);::B(J)+S(I),DCHECK
      • Refutation
        • R(a);XQ(A)
  • Actual
    • S(E);
    • Threat
      • B(J)+S(I),DCHECK
    • Vars
      • B(b);XP(C)::S(E),XB(b)
      • B(f);N_GUARD::P(C)
      • S(c);OGATE::QAR1(A),XP(g)
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