MESON Chess Problem Database

Problem Display
PID: 65170 (1B4q1/4r1pb/3Q3p/RB1P2pN/3pk1P1/4pN1R/1p3p2/1Kb5 w - - 0 1)

Degener, Udo

2nd HM., Springaren, 1989

1B4q1/4r1pb/3Q3p/RB1P2pN/3pk1P1/4pN1R/1p3p2/1Kb5

#2

10 + 12

4827 FIDE Album (1989-1991) 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qxe5#
    • 1...Ra7
      • 2.Qe5#
    • 1...Rb7
      • 2.Qe5#
    • 1...Rc7
      • 2.Qe5#
    • 1...Rd7
      • 2.Qe5#
    • 1...Rf7
      • 2.Qe5#
      • 2.Qe6#
    • 1...d3
      • 2.Ra4#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Sd2+?
      • 1...exd2
        • 2.Bd3#
      • 1...Bxd2!
    • 1.Sh2?
      • threat
        • 2.Sg3#
      • 1...d3
        • 2.Ra4#
      • 1...Re5
        • 2.Qxe5#
      • 1...e2
        • 2.Bd3#
      • 1...f1S!
    • 1.Be2?
      • threat
        • 2.Sg3#
      • 1...Re5
        • 2.Qxe5#
      • 1...f1S!
    • 1.Qc5?
      • threat
        • 2.Qxd4#
      • 1...d3
        • 2.Ra4#
        • 2.Qd4#
        • 2.Qc4#
      • 1...Qxd5!
    • 1.Qxe7+?
      • 1...Qe6
        • 2.Qxe6#
      • 1...Kxd5+!
    • 1.Qb6?
      • threat
        • 2.Qxd4#
      • 1...Kxd5+
        • 2.Bd3#
      • 1...d3
        • 2.Qd4#
      • 1...Qxd5!
    • 1.Qg6+?
      • 1...Kxd5
        • 2.Bf1#
        • 2.Be2#
        • 2.Bd3#
        • 2.Ba6#
      • 1...Bxg6!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qxd4#
      • 1...Kxd5+
        • 2.Bd3#
      • 1...Qxd5
        • 2.Sg3#
      • 1...gxf6
        • 2.Sxf6#
      • 1...Re5
        • 2.Qxe5#
      • 1...d3
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(i);N_GUARD::QAR1(I),XR(i)
    • R(i);N_GUARD::QAR1(I)
    • P(e);OGATEB::R(E)
    • P(j);N_GUARD::S(H)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • P(d);XS(B)::B(F)
      • Refutation
        • B(a);XS(B)
    • Try
      • S(B);
      • Threat
        • S(H)
      • Vars
        • P(e);OGATEB::R(E)
        • R(i);N_GUARD::QAR1(I),XR(i)
        • P(d);::B(F)
      • Refutation
        • P(c);
    • Try
      • B(F);
      • Threat
        • S(H)
      • Vars
        • R(i);N_GUARD::QAR1(I),XR(i)
      • Refutation
        • P(c);
    • Try
      • Q(I);
      • Threat
        • QAR1(I),XP(e)
      • Refutation
        • Q(l);XP(G)
    • Try
      • Q(I);CHECK,XR(i)
      • Vars
        • Q(l);N_GUARD,P_SPINQ(l)::QAR2(I),XQ(l)
      • Refutation
        • K(f);CHECK,S_FLIGHT,XP(G)
    • Try
      • Q(I);
      • Threat
        • QAR1(I),XP(e)
      • Vars
        • K(f);CHECK,S_FLIGHT,XP(G)::R(E)+B(F)
        • P(e);::QAR1(I)
      • Refutation
        • Q(l);XP(G)
    • Try
      • Q(I);CHECK
      • Refutation
        • B(k);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I),XP(e)
    • Vars
      • K(f);CHECK,S_FLIGHT,XP(G)::R(E)+B(F)
      • Q(l);SBLOCK,XP(G)::S(H)
      • P(j);XQ(I)::S(H),XP(j)
      • R(i);N_GUARD::QAR1(I),XR(i)
      • P(e);::QAR1(I)
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