MESON Chess Problem Database

Problem Display
PID: 274658 (1Q6/1N1b4/rn6/1P5R/kP6/3NpR2/P1pP4/K1B2B2 w - - 0 1)

Degener, Udo

Springaren, 1992

1Q6/1N1b4/rn6/1P5R/kP6/3NpR2/P1pP4/K1B2B2

#2

12 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Qxa7#
    • 1...Bxb5
      • 2.Sbc5#
    • 1...Sc4
      • 2.Sbc5#
    • 1...Sd5
      • 2.Sbc5#
    • 1...Sa8
      • 2.Sbc5#
    • 1...Sc8
      • 2.Sbc5#
  • Tries
    • 1.Sb2+?
      • 1...Kxb4
        • 2.Qd6#
        • 2.Qf8#
      • 1...Ka3!
    • 1.Rf4?
      • threat
        • 2.Sdc5#
      • 1...Sc4
        • 2.Sbc5#
      • 1...e2!
    • 1.Qf4?
      • threat
        • 2.Sdc5#
      • 1...e2
        • 2.Sb2#
      • 1...Sc4!
    • 1.bxa6?
      • threat
        • 2.Ra5#
      • 1...Sd5
        • 2.Sbc5#
      • 1...Bb5
        • 2.Sbc5#
      • 1...Sc4
        • 2.Sbc5#
      • 1...Bf5!
  • Keys
    • 1.a3!
      • threat
        • 2.Sdc5#
      • 1...Kb3
        • 2.Sdc5#
      • 1...Sc4
        • 2.Sbc5#
      • 1...e2
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(d);OGATEB::QAR(L),XR(d)
    • B(f);SBLOCK,XP(I)::S(K)
    • S(e);::S(K)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(b)
    • Try
      • R(G);
      • Threat
        • S(F)
      • Vars
        • S(e);::S(K)
      • Refutation
        • P(b);
    • Try
      • Q(L);
      • Threat
        • S(F)
      • Vars
        • P(b);::S(F)
      • Refutation
        • S(e);
    • Try
      • P(I);XR(d)
      • Threat
        • R1(J)
      • Vars
        • S(e);::S(K)
        • B(f);SBLOCK::S(K)
      • Refutation
        • B(f);
  • Actual
    • P(D);
    • Threat
      • S(F)
    • Vars
      • K(c);P_PINP(D),S_FLIGHT::S(F)
      • S(e);::S(K)
      • P(b);::S(F)
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