MESON Chess Problem Database

Problem Display
PID: 185290 (8/8/7r/1Q1B3p/2NknN1K/8/2R5/4r2b w - - 0 1)

Dittrich, Stefan

Muller, Dieter

1st Prize, Suomen Shakki, 1978

8/8/7r/1Q1B3p/2NknN1K/8/2R5/4r2b

#2

6 + 6

117 Suomen Shakki 1981

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Rd2#
    • 1...Sc5
      • 2.Qb2#
    • 1...Sd6
      • 2.Qb6#
    • 1...Sf6
      • 2.Qb6#
  • Tries
    • 1.Bxe4?
      • threat
        • 2.Qd5#
        • 2.Qe5#
      • 1...Rxe4
        • 2.Qd5#
      • 1...Bxe4
        • 2.Qe5#
      • 1...Rd6
        • 2.Qe5#
      • 1...Re6
        • 2.Qd5#
      • 1...Kxe4!
    • 1.Rd2+?
      • 1...Kc3
        • 2.Qb2#
      • 1...Sxd2!
    • 1.Qb6+?
      • 1...Sc5
        • 2.Qb2#
      • 1...Rxb6!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Qd5#
        • 2.Qe5#
      • 1...Rd6
        • 2.Qe5#
      • 1...Re6
        • 2.Qd5#
      • 1...Sd2
        • 2.Qb6#
      • 1...Sf2
        • 2.Qb6#
      • 1...Sc3
        • 2.Rd2#
      • 1...Sg3
        • 2.Qb6#
      • 1...Sc5
        • 2.Qb2#
      • 1...Sg5
        • 2.Qb6#
      • 1...Sd6
        • 2.Qb6#
      • 1...Sf6
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD,SBLOCK::R(A)
    • S(d);N_GUARD,SBLOCK::QAB(E)
    • S(d);N_GUARD,S_CUTR(f)::QAB(E)
  • Tries
    • Try
      • B(F);XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);P_PINS(C),XB(F)::QAR1(E)
        • B(b);XB(F)::QAB1(E)
        • R(f);::QAB1(E)
        • R(f);::QAR1(E)
      • Refutation
        • K(c);P-FLIGHT,XB(F)
    • Try
      • R(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
      • Refutation
        • S(d);XR(A)
    • Try
      • Q(E);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d),SBLOCK::QAB(E)
      • Refutation
        • R(f);XQ(E)
  • Actual
    • B(F);
    • Threat
      • DUALS(2)
    • Vars
      • R(f);::QAB1(E)
      • R(f);::QAR1(E)
      • S(d);N_GUARD::QAB(E)
      • S(d);N_GUARD,SBLOCK::R(A)
      • S(d);N_GUARD,SBLOCK::QAB(E)
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