MESON Chess Problem Database

Problem Display
PID: 174421 (3R4/b1Qn1B1p/2P1N2B/2pP4/4k1Pp/2KnN3/6P1/3R4 w - - 0 1)

Bruch, Wieland

Degener, Udo

4th Prize, Israel Ring Ty., 1990

3R4/b1Qn1B1p/2P1N2B/2pP4/4k1Pp/2KnN3/6P1/3R4

#2

12 + 7

721 Variantim 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qf4#
    • 1...Se1
      • 2.Qf4#
    • 1...Sb2
      • 2.Qf4#
    • 1...Sf2
      • 2.Qf4#
    • 1...Sb4
      • 2.Qf4#
    • 1...Sf4
      • 2.Qxf4#
  • Tries
    • 1.Sf1?
      • threat
        • 2.Sg5#
      • 1...Kxd5
        • 2.Sg5#
      • 1...S7e5
        • 2.Sd2#
      • 1...S3e5!
    • 1.Sf5?
      • threat
        • 2.Sg5#
      • 1...Kxd5
        • 2.Sg5#
      • 1...S3e5
        • 2.Sd6#
      • 1...S7e5!
    • 1.Rxd3?
      • threat
        • 2.Sg5#
        • 2.Qf4#
      • 1...Bb8
        • 2.Sg5#
      • 1...Se5!
    • 1.Qg3?
      • threat
        • 2.Sg5#
      • 1...Sf4
        • 2.Qxf4#
      • 1...hxg3!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sg5#
      • 1...Kxd5
        • 2.Sg5#
      • 1...S3e5
        • 2.Sd6#
      • 1...S7e5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::QAR1(J)
    • S(a);N_GUARD::QAR1(J),XS(a)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(H)
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT,XP(F)::B(K)+S(H)
        • S(f);::S(D)
      • Refutation
        • S(a);
    • Try
      • S(D);
      • Threat
        • S(H)
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT,XP(F)::B(K)+S(H)
        • S(a);SBLOCK::S(D)
      • Refutation
        • S(f);
    • Try
      • R(A);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(e);::S(H)
      • Refutation
        • S(f);
    • Try
      • Q(J);
      • Threat
        • S(H)
      • Vars
        • S(a);N_GUARD::QAR1(J),XS(a)
      • Refutation
        • P(c);XQ(J)
  • Actual
    • S(D);
    • Threat
      • S(H)
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT,XP(F)::B(K)+S(H)
      • S(a);SBLOCK::S(D)
      • S(f);::S(D)
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Developed and maintained by Brian Stephenson.
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