MESON Chess Problem Database

Problem Display
PID: 55094 (R3n2K/7b/2R2p2/1p3rB1/1k1N4/2b5/BN1q4/4Q3 w - - 0 1)

Brabec, Juraj

2/3 Prize, Shakhmaty v SSSR, 1962

R3n2K/7b/2R2p2/1p3rB1/1k1N4/2b5/BN1q4/4Q3

#2

8 + 8

3747 FIDE Album (1962-1964) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sd3#
    • 1...Qxe1
      • 2.Sd3#
      • 2.Sc2#
    • 1...Qe3
      • 2.Sc2#
    • 1...Qf4
      • 2.Sd3#
      • 2.Sc2#
      • 2.Qxc3#
    • 1...Qxg5
      • 2.Sd3#
      • 2.Sc2#
      • 2.Qxc3#
    • 1...Qd1
      • 2.Qxc3#
    • 1...Qc2
      • 2.Sxc2#
    • 1...Qe2
      • 2.Qxc3#
    • 1...Qf2
      • 2.Sd3#
      • 2.Qxc3#
    • 1...Qg2
      • 2.Sd3#
      • 2.Qxc3#
    • 1...Qh2
      • 2.Sd3#
      • 2.Qxc3#
    • 1...Qd3
      • 2.Sxd3#
    • 1...Bxb2
      • 2.Sc2#
    • 1...Bxd4
      • 2.Sd3#
  • Tries
    • 1.Qe4?
      • threat
        • 2.Sc2#
      • 1...Qxd4
        • 2.Sd3#
      • 1...Bxd4
        • 2.Bxd2#
      • 1...Qc2
        • 2.Sxc2#
      • 1...fxg5!
    • 1.Qe7+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...Sd6!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Sd3#
      • 1...Qxb2
        • 2.Sc2#
      • 1...Bxb2
        • 2.Bxd2#
      • 1...Qd3
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD,P_SPINB(b)::S(C)
    • Q(a);N_GUARD,P_SPINB(b)::S(D)
    • Q(a);OGATE,P_SPINB(b)::QAB1(A),XB(b)
    • Q(a);N_GUARD,P_SPINB(b)::S(D),XQ(a)
    • Q(a);N_GUARD,P_SPINB(b)::S(C),XQ(a)
    • B(b);P_SPINQ(a),XS(C)::S(D)
    • B(b);P_SPINQ(a),XS(D)::S(C)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)+S(D),DCHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a),XS(D)::S(C)
        • B(b);OGATEB,P_SPINB(b),XS(D)::B(E),XQ(a)
        • Q(a);::QAR(A)+S(D),DCHECK,XQ(a)
      • Refutation
        • P(f);P_PINS(D),XB(E)
    • Try
      • Q(A);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(A),XR(e)
      • Refutation
        • S(h);P_SPINS(h)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+S(C),DCHECK
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XS(C)::S(D)
      • B(b);OGATEB,P_SPINB(b),XS(C)::B(E),XQ(a)
      • Q(a);::QAR(A)+S(C),DCHECK,XQ(a)
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Developed and maintained by Brian Stephenson.
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