MESON Chess Problem Database

Problem Display
PID: 78376 (5Q2/n1pr4/b7/B5p1/R1pk3r/3Nb1Rn/8/K6B w - - 0 1)

Boudantsev, Alex

3rd Comm., The Problemist, 1977/II

5Q2/n1pr4/b7/B5p1/R1pk3r/3Nb1Rn/8/K6B

#2

7 + 10

6329 Australian Chess 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Rd8
      • 2.Qxd8#
    • 1...Bc1
      • 2.Qc5#
      • 2.Qf6#
    • 1...Bg1
      • 2.Qc5#
      • 2.Qf6#
    • 1...Bd2
      • 2.Qc5#
      • 2.Qf6#
    • 1...Bf2
      • 2.Qc5#
      • 2.Qf6#
    • 1...Bf4
      • 2.Qc5#
  • Tries
    • 1.Qb4?
      • threat
        • 2.Qc3#
      • 1...Kxd3
        • 2.Qd2#
      • 1...Bd2
        • 2.Qc5#
      • 1...Sb5
        • 2.Qxc4#
      • 1...Re4!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxe3#
      • 1...Kxd3
        • 2.Qd1#
      • 1...Re4
        • 2.Qxe4#
      • 1...Re7
        • 2.Qd5#
      • 1...Bc1
        • 2.Qf6#
      • 1...Bg1
        • 2.Qf6#
      • 1...Bd2
        • 2.Qf6#
      • 1...Bf2
        • 2.Qf6#
      • 1...Bf4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(j);OGATEB::QAR(G),XR(j)
    • B(a);::QAB1(G)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • K(d);N_SPINP(c),OGATEB,P-FLIGHT,P_SPINB(a),XS(C)::QAR1(G)
        • B(a);::QAB1(G)
        • S(h);S_CUTB(g)::QAR1(G),XP(c)
      • Refutation
        • R(e);
  • Actual
    • Q(G);
    • Threat
      • QAB1(G),XB(a)
    • Vars
      • K(d);N_SPINP(c),OGATEB,P-FLIGHT,P_SPINB(a),XS(C)::QAR2(G)
      • R(e);N_GUARD::QAR1(G),XR(e)
      • R(j);N_GUARD::QAR1(G)
      • B(a);::QAB(G)
      • B(a);S_CUTR(e)::QAR1(G)
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