MESON Chess Problem Database

Problem Display
PID: 174352 (n7/b4p2/qQ1N1Rr1/p1pk3r/R5B1/1P1P2B1/nKP5/3b4 w - - 0 1)

Gross, Erwin

5th Comm., Boletim da UBP, 1986-1987

n7/b4p2/qQ1N1Rr1/p1pk3r/R5B1/1P1P2B1/nKP5/3b4

#2

10 + 11

1077 Boletim da UBP 1989

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3
      • 2.Qb7#
    • 1...Qb7
      • 2.Qxb7#
    • 1...Bxc2
      • 2.Bf3#
    • 1...Bf3
      • 2.Bxf3#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Se3#
        • 2.Se7#
      • 1...Qxd3
        • 2.Se7#
        • 2.Qd8#
        • 2.Qc6#
        • 2.Qd6#
        • 2.Qb7#
      • 1...Rxf5
        • 2.Rxf5#
      • 1...Qc4
        • 2.Qd8#
        • 2.Qc6#
        • 2.Qd6#
        • 2.Qb7#
        • 2.bxc4#
      • 1...Qb7
        • 2.Se3#
        • 2.Qd6#
        • 2.Qxb7#
        • 2.c4#
      • 1...Sb4!
    • 1.Qxa6?
      • threat
        • 2.Qb7#
      • 1...c4
        • 2.Qxc4#
      • 1...Sb4!
    • 1.Qb7+?
      • 1...Qc6
        • 2.Qxf7#
      • 1...Qxb7!
  • Keys
    • 1.Sb5!
      • threat
        • 2.c4#
      • 1...Qxb5
        • 2.Qd6#
      • 1...Rxg4
        • 2.Rd6#
      • 1...Bxc2
        • 2.Bf3#
      • 1...Sxb6
        • 2.Sc7#
      • 1...Rh2
        • 2.Rf5#
      • 1...Sc3
        • 2.Sxc3#
      • 1...c4
        • 2.bxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(g);N_GUARD,XP(D)::QAB(H)
    • Q(g);N_GUARD::QAB(H),XQ(g)
    • B(a);N_GUARD,XP(B)::B(G)
    • B(a);N_GUARD::B(G),XB(a)
  • Tries
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • R(f);OGATE,XS(I)::R(J),XR(f)
      • Refutation
        • S(b);
    • Try
      • Q(H);XQ(g)
      • Threat
        • QAB(H)
      • Vars
        • P(d);::QAB1(H),XP(d)
      • Refutation
        • S(b);
    • Try
      • Q(H);CHECK
      • Vars
        • Q(g);P_SPINQ(g),SBLOCK::QAB(H),XP(j)
      • Refutation
        • Q(g);P_PINP(C),XQ(H)
  • Actual
    • S(I);
    • Threat
      • P(B)
    • Vars
      • Q(g);N_GUARD,P_PINP(C),XS(I)::QAR1(H)
      • R(h);N_GUARD,XB(G)::R1(J)
      • B(a);N_GUARD,XP(B)::B(G)
      • S(k);N_GUARD,XQ(H)::S(I)
      • R(f);N_GUARD,P_PINP(B)::R(J)
      • S(b);N_GUARD::S(I),XS(b)
      • P(d);OGATE::P(C),XP(d)
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