MESON Chess Problem Database

Problem Display
PID: 42056 (qb6/2P5/3N1K2/2p5/3k1N1B/p1p1pn2/3P4/3Q1bnB w - - 0 1)

Valuska, Jan

Pravda, 1984

qb6/2P5/3N1K2/2p5/3k1N1B/p1p1pn2/3P4/3Q1bnB

#2

8 + 10

3748 FIDE Album (1983-1985) 1992

SOLUTION

  • SOUND
  • Sets
    • 1...cxd2
      • 2.Qa1#
    • 1...c2
      • 2.Qa1#
    • 1...exd2
      • 2.Bf2#
    • 1...e2
      • 2.Bf2#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qxc3#
        • 2.dxc3#
      • 1...Sxd2
        • 2.Se6#
      • 1...cxd2
        • 2.Sf5#
      • 1...exd2
        • 2.Bf2#
      • 1...Qa5
        • 2.Qe4#
      • 1...Se2
        • 2.Qd3#
      • 1...e2
        • 2.Bf2#
        • 2.Qd3#
        • 2.Qxc3#
      • 1...c4!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qxc3#
        • 2.dxc3#
      • 1...Sxd2
        • 2.Sf5#
      • 1...cxd2
        • 2.Se6#
      • 1...exd2
        • 2.Bf2#
      • 1...c4
        • 2.Qb6#
      • 1...Qa5
        • 2.Qd5#
      • 1...Se2
        • 2.Qc4#
      • 1...c2
        • 2.Se6#
        • 2.Qc3#
        • 2.Qxe3#
        • 2.dxe3#
      • 1...e2
        • 2.Bf2#
        • 2.Qc4#
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • P(d);OGATEB,P_SPINP(d),XP(C)::QAB(A)
    • P(d);OGATEB::QAB(A)
    • P(e);OGATEB,P_SPINP(e),XP(C)::B(E)
    • P(e);OGATEB::B(E)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);XP(C)::S(D)
        • P(d);XP(C)::S(F)
        • P(e);OGATEB,XP(C)::B(E)
        • Q(i);N_GUARD::QAR1(A)
        • S(b);S_CUTB(a)::QAR1(A)
      • Refutation
        • P(h);
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • S(f);XP(C)::S(F)
      • P(d);XP(C)::S(D)
      • P(e);OGATEB,XP(C)::B(E)
      • P(h);OGATEB::QAB(A)
      • Q(i);N_GUARD::QAR1(A)
      • S(b);S_CUTB(a)::QAR1(A)
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