MESON Chess Problem Database

Problem Display
PID: 42845 (3KR2Q/6p1/2PB4/4P1N1/1NPk2p1/2R5/1PP1qb2/5r2 w - - 0 1)

Pachl, Franz

Hlas l'udu, 1978

3KR2Q/6p1/2PB4/4P1N1/1NPk2p1/2R5/1PP1qb2/5r2

#2

12 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc2
      • 2.Sxc2#
    • 1...Qe4
      • 2.Se6#
  • Tries
    • 1.Sa6?
      • threat
        • 2.Bc5#
      • 1...Qxe5
        • 2.Bxe5#
      • 1...Qxc4!
    • 1.Qxg7?
      • threat
        • 2.Qa7#
      • 1...Qxc4
        • 2.e6#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Ra1!
    • 1.Qh7?
      • threat
        • 2.Se6#
      • 1...Qxc4
        • 2.Qe4#
      • 1...Qxe5
        • 2.Qd3#
      • 1...Qd3
        • 2.Qxd3#
      • 1...g6
        • 2.Qa7#
      • 1...Bh4!
    • 1.Qg8?
      • threat
        • 2.Qd5#
      • 1...Qxc4
        • 2.Qxc4#
      • 1...Qxe5
        • 2.Rd3#
      • 1...Qd3
        • 2.Rxd3#
      • 1...Qe4
        • 2.Se6#
      • 1...Qf3!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Bc5#
      • 1...Qxc4
        • 2.Qf4#
      • 1...Qxe5
        • 2.Bxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);XP(B)::S(D),XQ(b)
    • Q(b);SBLOCK::S(G)
  • Tries
    • Try
      • S(D);
      • Threat
        • B(I)
      • Vars
        • Q(b);OGATE,XP(F)::B(I),XQ(b)
      • Refutation
        • Q(b);XP(E)
    • Try
      • Q(L);XP(f)
      • Threat
        • QAB(L)
      • Vars
        • Q(b);N_GUARD,XP(E)::QAB(L)+P(F)
        • Q(b);OGATE,P_SPINQ(b),XP(F)::QAB1(L),XQ(b)
      • Refutation
        • R(a);
    • Try
      • Q(L);
      • Threat
        • S(G)
      • Vars
        • Q(b);N_GUARD,XP(E)::QAR1(L)
        • Q(b);N_GUARD,XP(F)::QAR1(L)
        • Q(b);N_GUARD::QAR1(L),XQ(b)
        • P(f);OGATE::QAB(L)
      • Refutation
        • B(c);P_PINS(G)
    • Try
      • Q(L);
      • Threat
        • QAR1(L)
      • Vars
        • Q(b);OGATE,XP(E)::QAR1(L),XQ(b)
        • Q(b);N_GUARD,XP(F)::R1(C)
        • Q(b);N_GUARD::R1(C),XQ(b)
        • Q(b);SBLOCK::S(G)
      • Refutation
        • Q(b);
  • Actual
    • Q(L);
    • Threat
      • B(I)
    • Vars
      • Q(b);N_GUARD,XP(E)::QAR2(L)
      • Q(b);OGATE,XP(F)::B(I),XQ(b)
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