MESON Chess Problem Database

Problem Display
PID: 204958 (4br2/3Nqn1p/R2bp1N1/3k2n1/1Pp2p2/2PP1p2/3Q3K/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Phenix, 1995

4br2/3Nqn1p/R2bp1N1/3k2n1/1Pp2p2/2PP1p2/3Q3K/8

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qf6
      • 2.Sxf6#
    • 1...Bxb4
      • 2.Sxf4#
    • 1...Bc5
      • 2.Sxf4#
    • 1...Be5
      • 2.Sxe7#
    • 1...Bc7
      • 2.Sxe7#
    • 1...Bb8
      • 2.Sxe7#
    • 1...cxd3
      • 2.Qxd3#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qd4#
      • 1...Qf6
        • 2.Sxf6#
      • 1...Bc5
        • 2.Sxf4#
      • 1...Be5
        • 2.Sxe7#
      • 1...e5!
  • Keys
    • 1.Qxf4!
      • threat
        • 2.dxc4#
      • 1...Bxf4+
        • 2.Sxf4#
      • 1...cxd3
        • 2.c4#
      • 1...e5
        • 2.Qxc4#
      • 1...Se4
        • 2.dxe4#
      • 1...Se5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(h);N_GUARD::S(H),XQ(h)
    • B(f);N_GUARD,XP(E)::S(G),XP(c)
    • B(f);N_GUARD::S(G),XP(c)
    • B(f);N_GUARD::S(G),XQ(h)
    • P(b);OGATE,P_SPINP(b),XP(D)::QAR2(A),XP(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(h);N_GUARD::S(H),XQ(h)
        • B(f);N_GUARD::S(G),XP(c)
        • B(f);N_GUARD::S(G),XQ(h)
      • Refutation
        • P(g);
  • Actual
    • Q(A);P_SPINQ(A),XP(c)
    • Threat
      • P(D),XP(b)
    • Vars
      • B(f);CHECK,XQ(A)::S(G),XB(f)
      • P(b);OGATE,XP(D)::P(C)
      • P(g);N_PINQ(A)::QAB1(A),XP(b)
      • S(e);OGATE::P(D),XS(e)
      • S(i);N_PINQ(A)::QAR1(A)
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