MESON Chess Problem Database

Problem Display
PID: 245370 (8/pKnN2p1/3p4/1pPk1P2/2pPp3/2P5/3Q4/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Schach, 1982

8/pKnN2p1/3p4/1pPk1P2/2pPp3/2P5/3Q4/8

#2

7 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Qg2#
    • 1...dxc5
      • 2.dxc5#
    • 1...a5
      • 2.Sb6#
    • 1...a6
      • 2.Sb6#
    • 1...g5
      • 2.Sf6#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Kxc7?
      • 1...dxc5
        • 2.dxc5#
      • 1...e3
        • 2.Qg2#
      • 1...a5
        • 2.Sb6#
      • 1...a6
        • 2.Sb6#
      • 1...g5
        • 2.Sf6#
      • 1...g6
        • 2.Sf6#
      • 1...b4!
    • 1.Qf4?
      • threat
        • 2.Qxd6#
      • 1...dxc5
        • 2.Qe5#
      • 1...e3
        • 2.Qf3#
      • 1...Se8!
    • 1.Qh2?
      • threat
        • 2.Qxd6#
      • 1...dxc5
        • 2.Qe5#
      • 1...e3
        • 2.Qh1#
        • 2.Qg2#
      • 1...Se8!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Qxd6#
      • 1...dxc5
        • 2.Qc6#
      • 1...gxh6
        • 2.Sf6#
      • 1...e3
        • 2.Qh1#
      • 1...Se6
        • 2.Qxe6#
      • 1...Se8
        • 2.Qe6#
      • 1...g6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • P(b);OGATEB::QAB(A)
    • P(e);OGATE,XP(D)::QAR(A)+P(C),XP(e)
    • P(f);N_GUARD::S(G)
    • P(h);N_GUARD::S(G)
  • Tries
    • Try
      • K(F);P-FLIGHT,XS(g)
      • Vars
        • P(e);OGATE,XP(D)::QAR(A)+P(C),XP(e)
        • P(b);OGATEB::QAB(A)
        • P(f);N_GUARD::S(G)
        • P(h);N_GUARD::S(G)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(e)
      • Vars
        • P(e);N_GUARD,XP(D)::QAR1(A)
        • P(b);OGATEB::QAB(A)
      • Refutation
        • S(g);
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(e)
      • Vars
        • P(e);N_GUARD,XP(D)::QAR1(A)
      • Refutation
        • S(g);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(e)
    • Vars
      • P(e);OGATE,XP(D)::QAB1(A)
      • P(h);N_GUARD,XQ(A)::S(G)
      • P(b);OGATEB::QAB(A)
      • S(g);N_GUARD::QAB1(A),XS(g)
      • S(g);N_GUARD::QAB1(A)
      • P(h);N_GUARD::S(G)
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