MESON Chess Problem Database

Problem Display
PID: 257979 (2Qn4/1N6/2nP4/1p1k4/1p2R1P1/1p1P4/1P1R1K2/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Astafyeva-30 JT (Kudesnik), 2021

2Qn4/1N6/2nP4/1p1k4/1p2R1P1/1p1P4/1P1R1K2/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Qc5#
    • 1...Sa5
      • 2.Qc5#
    • 1...Sa7
      • 2.Qc5#
    • 1...Se7
      • 2.Qc5#
    • 1...Sb8
      • 2.Qc5#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sf7
      • 2.Qe6#
  • Tries
    • 1.Ke3?
      • 1...Se5
        • 2.Rd4#
      • 1...Sd4
        • 2.Qc5#
      • 1...Sa5
        • 2.Qc5#
      • 1...Sa7
        • 2.Qc5#
      • 1...Se7
        • 2.Qc5#
      • 1...Sb8
        • 2.Qc5#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sf7
        • 2.Qe6#
      • 1...Sxb7!
    • 1.Rc2?
      • threat
        • 2.Rc5#
      • 1...Sxb7
        • 2.Qe6#
        • 2.Qxc6#
      • 1...Se6
        • 2.Qxe6#
        • 2.Qxc6#
      • 1...bxc2!
  • Keys
    • 1.d4!
      • 1...Kc4
        • 2.d5#
      • 1...Kxe4
        • 2.Qf5#
      • 1...Sxd4
        • 2.Rdxd4#
      • 1...Sxb7
        • 2.Qe6#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sa5
        • 2.Re5#
      • 1...Sa7
        • 2.Re5#
      • 1...Se7
        • 2.Re5#
      • 1...Sb8
        • 2.Re5#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sf7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 5
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(e);OGATE::QAR1(I)
    • S(f);N_GUARD::QAB1(I),XS(f)
    • S(f);N_GUARD::QAB1(I)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • S(e);N_GUARD,SBLOCK::R1(E)
        • S(e);OGATE::QAR1(I)
        • S(f);N_GUARD::QAB1(I),XS(f)
        • S(f);N_GUARD::QAB1(I)
      • Refutation
        • S(f);XS(H)
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Refutation
        • P(a);XR(B)
  • Actual
    • P(D);
    • Vars
      • K(d);OGATE,P_SPINS(e),S_FLIGHT::R(E)+P(D)
      • K(d);N_GUARD,S_CUTS(e),S_FLIGHT,XR(E)::QAB1(I)
      • S(e);OGATE,P_SPINS(e),XP(D)::R1(B),XS(e)
      • S(f);N_GUARD,XS(H)::QAB1(I)
      • S(e);N_GUARD::R1(E),XS(e)
      • S(e);N_GUARD::R1(E)
      • S(f);N_GUARD::QAB1(I),XS(f)
      • S(f);N_GUARD::QAB1(I)
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