MESON Chess Problem Database

Problem Display
PID: 210185 (8/1Qn5/1np1p3/2p3R1/2P1kN1p/q1b1P1pR/4P1K1/5N2 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Springaren, 1989

8/1Qn5/1np1p3/2p3R1/2P1kN1p/q1b1P1pR/4P1K1/5N2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Qb1#
    • 1...Sxc4
      • 2.Qb1#
    • 1...Sbd5
      • 2.Qb1#
    • 1...Sd7
      • 2.Qb1#
    • 1...Sba8
      • 2.Qb1#
    • 1...Sc8
      • 2.Qb1#
    • 1...Sb5
      • 2.Qh7#
    • 1...Scd5
      • 2.Qh7#
    • 1...Sa6
      • 2.Qh7#
    • 1...Sca8
      • 2.Qh7#
    • 1...Se8
      • 2.Qh7#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Rxh4#
      • 1...Be5
        • 2.Rxe5#
      • 1...Scd5
        • 2.Qh7#
      • 1...Sbd5!
    • 1.Sh5?
      • threat
        • 2.Rxh4#
      • 1...Sbd5
        • 2.Qb1#
      • 1...Scd5
        • 2.Qh7#
      • 1...Be5!
    • 1.Sxe6?
      • threat
        • 2.Rxh4#
      • 1...Sxe6
        • 2.Qh7#
      • 1...Sbd5
        • 2.Qb1#
      • 1...Scd5
        • 2.Qh7#
      • 1...Be5!
    • 1.Sg6?
      • threat
        • 2.Rxh4#
      • 1...Be5
        • 2.Rxe5#
      • 1...Sbd5
        • 2.Qb1#
      • 1...Scd5!
    • 1.Rxh4?
      • threat
        • 2.Sd3#
        • 2.Sh3#
        • 2.Sd5#
        • 2.Sh5#
        • 2.Sxe6#
        • 2.Sg6#
      • 1...Sbd5
        • 2.Sxd5#
        • 2.Qb1#
      • 1...Scd5
        • 2.Sxd5#
        • 2.Qh7#
      • 1...e5
        • 2.Sd3#
        • 2.Sh3#
        • 2.Sd5#
        • 2.Sh5#
        • 2.Se6#
        • 2.Sg6#
      • 1...Be5!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Rxh4#
      • 1...Sbxd5
        • 2.Qb1#
      • 1...Scxd5
        • 2.Qh7#
      • 1...Be5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • S(g);OGATE::QAB(I)
    • S(g);OGATE,XP(F)::QAB(I)
    • S(g);N_SPINP(h),OGATE::QAB(I)
    • S(j);OGATE::QAB(I)
    • S(j);N_SPINP(h),OGATE::QAB(I)
  • Tries
    • Try
      • S(G);
      • Threat
        • R(E),XP(e)
      • Vars
        • B(b);N_GUARD::R1(H),XB(b)
        • S(j);N_SPINP(h),OGATE::QAB(I)
      • Refutation
        • S(g);N_SPINP(h)
    • Try
      • S(G);
      • Threat
        • R(E),XP(e)
      • Vars
        • S(g);N_SPINP(h),OGATE::QAB(I)
        • S(j);N_SPINP(h),OGATE::QAB(I)
      • Refutation
        • B(b);
    • Try
      • S(G);XP(i)
      • Threat
        • R(E),XP(e)
      • Vars
        • S(j);OGATE,XS(G)::QAB(I)
        • S(g);N_SPINP(h),OGATE::QAB(I)
        • S(j);N_SPINP(h),OGATE::QAB(I)
      • Refutation
        • B(b);
    • Try
      • S(G);
      • Threat
        • R(E),XP(e)
      • Vars
        • B(b);N_GUARD::R1(H),XB(b)
        • S(g);N_SPINP(h),OGATE::QAB(I)
      • Refutation
        • S(j);N_SPINP(h)
    • Try
      • R(E);XP(e)
      • Threat
        • DUALS(6)
      • Refutation
        • B(b);
  • Actual
    • S(G);N_PINP(h)
    • Threat
      • R(E),XP(e)
    • Vars
      • S(g);OGATE,XS(G)::QAB(I)
      • S(j);OGATE,XS(G)::QAB(I)
      • B(b);N_GUARD::S(A)
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