MESON Chess Problem Database

Problem Display
PID: 180070 (7Q/B3K3/5P1p/3NpRP1/1pp1k2P/4Np1B/2P2p2/3r4 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Tauber, Theodor

Variantim, 1993

7Q/B3K3/5P1p/3NpRP1/1pp1k2P/4Np1B/2P2p2/3r4

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.Sc3#
  • Tries
    • 1.Qa8?
      • threat
        • 2.Sc3#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...c3
        • 2.Sxc3#
      • 1...Rd4!
    • 1.f7?
      • threat
        • 2.Sf6#
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Rd4
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Rxd5!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Rxe5#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Rxd5
        • 2.Sxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(d);N_GUARD::S(E)
  • Tries
    • Try
      • Q(K);
      • Threat
        • QAB(K)+S(E),DCHECK
      • Vars
        • R(a);OGATE,P_SPINR(a),XS(E)::QAB1(K),XR(a)
        • P(e);::QAB(K)+S(E),DCHECK,XP(e)
      • Refutation
        • R(a);
    • Try
      • P(H);
      • Threat
        • DUALS(3)
      • Refutation
        • R(a);XS(E)
  • Actual
    • S(B);
    • Threat
      • R1(F),XP(g)
    • Vars
      • K(f);OGATEB,P_SPINP(g),S_FLIGHT,XS(E)::QAB(K)
      • K(f);OGATEB,S_FLIGHT,XR(F)::QAB(K)
      • R(a);SBLOCK,XS(E)::S(B),XP(b)
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