MESON Chess Problem Database

Problem Display
PID: 276438 (B1qn3Q/b5p1/2npP1p1/3k2P1/NprP2R1/1Kp3B1/5PN1/4R3 w - - 0 1)

Dolginovich, Nikolai Osipovich

Mat, 1981

B1qn3Q/b5p1/2npP1p1/3k2P1/NprP2R1/1Kp3B1/5PN1/4R3

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Sf4#
    • 1...Bb6
      • 2.Sxb6#
    • 1...Bb8
      • 2.Sb6#
    • 1...Sxe6
      • 2.Se3#
  • Tries
    • 1.Qxg7?
      • threat
        • 2.Sf4#
      • 1...Sxe6
        • 2.Se3#
      • 1...Rxd4!
    • 1.Qe8?
      • threat
        • 2.Se3#
      • 1...Bxd4
        • 2.Sf4#
      • 1...Qxe6!
    • 1.Qg8?
      • threat
        • 2.Se3#
      • 1...Bxd4
        • 2.Sf4#
      • 1...Sf7!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Sh4#
      • 1...Qxe6
        • 2.Se3#
      • 1...Rxd4
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(h);SBLOCK,XP(G)::S(C)
    • B(h);N_GUARD::S(F),XB(h)
    • B(h);N_GUARD::S(F)
    • S(k);SBLOCK,XP(J)::S(C)
  • Tries
    • Try
      • Q(L);XP(i)
      • Threat
        • S(C)
      • Vars
        • S(k);SBLOCK,XP(J)::S(C)
      • Refutation
        • R(c);XP(G)
    • Try
      • Q(L);
      • Threat
        • S(C)
      • Vars
        • B(h);SBLOCK,XP(G)::S(C)
      • Refutation
        • Q(j);XP(J)
    • Try
      • Q(L);
      • Threat
        • S(C)
      • Vars
        • B(h);SBLOCK,XP(G)::S(C)
      • Refutation
        • S(k);
  • Actual
    • Q(L);
    • Threat
      • QAB(L)+S(C)
    • Vars
      • Q(j);SBLOCK,XP(J)::QAB(L)+S(C),DCHECK
      • R(c);SBLOCK,XP(G)::QAB(L)+S(C),DCHECK
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