MESON Chess Problem Database

Problem Display
PID: 250651 (1Bb3N1/6p1/5p2/3k1nQ1/2R4n/b2P3K/8/4RN2 w - - 0 1)

Ulanov, Leonid

Schweizerische Schachzeitung, 1998

1Bb3N1/6p1/5p2/3k1nQ1/2R4n/b2P3K/8/4RN2

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Se7#
    • 1...Bb2
      • 2.Se7#
    • 1...Be7
      • 2.Sxe7#
    • 1...Be6
      • 2.Se3#
    • 1...Sg2
      • 2.Qxg2#
    • 1...Sg6
      • 2.Qg2#
    • 1...fxg5
      • 2.Re5#
    • 1...g6
      • 2.Sxf6#
  • Tries
    • 1.Qg2+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sxg2!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qe4#
      • 1...Se3
        • 2.Sxe3#
      • 1...Sg3
        • 2.Se3#
      • 1...Sd4
        • 2.Se3#
      • 1...Sd6
        • 2.Se7#
      • 1...Sh6
        • 2.Se3#
      • 1...Se7
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 8
  • Sets
    • B(a);N_GUARD::S(H)
    • B(a);N_GUARD::S(H),XB(a)
    • B(g);SBLOCK::S(B)
    • S(b);N_GUARD::QAB(F),XS(b)
    • S(b);N_GUARD::QAB(F)
    • P(e);N_GUARD,N_SPINS(d),XQ(F)::R1(A)
    • P(f);N_GUARD::S(H),XP(e)
  • Tries
    • Try
      • Q(F);CHECK,N_PINS(d)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(F),XS(b)
      • Refutation
        • S(b);XQ(F)
  • Actual
    • Q(F);N_PINS(d)
    • Threat
      • QAB1(F)
    • Vars
      • S(d);N_GUARD,P_PINQ(F)::S(B),XS(d)
      • S(d);N_GUARD,P_PINQ(F)::S(B)
      • S(d);N_GUARD,P_PINQ(F),S_CUTB(a)::S(H)
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