MESON Chess Problem Database

Problem Display
PID: 254346 (8/3rp3/RP6/Npk1B3/1pbp1N2/1P1PP3/2K5/2Q5 w - - 0 1)

Lebedev, Viacheslav Aleksandr

Die Schwalbe, 1930

8/3rp3/RP6/Npk1B3/1pbp1N2/1P1PP3/2K5/2Q5

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Se6#
    • 1...Ra7
      • 2.exd4#
    • 1...Rb7
      • 2.exd4#
    • 1...Rc7
      • 2.exd4#
    • 1...Bxb3+
      • 2.Kxb3#
    • 1...Bxd3+
      • 2.Kxd3#
    • 1...Bd5
      • 2.exd4#
  • Tries
    • 1.b7?
      • threat
        • 2.Rc6#
      • 1...Bxb3+
        • 2.Kxb3#
        • 2.Sxb3#
      • 1...Bxd3+
        • 2.Kxd3#
      • 1...Rc7
        • 2.Bxd4#
        • 2.exd4#
      • 1...Bd5
        • 2.Bxd4#
        • 2.exd4#
      • 1...Rd6!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qc6#
      • 1...Bxb3+
        • 2.Sxb3#
      • 1...Bxd3+
        • 2.Sxd3#
      • 1...Rd6
        • 2.Sb7#
      • 1...Rd5
        • 2.Se6#
      • 1...Rc7
        • 2.exd4#
      • 1...Bd5
        • 2.exd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(f);SBLOCK,S_CUTB(b)::S(F)
    • R(f);N_GUARD::P(E),XP(c)
    • B(b);CHECK,XP(C)::QAR(A)+K(B),XB(b)
    • B(b);CHECK,XP(D)::QAR(A)+K(B),XB(b)
    • B(b);S_CUTR(f)::P(E),XP(c)
  • Tries
    • Try
      • P(J);
      • Threat
        • R1(I)
      • Vars
        • B(b);CHECK,XP(D)::QAR(A)+K(B),XB(b)
      • Refutation
        • R(f);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(b);CHECK,XP(C)::S(G),XB(b)
      • B(b);CHECK,XP(D)::S(F),XB(b)
      • R(f);N_GUARD::S(G)
      • R(f);S_CUTB(b)::S(F)
      • R(f);N_GUARD::P(E),XP(c)
      • B(b);S_CUTR(f)::P(E),XP(c)
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