MESON Chess Problem Database

Problem Display
PID: 24107 (B4Q2/r1b1pp2/1p1k1N2/R1n3nR/1B1N4/3pK2p/8/7b w - - 0 1)

Levman, Semyon Semyonovich

2nd Prize, Els Escacs a Catalunya, 1936

B4Q2/r1b1pp2/1p1k1N2/R1n3nR/1B1N4/3pK2p/8/7b

#2

8 + 11

3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qxe7#
    • 1...Sf3
      • 2.Rd5#
    • 1...Se4
      • 2.Rd5#
    • 1...Se6
      • 2.Sb5#
  • Tries
    • 1.Se4+?
      • 1...Ke5
        • 2.Qxe7#
      • 1...Kd7
        • 2.Bc6#
      • 1...Sxe4
        • 2.Rd5#
      • 1...Bxe4!
    • 1.Se8+?
      • 1...Ke5
        • 2.Qxe7#
      • 1...Kd7!
    • 1.Bxc5+?
      • 1...Ke5
        • 2.Sg4#
        • 2.Sd7#
        • 2.Qxe7#
      • 1...bxc5!
    • 1.Qd8+?
      • 1...Ke5
        • 2.Sg4#
        • 2.Qxe7#
      • 1...Bxd8!
  • Keys
    • 1.Be1!
      • threat
        • 2.Bg3#
      • 1...Ke5
        • 2.Qxe7#
      • 1...Sce4
        • 2.Rd5#
      • 1...Sce6
        • 2.Sf5#
      • 1...Sd7
        • 2.Se8#
      • 1...Sf3
        • 2.Rd5#
      • 1...Sge4
        • 2.Rd5#
      • 1...Sge6
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(g);N_SPINP(j),S_FLIGHT::QAR2(H),XP(j)
    • S(e);OGATE::R1(E)
    • S(e);SBLOCK::S(C)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(g);N_SPINP(j),S_FLIGHT::QAR2(H),XP(j)
        • K(g);N_SPINP(j),N_SPINS(d),P-FLIGHT::B(G)
        • S(e);OGATE,XS(F)::R1(E)
      • Refutation
        • B(a);XS(F)
    • Try
      • S(F);CHECK
      • Vars
        • K(g);N_SPINP(j),S_FLIGHT::QAR2(H),XP(j)
      • Refutation
        • K(g);N_SPINP(j),N_SPINS(d),P-FLIGHT
    • Try
      • B(B);CHECK,XS(d)
      • Refutation
        • P(f);XB(B)
    • Try
      • Q(H);CHECK,N_PINP(j)
      • Refutation
        • B(i);XQ(H)
  • Actual
    • B(B);N_PINS(d)
    • Threat
      • B(B)
    • Vars
      • K(g);N_SPINP(j),P_SPINS(d),S_FLIGHT::QAR2(H),XP(j)
      • S(d);OGATE::R1(D)
      • S(d);SBLOCK::S(C)
      • S(d);SBLOCK::S(F)
      • S(e);OGATE::R1(E)
      • S(e);SBLOCK::S(C)
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