MESON Chess Problem Database

Problem Display
PID: 225076 (2R5/5pK1/rpN5/2k5/p2N1Bpn/7r/Bn6/bQ1R4 w - - 0 1)

Levman, Semyon Semyonovich

2nd Prize, Arbejder-Skak, 1935

2R5/5pK1/rpN5/2k5/p2N1Bpn/7r/Bn6/bQ1R4

#2

8 + 10

2048 Tuxens skakopgaver (Leif C Schmidt) 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd1
      • 2.Qb4#
      • 2.Qb5#
    • 1...Sd3
      • 2.Qb5#
    • 1...Sc4
      • 2.Sb4#
      • 2.Se7#
      • 2.Qb5#
    • 1...Sg2
      • 2.Qf5#
    • 1...Sf5+
      • 2.Qxf5#
  • Tries
    • 1.Se6+?
      • 1...Kb5
        • 2.Rd5#
      • 1...fxe6!
    • 1.Se5+?
      • 1...Kd6
        • 2.Sf5#
      • 1...Kb4!
    • 1.Rc1+?
      • 1...Sc4
        • 2.Qb5#
      • 1...Rc3!
    • 1.Qc2+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Rc3!
    • 1.Qc1+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Rc3!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Rd5#
      • 1...Sxd1+
        • 2.Scd4#
      • 1...Sd3+
        • 2.Scd4#
      • 1...Sc4+
        • 2.Sce5#
      • 1...Sf5+
        • 2.Qxf5#
      • 1...Kb5
        • 2.Rd5#
      • 1...b5
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(b);OGATE,P_PINS(D)::QAR1(A)
    • S(f);N_GUARD::QAR(A)
    • S(f);CHECK,N_GUARD::QAR(A),XS(f)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINS(b)::R(B)
      • Refutation
        • P(j);XS(D)
    • Try
      • S(F);CHECK
      • Vars
        • K(g);S_FLIGHT::R(B)+S(D),DCHECK
      • Refutation
        • K(g);P_SPINS(b),S_FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • S(b);OGATE,P_PINS(D),P_SPINS(b)::QAR1(A)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_PINS(D),P_SPINS(b)::QAR1(A),XS(b)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_PINS(D),P_SPINS(b)::QAR1(A),XS(b)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • S(D);
    • Threat
      • R1(B)
    • Vars
      • S(b);CHECK,XR(B)::R(H)+S(F)
      • S(b);CHECK::R(H)+S(F)
      • S(f);CHECK,N_GUARD::QAR(A),XS(f)
      • K(g);P-FLIGHT,P_SPINS(b)::R(B)
      • P(i);SBLOCK::B(E)
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