MESON Chess Problem Database

Problem Display
PID: 273443 (3RK3/b4P2/B1P1Q3/r3PpN1/3p1k2/2r4P/b2N2R1/2B5 w - - 0 1)

Lazdinits, Eriks

British Chess Magazine, 1934

3RK3/b4P2/B1P1Q3/r3PpN1/3p1k2/2r4P/b2N2R1/2B5

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Sf1#
    • 1...Rca3
      • 2.Sb3#
    • 1...Rb3
      • 2.Sxb3#
    • 1...Rf3
      • 2.Sdxf3#
    • 1...Rg3
      • 2.Sdf3#
    • 1...Rxh3
      • 2.Sdf3#
    • 1...Rc4
      • 2.Sxc4#
    • 1...Rcc5
      • 2.Sc4#
    • 1...Rxc6
      • 2.Sc4#
  • Tries
    • 1.Sde4+?
      • 1...Re3
        • 2.Rf2#
      • 1...Rxc1!
    • 1.Qxf5+?
      • 1...Ke3
        • 2.Sf1#
        • 2.Sc4#
        • 2.Re2#
        • 2.Rg3#
        • 2.Qe4#
        • 2.Qf2#
        • 2.Qf3#
      • 1...Kxf5!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Sgf3#
      • 1...Rxe5+
        • 2.Se6#
      • 1...Bxf7+
        • 2.Sxf7#
      • 1...Ke3
        • 2.Sf1#
      • 1...Kxe5
        • 2.Qd6#
      • 1...Rxh3
        • 2.Sdf3#
      • 1...Rxc6
        • 2.Sc4#
      • 1...Rf3
        • 2.Sdxf3#
        • 2.Sgxf3#
      • 1...Rg3
        • 2.Sdf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • K(d);S_FLIGHT::B(A)+S(B),DCHECK
    • R(b);N_GUARD::B(A)+S(B)
    • R(b);N_GUARD::B(A)+S(B),XR(b)
    • R(b);N_GUARD,XP(D)::B(A)+S(B)
    • R(b);N_GUARD,XP(H)::B(A)+S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(b);P_SPINR(b)::R(C)
      • Refutation
        • R(b);XB(A)
    • Try
      • Q(I);CHECK,XP(f)
      • Refutation
        • K(d);P-FLIGHT,XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+S(F)
    • Vars
      • R(e);CHECK,SBLOCK,XP(E)::QAB(I)+S(F),DCHECK
      • B(a);CHECK,XP(J)::QAB(I)+S(F),XB(a)
      • K(d);N_GUARD,S_FLIGHT::B(A)+S(B),DCHECK
      • K(d);OGATEB,S_FLIGHT,XP(E)::QAB1(I)
      • R(b);N_GUARD,XP(D)::B(A)+S(B)
      • R(b);N_GUARD,XP(H)::B(A)+S(B)
      • R(b);N_GUARD::B(A)+S(B)
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