MESON Chess Problem Database

Problem Display
PID: 135335 (b7/4rp2/1pp3PK/n7/1B1kPQ2/6pR/r1R4b/3N1B2 w - - 0 1)

Laib, Kurt Friedrich

6th Prize, Schach-Echo, 1979

b7/4rp2/1pp3PK/n7/1B1kPQ2/6pR/r1R4b/3N1B2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rd2#
    • 1...Ra4
      • 2.Rd2#
    • 1...Rxe4
      • 2.Qd6#
    • 1...Re5
      • 2.Qe3#
    • 1...Sb3
      • 2.Rc4#
    • 1...Sc4
      • 2.Rxc4#
    • 1...Sb7
      • 2.Rc4#
    • 1...g2
      • 2.Rd3#
    • 1...b5
      • 2.Bc5#
    • 1...c5
      • 2.Bc3#
  • Tries
    • 1.Bxe7?
      • threat
        • 2.Bf6#
      • 1...Sc4
        • 2.Rxc4#
      • 1...f6
        • 2.Bxf6#
      • 1...Rxc2!
    • 1.Rc5?
      • threat
        • 2.Qe3#
        • 2.e5#
      • 1...Rxe4
        • 2.Qd6#
      • 1...bxc5
        • 2.Bc3#
      • 1...Ra3
        • 2.e5#
      • 1...Rf2
        • 2.Qe3#
      • 1...Re5
        • 2.Qe3#
        • 2.Qxe5#
      • 1...Bg1
        • 2.e5#
      • 1...Sc4
        • 2.Rxc4#
        • 2.e5#
      • 1...g2
        • 2.Rd3#
        • 2.Qe3#
      • 1...Re2!
  • Keys
    • 1.Sc3!
      • threat
        • 2.e5#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Re5
        • 2.Qd2#
      • 1...g2
        • 2.Se2#
      • 1...c5
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::R(C)
    • R(h);P_SPINR(h),SBLOCK,XP(F)::QAR2(G)
    • R(h);SBLOCK::QAB1(G)
    • S(e);N_GUARD::R1(C)
    • S(e);N_GUARD::R1(C),XS(e)
    • P(c);OGATE::R1(D)
    • P(f);N_GUARD::B(E)
    • P(g);SBLOCK::B(E)
  • Tries
    • Try
      • B(E);XR(h)
      • Threat
        • B(E)
      • Vars
        • S(e);N_GUARD::R1(C),XS(e)
        • P(i);::B(E),XP(i)
      • Refutation
        • R(a);XR(C)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);P_SPINR(h),SBLOCK,XP(F)::QAR2(G)
        • P(f);SBLOCK,XR(C)::B(E)
        • R(a);::QAR(G)+P(F)
        • R(a);::QAB1(G)
        • B(b);::QAR(G)+P(F)
      • Refutation
        • R(a);
  • Actual
    • S(A);
    • Threat
      • QAR(G)+P(F)
    • Vars
      • R(h);OGATE,P_SPINR(h),XP(F)::QAR1(G),XR(h)
      • R(h);SBLOCK::QAR2(G)
      • P(c);::S(A)
      • P(g);N_GUARD::S(A)
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