MESON Chess Problem Database

Problem Display
PID: 135332 (6K1/2n2B2/1NpB1P2/6P1/1Rb1kr2/1rp3RQ/1nP1N1Pp/6b1 w - - 0 1)

Laib, Kurt Friedrich

Schach-Echo, 1981

6K1/2n2B2/1NpB1P2/6P1/1Rb1kr2/1rp3RQ/1nP1N1Pp/6b1

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rf2
      • 2.Re3#
    • 1...Rg4
      • 2.Qxg4#
      • 2.Qh7#
    • 1...Be3
      • 2.Rxe3#
    • 1...Sd3
      • 2.cxd3#
    • 1...Sb5
      • 2.Qe6#
    • 1...Sd5
      • 2.Qe6#
    • 1...Sa6
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
    • 1...Sa8
      • 2.Qe6#
    • 1...Se8
      • 2.Qe6#
  • Tries
    • 1.Bd5+?
      • 1...Sxd5
        • 2.Qe6#
      • 1...cxd5!
    • 1.Rf3?
      • threat
        • 2.Rxf4#
      • 1...Rxf3
        • 2.Qxf3#
      • 1...Rg4
        • 2.Qxg4#
        • 2.Qh7#
      • 1...Rh4
        • 2.Qf5#
        • 2.Qxh4#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Be3
        • 2.Rxe3#
      • 1...Sd3
        • 2.cxd3#
      • 1...Sd5
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Rxf6!
    • 1.Rxc4+?
      • 1...Bd4
        • 2.Re3#
        • 2.Rxd4#
      • 1...Sxc4!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Rxf4#
      • 1...Kf5
        • 2.Sg3#
      • 1...Rxg4
        • 2.Qf3#
      • 1...Be3
        • 2.Qh7#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sd5
        • 2.Bg6#
      • 1...Se6
        • 2.Bg6#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(h);S_CUTB(a)::R1(D)
    • B(a);N_GUARD::R1(D),XB(a)
    • S(b);OGATE::P(A),XS(b)
    • S(j);N_GUARD::QAR2(E)
    • S(j);N_GUARD,N_PINB(K)::QAR2(E)
    • S(j);N_GUARD,N_PINB(K)::QAR2(E),XS(j)
  • Tries
    • Try
      • B(K);CHECK
      • Vars
        • S(j);XB(K)::QAR2(E)
      • Refutation
        • P(i);XB(K)
    • Try
      • R(D);
      • Threat
        • R1(D),XR(h)
      • Vars
        • R(h);OGATE,XR(D)::QAB1(E),XR(h)
        • R(h);N_GUARD::QAB1(E),XR(h)
        • B(a);N_GUARD::R1(D),XB(a)
        • S(b);OGATE::P(A),XS(b)
        • S(j);N_GUARD,N_PINB(K)::QAR2(E)
        • S(j);N_GUARD,N_PINB(K)::QAR2(E),XS(j)
      • Refutation
        • R(h);XP(J)
    • Try
      • R(F);CHECK,N_SPINB(K),XB(f)
      • Refutation
        • S(b);XR(F)
  • Actual
    • R(D);P_PINR(h)
    • Threat
      • R1(D),XR(h)
    • Vars
      • K(g);N_SPINB(f),N_SPINR(h),S_FLIGHT::S(B)
      • R(h);N_SPINR(h),P_PINP(G),XR(D)::QAB1(E)
      • B(a);SBLOCK::QAB(E)
      • S(b);N_GUARD::QAB1(E),XS(b)
      • S(j);N_PINB(K)::B(K)
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