MESON Chess Problem Database

Problem Display
PID: 244167 (4Q3/2b1rq2/K2nPp1R/1B1p1k2/3B1Pp1/p4R1p/4NN2/3r1b2 w - - 0 1)

Brabec, Juraj

Pravda, 1966

4Q3/2b1rq2/K2nPp1R/1B1p1k2/3B1Pp1/p4R1p/4NN2/3r1b2

#2

10 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Bd7#
    • 1...Qh5
      • 2.Rxf6#
    • 1...Qxe6
      • 2.Sg3#
      • 2.Rh5#
      • 2.Qh5#
      • 2.Qg6#
    • 1...Qxe8
      • 2.Rxf6#
    • 1...Qg8
      • 2.Rxf6#
    • 1...Qh7
      • 2.Rxf6#
    • 1...Rxd4
      • 2.Sxd4#
    • 1...Rxe6
      • 2.Sg3#
    • 1...Rd7
      • 2.Sg3#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Qxd5#
      • 1...Kxe6
        • 2.f5#
      • 1...Qxe6
        • 2.Sg3#
      • 1...Rxd4
        • 2.Sxd4#
      • 1...Rxe6
        • 2.Sg3#
      • 1...Sxb5
        • 2.Sg3#
      • 1...Sc4
        • 2.Sg3#
      • 1...Sb7
        • 2.Sg3#
      • 1...Sc8
        • 2.Sg3#
      • 1...Se8
        • 2.Sg3#
      • 1...Se4!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qxg4#
      • 1...Kxe6
        • 2.Rxf6#
      • 1...Qxg8
        • 2.Rxf6#
      • 1...gxf3
        • 2.Qg4#
      • 1...Qh5
        • 2.Sg3#
        • 2.Rxh5#
        • 2.Rxf6#
      • 1...Qg6
        • 2.Sg3#
      • 1...Qg7
        • 2.Sg3#
      • 1...g3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • K(g);OGATEB,P_SPINP(i),P_SPINR(k),S_FLIGHT,XP(H)::B(F)
    • Q(l);N_GUARD::R1(I),XP(i)
    • Q(l);N_GUARD,XQ(J)::R1(I),XP(i)
    • R(a);XB(D)::S(A),XR(a)
    • R(k);XP(H)::S(A)
    • R(k);::S(A)
  • Tries
    • Try
      • Q(J);
      • Threat
        • QAR2(J),XP(f)
      • Vars
        • K(g);OGATE,P_SPINP(i),P_SPINS(h),S_FLIGHT,XP(H)::P(E)
        • Q(l);SBLOCK,XP(H)::S(A)
        • R(a);XB(D)::S(A),XR(a)
        • R(k);SBLOCK,XP(H)::S(A)
        • S(h);XB(F)::S(A)
        • S(h);::S(A)
      • Refutation
        • S(h);
  • Actual
    • Q(J);
    • Threat
      • QAB1(J),XP(e)
    • Vars
      • K(g);P_SPINP(i),P_SPINQ(l),S_FLIGHT,XP(H)::R1(I),XP(i)
      • Q(l);N_GUARD,XQ(J)::R1(I),XP(i)
      • P(e);XR(C)::QAB1(J)
      • Q(l);::S(A)
      • P(e);::QAB1(J)
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