MESON Chess Problem Database

Problem Display
PID: 55260 (3BR3/1B1r2N1/Kp1Pp3/4kp1R/3n2p1/4p1q1/2N5/5Q2 w - - 0 1)

Brabec, Juraj

2nd Prize, Shakhmaty, 1964

3BR3/1B1r2N1/Kp1Pp3/4kp1R/3n2p1/4p1q1/2N5/5Q2

#2

9 + 9

3747 FIDE Album (1962-1964) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Rxe6#
    • 1...Sb3
      • 2.Rxe6#
    • 1...Sb5
      • 2.Rxe6#
  • Tries
    • 1.Rxf5+?
      • 1...Sxf5
        • 2.Rxe6#
      • 1...Kxd6!
    • 1.Qd3?
      • threat
        • 2.Qxd4#
      • 1...Kf4
        • 2.Qxd4#
      • 1...Kxd6
        • 2.Qxd4#
      • 1...Rxd6
        • 2.Qe4#
      • 1...Sxc2
        • 2.Rxf5#
      • 1...Se2
        • 2.Rxf5#
      • 1...Sb3
        • 2.Rxf5#
      • 1...Sf3
        • 2.Rxf5#
      • 1...Sb5
        • 2.Rxf5#
      • 1...Sc6
        • 2.Rxf5#
      • 1...Qf4!
    • 1.Qc4?
      • threat
        • 2.Qxd4#
      • 1...Kf4
        • 2.Qxd4#
      • 1...Kxd6
        • 2.Qxd4#
      • 1...Sxc2
        • 2.Rxe6#
      • 1...Qf4
        • 2.Qd5#
      • 1...Se2
        • 2.Rxe6#
      • 1...Sb3
        • 2.Rxe6#
      • 1...Sf3
        • 2.Rxe6#
      • 1...Sb5
        • 2.Rxe6#
      • 1...Sc6
        • 2.Rxe6#
      • 1...Rxd6!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qxd4#
      • 1...Kf4
        • 2.Qxd4#
      • 1...Kxd6
        • 2.Qxd4#
      • 1...Rxd6
        • 2.Rxf5#
      • 1...Qf4
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(c);N_GUARD::R1(I),XP(h)
  • Tries
    • Try
      • R(C);CHECK,P_PINP(h),XP(f)
      • Vars
        • S(c);XR(C)::R1(I),XP(h)
      • Refutation
        • K(e);N_SPINP(h),S_FLIGHT,XP(E)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XS(c)
      • Vars
        • K(e);N_SPINP(f),S_FLIGHT::QAR2(A),XS(c)
        • K(e);N_SPINP(f),P_SPINS(c),S_FLIGHT,XP(E)::QAR2(A),XS(c)
        • R(i);SBLOCK,XP(E)::QAR1(A)
        • S(c);N_GUARD,XS(B)::R1(C),XP(f)
        • S(c);N_GUARD::R1(C),XP(f)
      • Refutation
        • Q(b);
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XS(c)
      • Vars
        • K(e);N_SPINP(f),P_SPINS(c),S_FLIGHT::QAR2(A),XS(c)
        • K(e);N_SPINP(f),S_FLIGHT,XP(E)::QAR2(A),XS(c)
        • S(c);N_GUARD,XS(B)::R1(I),XP(h)
        • Q(b);SBLOCK::QAR1(A)
        • S(c);N_GUARD::R1(I),XP(h)
      • Refutation
        • R(i);XP(E)
  • Actual
    • Q(A);P_PINS(c)
    • Threat
      • QAB1(A),XS(c)
    • Vars
      • K(e);N_SPINP(f),N_SPINS(c),S_FLIGHT::QAR2(A),XS(c)
      • K(e);N_SPINP(f),N_SPINS(c),S_FLIGHT,XP(E)::QAR2(A),XS(c)
      • R(i);SBLOCK,XP(E)::R1(C),XP(f)
      • Q(b);SBLOCK::R1(I),XP(h)
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