MESON Chess Problem Database

Problem Display
PID: 259576 (5RR1/B7/5b2/3pN2r/5k1P/7B/Q2Nn3/K6n w - - 0 1)

Budai, V

Pravda Vostoka, 1948

(First published on Sun Sep 19 1948)

5RR1/B7/5b2/3pN2r/5k1P/7B/Q2Nn3/K6n

#2

9 + 6

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Sd3#
  • Tries
    • 1.Rxf6+?
      • 1...Rf5
        • 2.Sd3#
        • 2.Rxf5#
      • 1...Kxe5!
    • 1.Rg4+?
      • 1...Kf5
        • 2.Re4#
      • 1...Kxe5!
    • 1.Qa3?
      • threat
        • 2.Qe3#
      • 1...Rxe5
        • 2.Qf3#
      • 1...Sc3
        • 2.Sd3#
      • 1...Sd4
        • 2.Sg6#
      • 1...d4
        • 2.Sg6#
      • 1...Kxe5!
    • 1.Qa4+?
      • 1...Kxe5
        • 2.Bb8#
      • 1...Sd4
        • 2.Qxd4#
      • 1...d4!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qe3#
      • 1...Kxe5
        • 2.Qb8#
      • 1...Rxe5
        • 2.Qf3#
      • 1...Sc3
        • 2.Sd3#
      • 1...Sd4
        • 2.Sg6#
      • 1...d4
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);N_PINS(F)::S(F)
  • Tries
    • Try
      • R(H);CHECK,N_SPINS(F),XB(f)
      • Refutation
        • K(c);S_FLIGHT,XS(F)
    • Try
      • R(I);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::B(D)+R(I)
      • Refutation
        • K(c);N_SPINB(f),S_FLIGHT,XS(F)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • R(e);SBLOCK,XS(F)::QAR1(B)
        • S(b);N_PINS(F)::S(F)
        • P(d);N_PINS(F)::S(F)
      • Refutation
        • K(c);N_SPINB(f),S_FLIGHT,XS(F)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINB(f),S_CUTP(d),S_CUTS(b),S_FLIGHT,XS(F)::B(G)
        • S(b);N_GUARD,N_PINS(F),P_SPINS(b)::QAR2(B),XS(b)
      • Refutation
        • P(d);N_PINS(F),P_SPINP(d)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • K(c);N_SPINB(f),OGATEB,S_FLIGHT,XS(F)::QAB(B)
      • R(e);SBLOCK,XS(F)::QAR1(B)
      • S(b);N_PINS(F)::S(F)
      • P(d);N_PINS(F)::S(F)
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