MESON Chess Problem Database

Problem Display
PID: 241261 (2B1KN2/r2pp3/p4k1B/Q6P/8/8/4P1r1/4R2n w - - 0 1)

Zilahi, Zoltan

Shakhmaty (Riga), 1963

2B1KN2/r2pp3/p4k1B/Q6P/8/8/4P1r1/4R2n

#2

8 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Qg5#
    • 1...Rf2
      • 2.Qg5#
    • 1...Rh2
      • 2.Qg5#
    • 1...Rg5
      • 2.Qxg5#
    • 1...Sg3
      • 2.Qg5#
    • 1...d6
      • 2.Sh7#
      • 2.Qf5#
    • 1...e6
      • 2.Sh7#
  • Tries
    • 1.Sxd7+?
      • 1...Ke6
        • 2.Qe5#
      • 1...Rxd7!
    • 1.Rf1+?
      • 1...Rf2
        • 2.Qg5#
      • 1...Sf2!
    • 1.Qc3+?
      • 1...e5
        • 2.Qf3#
      • 1...Kf5!
  • Keys
    • 1.e4!
      • threat
        • 2.Qf5#
      • 1...d5
        • 2.e5#
      • 1...Rf2
        • 2.Qg5#
      • 1...Rg5
        • 2.Qxg5#
      • 1...Sg3
        • 2.Qg5#
      • 1...e5
        • 2.Qd8#
      • 1...e6
        • 2.Sh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD,XP(B)::QAB1(C)
    • R(b);N_GUARD::QAB1(C)
    • R(b);N_GUARD::QAB1(C),XR(b)
    • S(a);S_CUTR(b)::QAB1(C)
    • P(g);SBLOCK::S(H)
  • Tries
    • Try
      • S(H);CHECK,XP(f)
      • Vars
        • K(d);P-FLIGHT::QAR1(C)
      • Refutation
        • R(e);XS(H)
    • Try
      • R(A);CHECK
      • Vars
        • R(b);P_SPINR(b)::QAB1(C)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);CHECK
      • Vars
        • P(g);P_SPINP(g),SBLOCK::QAR(C)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(f)
  • Actual
    • P(B);
    • Threat
      • QAR1(C)
    • Vars
      • P(f);::P(B)
      • R(b);N_GUARD::QAB1(C)
      • R(b);N_GUARD::QAB1(C),XR(b)
      • S(a);S_CUTR(b)::QAB1(C)
      • P(g);OGATEB,SBLOCK::QAB(C)
      • P(g);SBLOCK::S(H)
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