MESON Chess Problem Database

Problem Display
PID: 71359 (1b6/8/2K2Rp1/p3p3/4k1N1/1R2Prr1/4NQp1/2n4B w - - 0 1)

Boros, Sandor

Il Problema, 1932

1b6/8/2K2Rp1/p3p3/4k1N1/1R2Prr1/4NQp1/2n4B

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf2
      • 2.Sxg3#
      • 2.Sxf2#
    • 1...Rf4
      • 2.Sxg3#
    • 1...Rf5
      • 2.Sxg3#
    • 1...Rxf6+
      • 2.Sxf6#
    • 1...Rxg4
      • 2.Qxf3#
    • 1...Sd3
      • 2.Sc3#
    • 1...g1S
      • 2.Sxg3#
    • 1...g1B
      • 2.Sxg3#
  • Tries
    • 1.Rf4+?
      • 1...Rxf4
        • 2.Sxg3#
      • 1...exf4!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Sc3#
      • 1...Rxf6+
        • 2.Sxf6#
      • 1...Rxf1
        • 2.Sxg3#
      • 1...Rxe3
        • 2.Sf2#
      • 1...Rxg4
        • 2.Qxf3#
      • 1...Sxe2
        • 2.Qb1#
      • 1...gxf1Q
        • 2.Sxg3#
      • 1...gxf1S
        • 2.Sf2#
      • 1...gxf1B
        • 2.Sxg3#
        • 2.Sf2#
      • 1...gxf1R
        • 2.Sxg3#
      • 1...Sa2
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD,P_SPINP(b)::S(B),XR(d)
    • R(c);CHECK,P_SPINP(b),XR(H)::S(F),XR(c)
    • R(d);N_GUARD,XS(F)::QAB1(C),XR(c)
    • S(a);SBLOCK::S(B)
    • P(b);P_SPINR(c)::S(B),XR(d)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • R(c);P_SPINP(b),XR(H)::S(B),XR(d)
      • Refutation
        • P(g);XR(H)
  • Actual
    • Q(C);
    • Threat
      • S(B)
    • Vars
      • R(c);CHECK,P_SPINP(b),XR(H)::S(F),XR(c)
      • R(c);N_GUARD,P_SPINP(b),XQ(C)::S(B),XR(d)
      • R(c);N_GUARD,P_SPINP(b),XP(E)::S(F)
      • R(d);N_GUARD,XS(F)::QAB1(C),XR(c)
      • S(a);OGATE,XS(B)::QAB(C)
      • P(b);P_SPINR(c),XQ(C)::S(B),XR(d)
      • P(b);P_SPINR(c),XQ(C)::S(F)
      • S(a);OGATE::QAB(C)
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