MESON Chess Problem Database

Problem Display
PID: 108183 (8/5n1N/8/3n1k1P/7R/KB1r4/6P1/BQ2Rb2 w - - 0 1)

Becker, Christopher Bennett

Northwest Chess, 1975

8/5n1N/8/3n1k1P/7R/KB1r4/6P1/BQ2Rb2

#2

9 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Be6#
    • 1...Sb4
      • 2.Rxf1#
    • 1...Sf4
      • 2.g4#
    • 1...Sb6
      • 2.Rxf1#
    • 1...Sf6
      • 2.Rxf1#
    • 1...Sc7
      • 2.Rxf1#
    • 1...Se7
      • 2.Rxf1#
    • 1...Se5
      • 2.Rxe5#
    • 1...Sg5
      • 2.Re5#
    • 1...Sd6
      • 2.Re5#
    • 1...Sh6
      • 2.Re5#
    • 1...Sd8
      • 2.Re5#
    • 1...Sh8
      • 2.Re5#
  • Tries
    • 1.Rxf1+?
      • 1...Sf4
        • 2.Rfxf4#
        • 2.Rhxf4#
        • 2.Qxd3#
      • 1...Ke6!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qc8#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sc3
        • 2.Be6#
      • 1...Se3
        • 2.Qf2#
      • 1...Sb4
        • 2.Rxf1#
      • 1...Sf4
        • 2.g4#
      • 1...Sb6
        • 2.Rxf1#
      • 1...Sf6
        • 2.Rxf1#
      • 1...Sc7
        • 2.Rxf1#
      • 1...Se7
        • 2.Rxf1#
      • 1...Sg5
        • 2.Re5#
      • 1...Sd6
        • 2.Re5#
      • 1...Sd8
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(c);N_PINB(F)::B(F)
    • S(c);N_GUARD::R(C),XB(a)
    • S(c);SBLOCK::P(D)
    • S(e);N_GUARD::R1(C),XS(e)
    • S(e);N_GUARD::R1(C)
  • Tries
    • Try
      • R(C);CHECK,XB(a)
      • Refutation
        • K(d);N_SPINR(b),P_SPINS(c),S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • S(e);N_GUARD::R1(C),XS(e)
      • S(c);N_PINB(F)::B(F)
      • S(c);N_GUARD::QAR(B)
      • S(c);N_GUARD::R(C),XB(a)
      • S(c);SBLOCK::P(D)
      • S(e);N_GUARD::R1(C)
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