MESON Chess Problem Database

Problem Display
PID: 65972 (8/4B3/K1p5/pR6/kb3Q2/3N3R/8/2q2b2 w - - 0 1)

Anonymous

The Chess Monthly (Hoffer), 1881

8/4B3/K1p5/pR6/kb3Q2/3N3R/8/2q2b2

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Sxb2#
      • 2.Sc5#
    • 1...Qd2
      • 2.Sc5#
    • 1...Qa3
      • 2.Sc5#
    • 1...Qxf4
      • 2.Sb2#
    • 1...Qa1
      • 2.Sc5#
    • 1...Qb1
      • 2.Sc5#
    • 1...Qd1
      • 2.Sb2#
      • 2.Sc5#
    • 1...Qe1
      • 2.Sb2#
      • 2.Sc5#
    • 1...Qc4
      • 2.Sb2#
    • 1...Qc5
      • 2.Sb2#
      • 2.Sxc5#
  • Tries
    • 1.Rxb4+?
      • 1...axb4
        • 2.Qxb4#
      • 1...Ka3!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Sc5#
        • 2.Rxa5#
      • 1...Ka3
        • 2.Rxa5#
      • 1...Qxc4
        • 2.Sb2#
      • 1...Bxd3
        • 2.Rxa5#
      • 1...Bxh3
        • 2.Rxa5#
      • 1...cxb5
        • 2.Sc5#
      • 1...Qe3
        • 2.Rxa5#
      • 1...Qg5
        • 2.Sb2#
      • 1...Qc3
        • 2.Rxa5#
      • 1...c5
        • 2.Sxc5#
        • 2.Rxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::S(A)
    • Q(a);N_GUARD,N_SPINB(d),XQ(C)::S(A)
    • Q(a);N_GUARD,N_SPINB(d),P_PINR(D)::S(A)
  • Tries
    • Try
      • R(D);CHECK,P_SPINS(A),XB(d)
      • Vars
        • P(e);OGATE,P_SPINP(e),XR(D)::QAR1(C),XP(e)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);P-FLIGHT::R(D),XP(e)
      • Q(a);N_GUARD,N_SPINB(d),P_PINR(D),XQ(C)::S(A)
      • B(b);XS(A)::R1(D),XP(e)
      • B(b);SBLOCK,XR(B)::R1(D),XP(e)
      • P(f);XR(D)::S(A)
      • Q(a);::R1(D),XP(e)
      • Q(a);N_GUARD::S(A)
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