MESON Chess Problem Database

Problem Display
PID: 139472 (1BK5/1QN5/4p3/1p1R4/Rqb1k1P1/1N2pp2/2r1r3/1B6 w - - 0 1)

Lipton, Michael

The Problemist Supplement, 2010

1BK5/1QN5/4p3/1p1R4/Rqb1k1P1/1N2pp2/2r1r3/1B6

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Rd4#
  • Tries
    • 1.Sa6?
      • threat
        • 2.Rd4#
      • 1...Qc5+
        • 2.Sbxc5#
        • 2.Saxc5#
      • 1...Qf8+
        • 2.Rd8#
      • 1...Bxb3+
        • 2.Sc5#
      • 1...Bd3+
        • 2.Rc5#
      • 1...Bxd5+
        • 2.Sac5#
      • 1...Qxb3
        • 2.Sc5#
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rd7#
        • 2.Rd8#
      • 1...exd5
        • 2.Qh7#
      • 1...Qd6!
    • 1.Sxe6?
      • threat
        • 2.Sg5#
        • 2.Rd4#
      • 1...Qc5+
        • 2.Sbxc5#
        • 2.Sexc5#
      • 1...Qf8+
        • 2.Rd8#
      • 1...Bxb3+
        • 2.Sc5#
      • 1...Bd3+
        • 2.Rc5#
      • 1...Bxd5+
        • 2.Sbc5#
        • 2.Sec5#
      • 1...Qe7
        • 2.Rd4#
        • 2.Rd7#
      • 1...Qd6!
  • Keys
    • 1.Sxb5!
      • threat
        • 2.Rd4#
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Qf8+
        • 2.Rd8#
      • 1...Bxb3+
        • 2.Sc3#
      • 1...Bd3+
        • 2.Rc5#
      • 1...Bxb5+
        • 2.Sc5#
      • 1...Bxd5+
        • 2.Sc5#
      • 1...exd5
        • 2.Qh7#
      • 1...Qd6
        • 2.Rxc4#

This is after 6530

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • P(i);SBLOCK::QAB(F)+R(E),DCHECK
  • Tries
    • Try
      • S(G);
      • Threat
        • QAB(F)+R(E),DCHECK
      • Vars
        • Q(e);CHECK,P_SPINB(f)::QAB(F)+R(E)
        • B(f);CHECK,P_SPINQ(e),XS(B)::S(G)
        • B(f);CHECK,N_GUARD,N_SPINR(a),P_SPINQ(e),SBLOCK::QAB(F)+R(E)
        • B(f);CHECK,P_SPINB(f),P_SPINQ(e),XR(E)::S(G)
        • P(i);P_SPINP(i),SBLOCK,XR(E)::QAB(F)
      • Refutation
        • Q(e);P_SPINB(f)
    • Try
      • S(G);XP(i)
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);CHECK,P_SPINB(f)::QAB(F)+R(E)
        • B(f);CHECK,P_SPINQ(e),XS(B)::S(G)
        • B(f);CHECK,N_GUARD,N_SPINR(a),P_SPINQ(e),SBLOCK::QAB(F)+R(E)
      • Refutation
        • Q(e);P_SPINB(f)
  • Actual
    • S(G);XP(h)
    • Threat
      • QAB(F)+R(E),DCHECK
    • Vars
      • Q(e);CHECK,N_GUARD,P_SPINB(f)::S(B),XQ(e)
      • Q(e);CHECK,P_SPINB(f)::QAB(F)+R(E)
      • B(f);CHECK,P_SPINQ(e),XS(B)::S(G)
      • B(f);CHECK,N_GUARD,N_SPINR(a),P_SPINQ(e),SBLOCK::QAB(F)+R(E)
      • B(f);CHECK,P_SPINQ(e),XS(G)::S(B)
      • B(f);CHECK,P_SPINB(f),P_SPINQ(e),XR(E)::S(B)
      • P(i);P_SPINP(i),SBLOCK,XR(E)::QAB(F)
      • Q(e);OGATE,P_SPINB(f)::R(C),XB(f)
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