MESON Chess Problem Database

Problem Display
PID: 141171 (R2B4/1p1K4/N7/1k1N1R2/2b1p2p/3q3r/pn6/3Q1B2 w - - 0 1)

Anderson, Martin (England)

Source?, 0000

R2B4/1p1K4/N7/1k1N1R2/2b1p2p/3q3r/pn6/3Q1B2

#2

8 + 9

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sc3#
      • 2.Se3#
      • 2.Sdb4#
      • 2.Sf4#
      • 2.Sb6#
      • 2.Sf6#
      • 2.Se7#
    • 1...Qxf1
      • 2.Sc3#
    • 1...Qc2
      • 2.Sc3#
      • 2.Sb6#
    • 1...Qe2
      • 2.Sc3#
    • 1...Qa3
      • 2.Sc3#
      • 2.Sdb4#
    • 1...Qb3
      • 2.Sc3#
      • 2.Sb6#
    • 1...Qc3
      • 2.Sxc3#
    • 1...Qe3
      • 2.Sc3#
      • 2.Sxe3#
    • 1...Qf3
      • 2.Sc3#
      • 2.Sf4#
    • 1...Qg3
      • 2.Sc3#
      • 2.Sf4#
    • 1...Qxd5+
      • 2.Rxd5#
    • 1...Bb3
      • 2.Qxb3#
    • 1...Bxd5
      • 2.Qb3#
  • Tries
    • 1.Qb3+?
      • 1...Qxb3
        • 2.Sc3#
        • 2.Sb6#
      • 1...Bxb3!
  • Keys
    • 1.Kd6!
      • threat
        • 2.Sc7#
      • 1...Qa3+
        • 2.Sdb4#
      • 1...Qg3+
        • 2.Sf4#
      • 1...Qxd5+
        • 2.Rxd5#
      • 1...Bxd5
        • 2.Qb3#
      • 1...bxa6
        • 2.Rb8#
      • 1...Bb3
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_PINS(C),XB(B)::R(D)+S(C),DCHECK
    • Q(c);N_PINS(C)::R(D)+S(C),DCHECK
    • Q(c);N_PINS(C),P_SPINB(e)::R(D)+S(C),DCHECK,XQ(c)
    • Q(c);CHECK,OGATE,P_SPINB(e),P_SPINQ(c),XS(C)::R(D),XQ(c)
    • B(e);N_GUARD,P_SPINQ(c)::QAR2(A),XB(e)
    • B(e);N_GUARD,P_SPINB(e),P_SPINQ(c),XS(C)::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • B(e);P_SPINQ(c),XQ(A)
  • Actual
    • K(F);P-FLIGHT
    • Threat
      • S(E)
    • Vars
      • Q(c);CHECK,N_PINS(C),P_SPINB(e)::R(D)+S(C)
      • Q(c);CHECK,OGATE,P_SPINB(e),P_SPINQ(c),XS(C)::R(D),XQ(c)
      • B(e);N_GUARD,P_SPINB(e),P_SPINQ(c),XS(C)::QAR2(A)
      • P(i);OGATEB,SBLOCK,XS(E)::R(G)
      • B(e);N_GUARD,P_SPINQ(c)::QAR2(A),XB(e)
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