MESON Chess Problem Database

Problem Display
PID: 11059 (6B1/K1Np4/p1p5/r1k1Pp2/p1pb2r1/1P6/R1P1nN2/5QB1 w - - 0 1)

Morgan, TH

Chess, 1936

6B1/K1Np4/p1p5/r1k1Pp2/p1pb2r1/1P6/R1P1nN2/5QB1

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Sxa6#
    • 1...Ba1
      • 2.Sd3#
    • 1...Bb2
      • 2.Sd3#
    • 1...Bc3
      • 2.Sd3#
    • 1...Sc1
      • 2.Qxc4#
    • 1...Sxg1
      • 2.Qxc4#
    • 1...Sc3
      • 2.Qxc4#
    • 1...Sg3
      • 2.Qxc4#
    • 1...Sf4
      • 2.Qxc4#
    • 1...cxb3
      • 2.Sd3#
    • 1...c3
      • 2.Sd3#
  • Keys
    • 1.c3!
      • threat
        • 2.b4#
      • 1...Bxc3
        • 2.Sd3#
      • 1...Bxe5
        • 2.Se4#
      • 1...Sxc3
        • 2.Qxc4#
      • 1...axb3
        • 2.Rxa5#
      • 1...cxb3
        • 2.Sd3#
      • 1...Rb5
        • 2.Sxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(f);N_GUARD,SBLOCK::S(I),XP(i)
    • B(d);::B(B)+S(E),DCHECK
    • S(a);OGATE::QAR1(A),XP(c)
    • S(a);OGATE,XB(B)::QAR1(A),XP(c)
    • P(c);N_GUARD,XP(F)::S(E)
    • P(c);N_GUARD::S(E)
  • Actual
    • P(D);
    • Threat
      • P(F)
    • Vars
      • B(d);XP(D)::B(B)+S(E),DCHECK
      • B(d);XP(G)::B(B)+S(E),DCHECK
      • S(a);OGATE,XP(D)::QAR1(A),XP(c)
      • P(b);OGATE,XP(F)::R(C),XR(f)
      • P(c);N_GUARD,XP(F)::S(E)
      • R(f);N_GUARD,SBLOCK::S(I),XP(i)
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