MESON Chess Problem Database

Problem Display
PID: 12388 (4r2q/pR1R1p1p/p1k5/4n2K/1p3b2/1N1nB2Q/8/rb3B2 w - - 0 1)

Gooderson, Arthur R

The Problemist, 1978

4r2q/pR1R1p1p/p1k5/4n2K/1p3b2/1N1nB2Q/8/rb3B2

#2

7 + 13

3207 A R Gooderson An English Progressive 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Sxa5#
    • 1...Ba2
      • 2.Sa5#
    • 1...Sc1
      • 2.Rbc7#
    • 1...Se1
      • 2.Rbc7#
    • 1...Sb2
      • 2.Rbc7#
    • 1...Sf2
      • 2.Rbc7#
    • 1...Sc5
      • 2.Sd4#
    • 1...Sxd7
      • 2.Qxd7#
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qe4#
      • 1...Sxd7
        • 2.Qxd7#
      • 1...Ra5
        • 2.Sxa5#
      • 1...Sc1
        • 2.Rbc7#
      • 1...Se1
        • 2.Rbc7#
      • 1...Sb2
        • 2.Rbc7#
      • 1...Sf2
        • 2.Rbc7#
      • 1...Sc5
        • 2.Sd4#
      • 1...Sf3
        • 2.Qd5#
      • 1...Sc4
        • 2.Qd5#
      • 1...Sg4
        • 2.Qd5#
      • 1...Sg6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD::S(B),XR(a)
    • B(b);S_CUTR(a)::S(B)
    • S(c);::R1(F)
    • S(c);SBLOCK::S(B)
    • S(f);OGATE,XR(G)::QAB1(D),XS(f)
  • Actual
    • Q(D);
    • Threat
      • QAB(D)
    • Vars
      • S(f);OGATE,XR(G)::QAB1(D),XS(f)
      • R(a);N_GUARD::S(B),XR(a)
      • S(c);::R1(F)
      • S(c);SBLOCK::S(B)
      • S(f);OGATE::QAB1(D)
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