MESON Chess Problem Database

Problem Display
PID: 28749 (b6q/8/3p4/1R2nQ2/P1kNn2r/K1pR4/5p2/1B2b3 w - - 0 1)

Shire, David J

Problem Observer, 1980

b6q/8/3p4/1R2nQ2/P1kNn2r/K1pR4/5p2/1B2b3

#2

7 + 10

3256 David Shire Selected Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.Ba2#
    • 1...Sg5
      • 2.Ba2#
    • 1...Sf6
      • 2.Ba2#
    • 1...Sf3
      • 2.Rb4#
    • 1...Sg4
      • 2.Rb4#
    • 1...Sc6
      • 2.Qd5#
    • 1...Sg6
      • 2.Rb4#
    • 1...Sd7
      • 2.Rb4#
    • 1...Sf7
      • 2.Rb4#
  • Tries
    • 1.Se6?
      • threat
        • 2.Rd4#
        • 2.Rb4#
      • 1...Sxd3
        • 2.Ba2#
      • 1...Qb8
        • 2.Rd4#
      • 1...Sd2
        • 2.Rb4#
      • 1...Sg3
        • 2.Ba2#
        • 2.Rb4#
      • 1...Sc5
        • 2.Rb4#
      • 1...Sg5
        • 2.Ba2#
        • 2.Rb4#
      • 1...Sf6
        • 2.Ba2#
        • 2.Rb4#
      • 1...Sf3
        • 2.Rb4#
      • 1...Sg4
        • 2.Rb4#
      • 1...Sc6
        • 2.Qd5#
      • 1...Sg6
        • 2.Rb4#
      • 1...Sd7
        • 2.Rb4#
      • 1...Sf7
        • 2.Rb4#
      • 1...c2!
    • 1.Qe6+?
      • 1...Bd5
        • 2.Qxd5#
      • 1...d5!
  • Keys
    • 1.Se2!
      • threat
        • 2.Rd4#
      • 1...Sxd3
        • 2.Ba2#
      • 1...Sd2
        • 2.Rxc3#
      • 1...Sg3
        • 2.Ba2#
      • 1...Sc5
        • 2.Rb4#
      • 1...Sg5
        • 2.Ba2#
      • 1...Sf6
        • 2.Ba2#
      • 1...Sf3
        • 2.Rb4#
      • 1...Sg4
        • 2.Rb4#
      • 1...Sc6
        • 2.Qd5#
      • 1...Sg6
        • 2.Rb4#
      • 1...Sd7
        • 2.Rb4#
      • 1...Sf7
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(e);::B(A)
    • S(g);::R1(F)
    • S(g);OGATE::QAB1(G)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);SBLOCK,XR(C)::B(A)
        • Q(j);::R1(C)
        • S(e);::R1(F)
        • S(g);::R1(F)
        • S(g);OGATE::QAB1(G)
      • Refutation
        • P(c);
    • Try
      • Q(G);CHECK
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::QAB1(G),XB(i)
      • Refutation
        • P(h);P_SPINP(h)
  • Actual
    • S(E);
    • Threat
      • R1(C)
    • Vars
      • S(g);SBLOCK,XR(C)::B(A)
      • S(e);N_GUARD,S_CUTB(a)::R1(C),XP(c)
      • S(e);::B(A)
      • S(e);SBLOCK::R1(F)
      • S(g);::R1(F)
      • S(g);OGATE::QAB1(G)
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