MESON Chess Problem Database

Problem Display
PID: 42067 (5b2/1p2p2q/pQ6/1P1kPr2/3N1p2/1K1R1P2/3Pr3/5b2 w - - 0 1)

Barnes, Barry Peter

The Problemist Supplement, 2002

5b2/1p2p2q/pQ6/1P1kPr2/3N1p2/1K1R1P2/3Pr3/5b2

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qe6#
    • 1...Rexe5
      • 2.Se2#
    • 1...Rfxe5
      • 2.Sf5#
    • 1...axb5
      • 2.Qxb5#
    • 1...e6
      • 2.Sc6#
  • Tries
    • 1.Qd8+?
      • 1...Kc5
        • 2.Rc3#
      • 1...Kxe5!
    • 1.Qc6+?
      • 1...Kxe5
        • 2.Qe6#
      • 1...bxc6!
    • 1.Qxb7+?
      • 1...Kc5
        • 2.Se6#
        • 2.Qc6#
      • 1...Kxe5!
  • Keys
    • 1.bxa6!
      • threat
        • 2.Qb5#
      • 1...Kxe5
        • 2.Qe6#
      • 1...Rexe5
        • 2.Se2#
      • 1...Rfxe5
        • 2.Sf5#
      • 1...bxa6
        • 2.Qa5#
      • 1...e6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(d);P-FLIGHT,XP(G)::QAR1(H)
    • R(b);SBLOCK,XP(G)::R(C)+S(E)
    • R(e);SBLOCK,XP(G)::R(C)+S(E)
    • P(f);OGATE,XP(F)::QAR2(H),XP(f)
    • P(h);SBLOCK::R(C)+S(E)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • K(d);P-FLIGHT::R(C)
      • Refutation
        • K(d);P-FLIGHT,XP(G)
    • Try
      • Q(H);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(G)::QAR1(H)
      • Refutation
        • P(g);XQ(H)
    • Try
      • Q(H);CHECK,XP(g)
      • Refutation
        • K(d);P-FLIGHT,XP(G)
  • Actual
    • P(F);XP(f)
    • Threat
      • QAR2(H)
    • Vars
      • K(d);P-FLIGHT,XP(G)::QAR1(H)
      • R(b);SBLOCK,XP(G)::R(C)+S(E)
      • R(e);SBLOCK,XP(G)::R(C)+S(E)
      • P(g);N_GUARD,XP(F)::QAR(H)
      • P(h);SBLOCK::R(C)+S(E)
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