MESON Chess Problem Database

Problem Display
PID: 10009 (8/8/3Q4/4R3/BBp2p2/Rp6/1nkn1N2/K1bN4 w - - 0 1)

Barnes, Barry Peter

4th HM., Probleemblad, 1961

8/8/3Q4/4R3/BBp2p2/Rp6/1nkn1N2/K1bN4

#2

8 + 7

3147 Chess Problems: Introduction to an Art 1963
4199 Barnes about Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Se3#
  • Tries
    • 1.Ra2?
      • 1...Sb1
        • 2.Qg6#
      • 1...Sf1
        • 2.Qg6#
      • 1...Sf3
        • 2.Qg6#
      • 1...c3
        • 2.Qd3#
      • 1...f3
        • 2.Se3#
      • 1...Se4!
    • 1.Re2?
      • 1...Sxd1
        • 2.Qg6#
      • 1...Sxa4
        • 2.Qg6#
      • 1...c3
        • 2.Bxb3#
      • 1...f3
        • 2.Se3#
      • 1...Sd3!
  • Keys
    • 1.Rc5!
      • 1...Sxd1
        • 2.Qd3#
      • 1...Sxa4
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sb1
        • 2.Bxb3#
      • 1...Sf1
        • 2.Bxb3#
      • 1...Sf3
        • 2.Bxb3#
      • 1...Se4
        • 2.Bxb3#
      • 1...c3
        • 2.Rxc3#
      • 1...f3
        • 2.Se3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • P(g);N_GUARD::S(B)
  • Tries
    • Try
      • R(D);P_PINS(b)
      • Vars
        • S(d);N_GUARD::QAB(H)
        • P(f);N_GUARD::QAB1(H)
        • P(g);N_GUARD::S(B)
      • Refutation
        • S(d);
    • Try
      • R(G);P_PINS(d)
      • Vars
        • S(b);N_GUARD,XS(B)::QAB(H)
        • S(b);N_GUARD,N_SPINP(e),XB(E)::QAB(H)
        • P(f);N_GUARD::B(E),XP(e)
        • P(g);N_GUARD::S(B)
      • Refutation
        • S(b);
  • Actual
    • R(G);
    • Vars
      • S(b);N_GUARD,XS(B)::QAB1(H)
      • S(b);N_GUARD,N_SPINP(e),P_SPINP(f),XB(E)::QAB1(H)
      • S(b);N_GUARD::QAB1(H),XS(b)
      • S(d);N_GUARD::B(E),XP(e)
      • P(f);OGATE::R1(G),XP(f)
      • P(g);N_GUARD::S(B)
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