MESON Chess Problem Database

Problem Display
PID: 42299 (b1B4r/q2R1ppp/5kr1/1RBn1P1Q/2N2p2/b1p1p2N/6P1/4K3 w - - 0 1)

Barnes, Barry Peter

Mansfield, Comins

3rd Prize, The Problemist, 1980/II

b1B4r/q2R1ppp/5kr1/1RBn1P1Q/2N2p2/b1p1p2N/6P1/4K3

#2

10 + 13

4054 Complete Mansfield/III 1999
4199 Barnes about Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Bd4#
    • 1...Qa5
      • 2.Bd4#
    • 1...Qa6
      • 2.Bd4#
    • 1...Qb7
      • 2.Bd4#
    • 1...Rxg2
      • 2.Qxf7#
    • 1...Rg3
      • 2.Qxf7#
    • 1...Rg4
      • 2.Qxf7#
    • 1...Rg5
      • 2.Qxf7#
      • 2.Qxg5#
    • 1...Rh6
      • 2.Qxf7#
      • 2.Qg5#
    • 1...Sb4
      • 2.Be7#
    • 1...Sb6
      • 2.Bd4#
    • 1...Se7
      • 2.Rd6#
  • Tries
    • 1.Rb6+?
      • 1...Bc6
        • 2.Bd4#
        • 2.Rxc6#
      • 1...Sxb6
        • 2.Bd4#
      • 1...Qxb6!
    • 1.Qh4+?
      • 1...Rg5
        • 2.Qxg5#
      • 1...Kxf5!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Se4#
      • 1...Kxf5
        • 2.Rxf7#
      • 1...Rxg5
        • 2.Qxf7#
      • 1...Re8
        • 2.Sxh7#
      • 1...Sb4
        • 2.Be7#
      • 1...Sb6
        • 2.Bd4#
      • 1...Sc7
        • 2.Rxf7#
      • 1...Se7
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(h);N_GUARD::B(F)
    • R(g);OGATE,XP(B)::QAR1(H),XP(i)
    • R(g);OGATE::QAR1(H),XP(i)
    • S(e);N_GUARD,S_CUTB(a)::B(F)
    • S(e);S_CUTQ(h)::B(F)
    • S(e);SBLOCK::R(I)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • S(e);XR(E)::B(F)
      • Refutation
        • Q(h);XR(E)
    • Try
      • Q(H);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAB1(H),XR(g)
      • Refutation
        • K(f);P-FLIGHT,XP(G)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • K(f);P-FLIGHT,XP(G)::B(J)+R(I),DCHECK,XP(i)
      • R(g);OGATE,SBLOCK,XS(C)::QAR1(H),XP(i)
      • R(m);N_GUARD::S(C),XP(k)
      • S(e);N_GUARD,S_CUTB(a)::B(F)
      • S(e);S_CUTQ(h)::B(F)
      • S(e);S_CUTQ(h)::R1(I),XP(i)
      • S(e);SBLOCK::R(I)
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