MESON Chess Problem Database

Problem Display
PID: 12105 (8/8/Q1Np4/rq6/B1nrp3/3kp3/2R5/R1B1K3 w Q - 0 1)

Barnes, Barry Peter

5th Prize, The Problemist, 1974

8/8/Q1Np4/rq6/B1nrp3/3kp3/2R5/R1B1K3

#2

7 + 8

3771 FIDE Album (1974-1976) 1980
4199 Barnes about Chess Problems 2001
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa6
      • 2.Sb4#
    • 1...Qxc6
      • 2.Ra3#
    • 1...Qb4+
      • 2.Sxb4#
    • 1...Qd5
      • 2.Sb4#
      • 2.Ra3#
    • 1...Qe5
      • 2.Sb4#
      • 2.Ra3#
    • 1...Qf5
      • 2.Sb4#
      • 2.Ra3#
    • 1...Qg5
      • 2.Sb4#
      • 2.Ra3#
    • 1...Qh5
      • 2.Sb4#
      • 2.Ra3#
    • 1...Sb2
      • 2.Ra3#
    • 1...Sa3
      • 2.Rxa3#
    • 1...Se5
      • 2.Ra3#
    • 1...Sb6
      • 2.Ra3#
  • Tries
    • 1.Se5+?
      • 1...Qxe5
        • 2.Ra3#
      • 1...Sxe5
        • 2.Ra3#
      • 1...dxe5!
    • 1.Ra3+?
      • 1...Qb3
        • 2.Sb4#
      • 1...Sxa3!
    • 1.Qxb5?
      • threat
        • 2.Sb4#
        • 2.Ra3#
        • 2.Qb3#
      • 1...Rxa4
        • 2.Qb3#
      • 1...Rd5
        • 2.Ra3#
        • 2.Qxc4#
        • 2.Qb3#
      • 1...Rxb5!
  • Keys
    • 1.Bb2!
      • threat
        • 2.Rc3#
      • 1...Qb4+
        • 2.Sxb4#
      • 1...Qxb2
        • 2.Rd1#
      • 1...Sxb2
        • 2.Ra3#
      • 1...Qb3
        • 2.0-0-0#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_GUARD,XQ(F)::S(G)
    • Q(g);N_GUARD,P_SPINS(c),XS(G)::R(A)
    • Q(g);CHECK,N_GUARD,P_SPINS(c)::S(G),XQ(g)
    • S(c);N_GUARD,P_SPINQ(g)::R(A)
    • S(c);N_GUARD,P_SPINQ(g)::R(A),XS(c)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • Q(g);P_SPINS(c),XS(G)::R(A)
        • S(c);P_SPINQ(g),XS(G)::R(A)
      • Refutation
        • P(h);XS(G)
    • Try
      • R(A);CHECK
      • Vars
        • Q(g);P_SPINQ(g),P_SPINS(c)::S(G)
      • Refutation
        • S(c);P_SPINQ(g),XR(A)
    • Try
      • Q(F);P_PINS(c),XQ(g)
      • Threat
        • DUALS(3)
      • Vars
        • R(f);XB(E)::QAR2(F)
      • Refutation
        • R(f);N_SPINS(c),XQ(F)
  • Actual
    • B(B);
    • Threat
      • R1(D)
    • Vars
      • Q(g);CHECK,N_GUARD,P_SPINS(c)::S(G),XQ(g)
      • Q(g);P_SPINS(c),XB(B)::R(A)
      • S(c);N_GUARD,P_SPINQ(g),XB(B)::R(A)
      • Q(g);P_SPINS(c)::0-0-0
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