MESON Chess Problem Database

Problem Display
PID: 162737 (n1N4B/1K1p4/p1QP4/Ppp2B2/r1kbn1Rr/1RpN4/2P2p2/7b w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Observer, 1924

(First published on Sun Nov 9 1924)

n1N4B/1K1p4/p1QP4/Ppp2B2/r1kbn1Rr/1RpN4/2P2p2/7b

#2

11 + 13

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rb4#
    • 1...Ra2
      • 2.Rb4#
    • 1...Ra3
      • 2.Rb4#
    • 1...Rb4
      • 2.Rxb4#
    • 1...Rxa5
      • 2.Rb4#
    • 1...Be3
      • 2.Rxc3#
    • 1...Be5
      • 2.Qxc5#
    • 1...Bf6
      • 2.Qxc5#
    • 1...Bg7
      • 2.Qxc5#
    • 1...Bxh8
      • 2.Qxc5#
    • 1...Sd2
      • 2.Se5#
    • 1...Sg3
      • 2.Se5#
    • 1...Sg5
      • 2.Se5#
    • 1...Sxd6+
      • 2.Sxd6#
    • 1...Sf6
      • 2.Se5#
    • 1...Sb6
      • 2.Sxb6#
    • 1...Sc7
      • 2.Sb6#
    • 1...dxc6
      • 2.Be6#
  • Tries
    • 1.Kxa8?
      • threat
        • 2.Sb6#
      • 1...Bxh8
        • 2.Qxc5#
      • 1...Be5
        • 2.Qxc5#
      • 1...Bf6
        • 2.Qxc5#
      • 1...Bg7
        • 2.Qxc5#
      • 1...Rxh8!
    • 1.Sb4?
      • threat
        • 2.Qd5#
      • 1...Sxd6+
        • 2.Sxd6#
      • 1...dxc6
        • 2.Be6#
      • 1...Sd2
        • 2.Bd3#
      • 1...Sg3
        • 2.Bd3#
      • 1...Sg5
        • 2.Bd3#
      • 1...Sf6
        • 2.Bd3#
      • 1...Sb6
        • 2.Sxb6#
      • 1...Sc7
        • 2.Sb6#
      • 1...Rxb4!
    • 1.Qxb5+?
      • 1...Kd5
        • 2.Sf4#
      • 1...axb5!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qd5#
      • 1...Sxd6+
        • 2.Sxd6#
      • 1...dxc6
        • 2.Be6#
      • 1...Sd2
        • 2.Bd3#
      • 1...Sg3
        • 2.Bd3#
      • 1...Sg5
        • 2.Bd3#
      • 1...Sf6
        • 2.Bd3#
      • 1...Sb6
        • 2.Sxb6#
      • 1...Sc7
        • 2.Sb6#
      • 1...b4
        • 2.Qxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • R(d);N_GUARD::R1(B)
    • R(d);N_GUARD::R1(B),XR(d)
    • R(d);N_GUARD,XP(E)::R1(B)
    • B(f);N_GUARD,P_SPINS(g)::R1(B),XP(c)
    • B(f);N_GUARD,P_SPINS(g)::QAR1(G),XP(j)
    • B(f);N_GUARD,P_SPINS(g),XB(K)::QAR1(G),XP(j)
    • S(g);P_PINQ(G),P_SPINB(f)::S(C)
    • S(g);CHECK,P_PINQ(G),P_SPINB(f),XP(H)::S(J),XS(g)
    • S(m);N_GUARD::S(J),XS(m)
    • S(m);N_GUARD::S(J)
    • P(l);N_GUARD,N_SPINP(j),XQ(G)::B(F)
  • Tries
    • Try
      • K(I);S_FLIGHT,XS(m)
      • Threat
        • S(J)
      • Vars
        • B(f);N_GUARD,P_SPINS(g),XB(K)::QAR1(G),XP(j)
        • B(f);N_GUARD,P_SPINS(g)::QAR1(G),XP(j)
      • Refutation
        • R(h);P_PINS(J),XB(K)
    • Try
      • S(C);
      • Threat
        • QAB1(G)
      • Vars
        • S(g);CHECK,P_PINQ(G),P_SPINB(f),XP(H)::S(J),XS(g)
        • P(l);N_GUARD,N_SPINP(j),XQ(G)::B(F)
        • S(g);OGATE,P_PINQ(G),P_SPINB(f)::B(F)
        • S(m);N_GUARD::S(J),XS(m)
        • S(m);N_GUARD::S(J)
      • Refutation
        • R(d);XS(C)
    • Try
      • Q(G);CHECK,N_PINP(j),XP(i)
      • Vars
        • K(e);P_SPINP(j),S_FLIGHT::S(C)
      • Refutation
        • P(k);XQ(G)
  • Actual
    • S(C);
    • Threat
      • QAB1(G)
    • Vars
      • S(g);CHECK,P_PINQ(G),XP(H)::S(J),XS(g)
      • P(l);N_GUARD,N_SPINP(j),XQ(G)::B(F)
      • S(g);OGATE,P_PINQ(G)::B(F)
      • S(m);N_GUARD::S(J),XS(m)
      • S(m);N_GUARD::S(J)
      • P(i);OGATEB::QAB(G),XP(k)
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