MESON Chess Problem Database

Problem Display
PID: 162124 (8/8/8/1b1Q4/1K5B/PN2p3/R1ppk2n/6Rn w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Observer, 1924

(First published on Sun Feb 17 1924)

8/8/8/1b1Q4/1K5B/PN2p3/R1ppk2n/6Rn

#2

7 + 7

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.Sd4#
    • 1...Sf3
      • 2.Qxb5#
    • 1...c1Q
      • 2.Sxc1#
    • 1...c1S
      • 2.Sxc1#
      • 2.Re1#
    • 1...c1B
      • 2.Sxc1#
      • 2.Re1#
    • 1...c1R
      • 2.Sxc1#
    • 1...d1Q
      • 2.Qxd1#
    • 1...d1S
      • 2.Sc1#
      • 2.Re1#
      • 2.Rxc2#
      • 2.Qxd1#
    • 1...d1B
      • 2.Sc1#
      • 2.Re1#
      • 2.Qxd1#
    • 1...d1R
      • 2.Qxd1#
  • Keys
    • 1.Kc3!
      • threat
        • 2.Sd4#
      • 1...c1Q+
        • 2.Sxc1#
      • 1...c1R+
        • 2.Sxc1#
      • 1...d1S+
        • 2.Qxd1#
      • 1...Sg3
        • 2.Qg2#
      • 1...Sf1
        • 2.Qh5#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...Sf3
        • 2.Qxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(g);SBLOCK::S(D)
    • S(e);SBLOCK::QAB(G),XB(g)
    • P(b);P_SPINP(c)::S(D),XQ(b)
    • P(b);P_SPINP(c)::S(D),XR(b)
    • P(c);OGATE,P_SPINP(b)::QAB1(G),XQ(c)
    • P(c);OGATE,P_SPINP(b)::QAB1(G),XR(c)
  • Actual
    • K(E);S_FLIGHT
    • Threat
      • S(D)
    • Vars
      • P(b);CHECK,P_SPINP(c)::S(D),XQ(b)
      • P(b);CHECK,P_SPINP(c)::S(D),XR(b)
      • P(c);CHECK,OGATE,P_SPINP(b)::QAB1(G),XS(c)
      • S(a);N_GUARD::QAR2(G)
      • S(e);N_GUARD::QAB(G)
      • P(c);OGATE,P_SPINP(b)::QAB1(G),XQ(c)
      • P(c);OGATE,P_SPINP(b)::QAB1(G),XR(c)
      • S(e);SBLOCK::QAB(G),XB(g)
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