MESON Chess Problem Database

Problem Display
PID: 224578 (1br5/5n1Q/N7/1B1pPpp1/2Rpk1p1/2p2NB1/2n2K2/8 w - - 0 1)

Bostock, J

Sunday Chronicle, 1944

(First published on Sat Oct 28 1944)

1br5/5n1Q/N7/1B1pPpp1/2Rpk1p1/2p2NB1/2n2K2/8

#2

8 + 11

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Rxd4#
      • 2.Qxf5#
    • 1...Rc5
      • 2.Sxc5#
    • 1...Rd8
      • 2.Sc5#
    • 1...Re8
      • 2.Sc5#
    • 1...Rf8
      • 2.Sc5#
    • 1...Rg8
      • 2.Sc5#
    • 1...Rh8
      • 2.Sc5#
    • 1...Bc7
      • 2.Sc5#
    • 1...Sa1
      • 2.Rxd4#
    • 1...Se1
      • 2.Rxd4#
    • 1...Sa3
      • 2.Rxd4#
    • 1...Se3
      • 2.Rxd4#
    • 1...Sb4
      • 2.Rxd4#
  • Tries
    • 1.Rxc3?
      • threat
        • 2.Sd2#
        • 2.Bd3#
      • 1...Rxc3
        • 2.Sd2#
      • 1...Sxe5
        • 2.Sd2#
        • 2.Sxg5#
      • 1...gxf3
        • 2.Bd3#
      • 1...Rc4
        • 2.Sd2#
      • 1...Se1
        • 2.Sd2#
      • 1...Sb4
        • 2.Sd2#
      • 1...d3
        • 2.Bxd3#
      • 1...dxc3!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Se1#
      • 1...Kd3
        • 2.Rxd4#
      • 1...Sxe5
        • 2.Sxe5#
      • 1...gxf3
        • 2.Qxf3#
      • 1...f4
        • 2.Qh7#
      • 1...Rh8
        • 2.Sc5#
      • 1...Se1
        • 2.Sxe1#
        • 2.Rxd4#
      • 1...Se3
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 10
  • Sets
    • R(k);N_GUARD::S(G),XR(k)
    • R(k);N_GUARD::S(G)
    • B(j);S_CUTR(k)::S(G)
    • S(a);N_GUARD::R1(D),XP(c)
  • Tries
    • Try
      • R(D);N_PINP(c),P_PINP(g),XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(k);XR(D)::S(B)
        • P(e);XS(B)::B(E)
        • R(k);::S(B)
        • S(a);::S(B)
        • P(c);::B(E),XP(c)
      • Refutation
        • P(c);XR(D)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+S(B)
    • Vars
      • K(d);N_SPINP(c),S_FLIGHT::B(E)+R(D),DCHECK,XP(c)
      • S(i);XP(F)::QAB(H)+S(B),XS(i)
      • P(e);N_SPINP(c),OGATE,P_SPINP(e),XS(B)::QAB1(H),XP(e)
      • P(g);OGATEB::QAB(H)
      • R(k);N_GUARD::S(G)
      • S(a);N_GUARD::R1(D),XP(c)
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