MESON Chess Problem Database

Problem Display
PID: 226645 (3q3b/Q2p4/n2R4/3N4/B1k2N1p/5P2/1Ppp3K/2nb4 w - - 0 1)

Challenger, Alfred Clement

British Chess Magazine, 1931

3q3b/Q2p4/n2R4/3N4/B1k2N1p/5P2/1Ppp3K/2nb4

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.b3#
    • 1...Se2
      • 2.b3#
    • 1...Sd3
      • 2.b3#
    • 1...Sb4
      • 2.Se3#
  • Tries
    • 1.Rc6+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...dxc6!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Se3#
      • 1...Be5+
        • 2.Sxe5#
      • 1...Kxd3
        • 2.Bb5#
      • 1...Bxb2
        • 2.Sxb2#
      • 1...Sxd3
        • 2.b3#
      • 1...Qb6
        • 2.Sxb6#
      • 1...Qg5
        • 2.Sb6#
      • 1...Qe7
        • 2.Sb6#
      • 1...Qe8
        • 2.Sb6#
      • 1...Bd4
        • 2.Qxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::P(A)
    • S(g);SBLOCK::S(F)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR1(H),XS(g)
      • Refutation
        • P(h);XR(G)
  • Actual
    • S(E);
    • Threat
      • S(F)
    • Vars
      • B(j);CHECK,N_GUARD::S(E),XB(j)
      • K(e);S_FLIGHT,XS(E)::B(D)
      • B(j);XP(A)::S(E),XB(j)
      • S(a);N_GUARD,SBLOCK,XS(E)::P(A)
      • Q(i);N_GUARD::S(F),XQ(i)
      • Q(i);N_GUARD::S(F)
      • B(j);SBLOCK::QAB(H),XS(g)
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