MESON Chess Problem Database

Problem Display
PID: 158777 (8/8/N1ppp3/8/3k1B2/r2P4/p2Q2K1/N7 w - - 0 1)

Grunfeld, Max

6th Prize, British Chess Magazine 13. Ty., 1906-1907

8/8/N1ppp3/8/3k1B2/r2P4/p2Q2K1/N7

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Sc2#
  • Tries
    • 1.Sb3+?
      • 1...Kd5
        • 2.Sb4#
        • 2.Sc7#
      • 1...Rxb3!
    • 1.Qe3+?
      • 1...Kd5
        • 2.Sb4#
        • 2.Sc7#
        • 2.Qe4#
      • 1...Kc3!
    • 1.Qb4+?
      • 1...Kd5
        • 2.Sc7#
        • 2.Qxd6#
        • 2.Qc4#
        • 2.Qe4#
      • 1...Kxd3!
  • Keys
    • 1.Sc7!
      • 1...Kc5
        • 2.Be3#
      • 1...Rxd3
        • 2.Qb4#
      • 1...Rb3
        • 2.Sxb3#
      • 1...Rc3
        • 2.Qe3#
      • 1...Ra4
        • 2.Sb3#
      • 1...Ra5
        • 2.Sb3#
      • 1...Ra6
        • 2.Sb3#
      • 1...Ra7
        • 2.Sb3#
      • 1...Ra8
        • 2.Sb3#
      • 1...c5
        • 2.Sc2#
      • 1...d5
        • 2.Sxe6#
      • 1...e5
        • 2.Be3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • P(e);SBLOCK::S(A)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • R(b);XS(A)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(c);P-FLIGHT,XP(D)
  • Actual
    • S(F);
    • Vars
      • K(c);S_FLIGHT::B(E)
      • R(b);P_SPINR(b),SBLOCK,XP(D)::QAR2(B)
      • R(b);N_GUARD::S(A),XR(b)
      • R(b);SBLOCK::QAB1(B)
      • R(b);N_GUARD::S(A)
      • P(d);SBLOCK::S(A)
      • P(e);SBLOCK::S(F),XP(f)
      • P(f);SBLOCK::B(E)
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