MESON Chess Problem Database

Problem Display
PID: 221712 (3K2B1/4R3/4N3/Np3p2/4kB2/3n1r2/Q2p4/1n6 w - - 0 1)

Grunfeld, Max

British Chess Magazine, 1928

3K2B1/4R3/4N3/Np3p2/4kB2/3n1r2/Q2p4/1n6

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Qc4#
  • Keys
    • 1.Sb3!
      • threat
        • 2.Qa8#
      • 1...Kd5
        • 2.Sed4#
      • 1...Rxf4
        • 2.Sg5#
      • 1...Sxf4
        • 2.Sec5#
      • 1...Sc1
        • 2.Sbc5#
      • 1...Se1
        • 2.Sbc5#
      • 1...Sb2
        • 2.Sbc5#
      • 1...Sf2
        • 2.Sbc5#
      • 1...Sb4
        • 2.Sbc5#
      • 1...Sc5
        • 2.Sbxc5#
      • 1...Se5
        • 2.Sbc5#
      • 1...Sa3
        • 2.Sxd2#
      • 1...Sc3
        • 2.Sxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 1
  • Sets
    • P(f);N_GUARD::QAR2(A)
  • Actual
    • S(C);
    • Threat
      • QAB(A)
    • Vars
      • K(e);S_FLIGHT::B(G)+S(D)
      • R(d);SBLOCK,XB(B)::R(E)+S(D),DCHECK
      • S(c);SBLOCK,XB(B)::R(E)+S(D),DCHECK
      • S(c);N_GUARD::S(C)
      • S(c);N_GUARD::S(C),XS(c)
      • S(a);N_GUARD::S(C),XP(b)
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