MESON Chess Problem Database

Problem Display
PID: 44086 (8/1PNBp3/Q6K/n3N3/4kp2/1p3p1P/1B2pPrp/4n3 w - - 0 1)

Grunfeld, Max

Het Schaakleven, 1931

8/1PNBp3/Q6K/n3N3/4kp2/1p3p1P/1B2pPrp/4n3

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6+
      • 2.Qxg6#
    • 1...Sc2
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sc4
      • 2.Qxc4#
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sxb7
      • 2.Qc4#
      • 2.Qxb7#
      • 2.Qa4#
      • 2.Qc6#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Qd5#
        • 2.Qf5#
      • 1...Rg6+
        • 2.Qxg6#
      • 1...Rg5
        • 2.Qd5#
      • 1...Rxf2!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sd2#
      • 1...Rg6+
        • 2.Qxg6#
      • 1...Kd3
        • 2.Bf5#
      • 1...Rxf2
        • 2.Qg6#
      • 1...Sxc4
        • 2.Qxc4#
      • 1...e6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(c);CHECK,N_GUARD::QAB(E),XR(c)
    • S(a);N_GUARD::QAB1(E)
    • S(a);N_GUARD::QAB1(E),XS(a)
    • S(i);N_GUARD::QAB(E),XS(i)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);CHECK,N_GUARD::QAB(E),XR(c)
        • R(c);::QAB1(E)
      • Refutation
        • R(c);XP(B)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • R(c);CHECK,N_GUARD::QAB(E),XR(c)
      • K(g);S_FLIGHT::B(I)
      • R(c);N_GUARD,XP(B)::QAB(E)
      • S(i);OGATE,XS(D)::QAR2(E),XS(i)
      • P(j);N_GUARD::S(D)
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