MESON Chess Problem Database

Problem Display
PID: 231300 (8/5K2/3pNPB1/3nk2p/7r/8/4P3/b2Q4 w - - 0 1)

van Dijk, Johannes

Der Tijd, 1927

8/5K2/3pNPB1/3nk2p/7r/8/4P3/b2Q4

#2

6 + 6

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qxa1+?
      • 1...Rd4
        • 2.Qxd4#
      • 1...Sc3!
  • Keys
    • 1.e4!
      • threat
        • 2.Qxd5#
      • 1...Rxe4
        • 2.Qxh5#
      • 1...Sxf6
        • 2.Qxa1#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sc3
        • 2.Qd4#
      • 1...Se3
        • 2.Qxa1#
      • 1...Sb4
        • 2.Qxa1#
      • 1...Sf4
        • 2.Qxa1#
      • 1...Sb6
        • 2.Qxa1#
      • 1...Sc7
        • 2.Qxa1#
      • 1...Se7
        • 2.Qxa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK,XB(a)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(A),XR(b)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • P(B);
    • Threat
      • QAR1(A),XS(c)
    • Vars
      • R(b);N_GUARD,XP(B)::QAR(A),XP(e)
      • S(c);N_GUARD,XP(D)::QAB(A),XB(a)
      • B(a);N_GUARD::QAB1(A),XB(a)
      • S(c);S_CUTB(a)::QAB1(A)
      • S(c);N_GUARD::QAB(A),XB(a)
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