MESON Chess Problem Database

Problem Display
PID: 238288 (5q2/2pR4/B5r1/3Np2Q/1B6/1p2P3/1K2P3/3kN3 w - - 0 1)

Segers, Marcel

Shakhmaty v SSSR, 1934

5q2/2pR4/B5r1/3Np2Q/1B6/1p2P3/1K2P3/3kN3

#2

9 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qh6
      • 2.Sf6#
    • 1...Qf1
      • 2.Sf6#
    • 1...Qf2
      • 2.Sf6#
    • 1...Qf6
      • 2.Sxf6#
    • 1...Qb8
      • 2.Sf6#
    • 1...Qh8
      • 2.Sf6#
    • 1...Rg1
      • 2.Se7#
    • 1...Rg2
      • 2.Se7#
    • 1...Rg3
      • 2.Se7#
    • 1...Rg5
      • 2.Se7#
    • 1...Rg7
      • 2.Se7#
    • 1...Rg8
      • 2.Se7#
  • Tries
    • 1.Sg2?
      • threat
        • 2.Sc3#
      • 1...Rxg2
        • 2.Se7#
      • 1...Qd6
        • 2.Qh1#
      • 1...Rd6!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Sc3#
      • 1...Qd6
        • 2.Sg2#
      • 1...Qf1
        • 2.Sf6#
      • 1...Rg1
        • 2.Se7#
      • 1...Rd6
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(f);N_GUARD::R(I)+S(F)
    • Q(f);N_GUARD,P_PINP(C)::R(I)+S(F)
    • Q(f);N_GUARD::R(I)+S(F),XQ(f)
    • R(d);N_GUARD::R(I)+S(F)
    • R(d);N_GUARD,P_PINP(C)::R(I)+S(F)
  • Tries
    • Try
      • S(A);
      • Threat
        • R(I)+S(F),DCHECK
      • Vars
        • R(d);N_GUARD,P_PINP(C),XS(A)::R(I)+S(F)
        • Q(f);N_GUARD::QAR(G)
      • Refutation
        • R(d);
  • Actual
    • Q(G);
    • Threat
      • R(I)+S(F),DCHECK
    • Vars
      • Q(f);N_GUARD::QAR(G)+S(A)
      • Q(f);N_GUARD::R(I)+S(F)
      • R(d);N_GUARD::R(I)+S(F)
      • R(d);N_GUARD::QAR(G)+S(A)
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