MESON Chess Problem Database

Problem Display
PID: 135752 (7R/5bN1/2q5/3Rn2N/p3B1kp/2p3r1/2K2p1Q/2B5 w - - 0 1)

Ancin, Andrej

Die Schwalbe, 1964

7R/5bN1/2q5/3Rn2N/p3B1kp/2p3r1/2K2p1Q/2B5

#2

8 + 9

14649 Andrej Ancin - Chess Compositions 2008
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Sf6#
    • 1...Qxd5
      • 2.Sf6#
    • 1...Qb7
      • 2.Sf6#
    • 1...Qd7
      • 2.Sf6#
    • 1...Qa8
      • 2.Sf6#
    • 1...Qe8
      • 2.Sf6#
    • 1...Qc4
      • 2.Sf6#
    • 1...Qc5
      • 2.Sf6#
    • 1...Qf6
      • 2.Sxf6#
    • 1...Qc7
      • 2.Sf6#
    • 1...Qc8
      • 2.Sf6#
    • 1...Rg2
      • 2.Qxg2#
    • 1...Rh3
      • 2.Qf4#
    • 1...Be6
      • 2.Sf6#
    • 1...Sd3
      • 2.Rg5#
    • 1...Sf3
      • 2.Bf5#
    • 1...Sc4
      • 2.Rg5#
    • 1...Sg6
      • 2.Rg5#
    • 1...Sd7
      • 2.Rg5#
    • 1...h3
      • 2.Qxg3#
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qxh4#
      • 1...Qf6
        • 2.Sxf6#
      • 1...Rh3
        • 2.Qf4#
      • 1...Sf3
        • 2.Se3#
      • 1...Sg6
        • 2.Sh6#
      • 1...h3
        • 2.Qxg3#

This anticipates 1008(1996)

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 15
  • Sets
    • Q(h);N_GUARD::S(F)
    • Q(h);N_GUARD,XR(E)::S(F)
    • Q(h);N_GUARD::S(F),XQ(h)
    • R(c);OGATEB::QAR2(C),XR(c)
    • R(c);OGATE,SBLOCK::QAR1(C)
    • B(i);S_CUTQ(h)::S(F)
    • S(g);OGATE::R1(E)
    • S(g);SBLOCK::B(D)
    • P(f);N_GUARD::QAR1(C),XR(c)
  • Actual
    • S(G);
    • Threat
      • QAR1(C),XP(f)
    • Vars
      • Q(h);N_GUARD::S(F),XQ(h)
      • R(c);OGATE,SBLOCK::QAR1(C)
      • S(g);S_CUTR(c)::S(G)
      • S(g);S_CUTQ(h)::S(G)
      • P(f);N_GUARD::QAR1(C),XR(c)
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