MESON Chess Problem Database

Problem Display
PID: 135674 (4K3/8/R2b2nR/3kpp2/1nr3N1/1B6/2P1N3/4Q3 w - - 0 1)

Ancin, Andrej

Praca, 1954

4K3/8/R2b2nR/3kpp2/1nr3N1/1B6/2P1N3/4Q3

#2

8 + 7

14649 Andrej Ancin - Chess Compositions 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qh1#
    • 1...Ke6
      • 2.Sf4#
    • 1...Bc5
      • 2.Sf6#
  • Tries
    • 1.Sc3+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Ke6
        • 2.Rxg6#
        • 2.Qxe5#
      • 1...Kc5!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxc4#
      • 1...Ke4
        • 2.Sf6#
      • 1...Kc5
        • 2.Qxc4#
      • 1...Ke6
        • 2.Qxe5#

This is a version of 159170

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINR(b),S_FLIGHT::QAB(A)
    • K(c);P_SPINB(f),P_SPINS(g),S_FLIGHT::S(C)
    • B(f);SBLOCK::S(E)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);N_SPINR(b),P-FLIGHT::QAB1(A)
      • Refutation
        • K(c);N_SPINR(b),P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XR(b)
    • Vars
      • K(c);N_SPINR(b),S_FLIGHT::S(E)
      • K(c);P-FLIGHT::QAR1(A),XR(b)
      • K(c);P_SPINB(f),P_SPINS(g),S_FLIGHT::QAR1(A),XP(d)
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