MESON Chess Problem Database

Problem Display
PID: 135673 (N2kB2K/N2prPP1/3Rpn2/2n4Q/7B/8/8/5r2 w - - 0 1)

Ancin, Andrej

Praca, 1953

N2kB2K/N2prPP1/3Rpn2/2n4Q/7B/8/8/5r2

#2

9 + 7

14649 Andrej Ancin - Chess Compositions 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe8+
      • 2.fxe8Q#
      • 2.fxe8R#
    • 1...Sd3
      • 2.Qa5#
    • 1...Sce4
      • 2.Qa5#
    • 1...Sxe8
      • 2.fxe8Q#
      • 2.fxe8R#
  • Keys
    • 1.Bxd7!
      • threat
        • 2.Sc6#
      • 1...Re8+
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Rxd7
        • 2.f8Q#
      • 1...Scxd7
        • 2.Qa5#
      • 1...Sfxd7
        • 2.g8Q#
        • 2.g8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(f);CHECK,OGATE,P_SPINS(d),XB(H)::PXR(f)=Q
    • S(b);OGATE::QAB(B)
    • S(d);OGATE,P_SPINR(f),XB(H)::PXS(d)=Q
  • Actual
    • B(H);XP(e)
    • Threat
      • S(D)
    • Vars
      • R(f);CHECK,OGATE,P_SPINS(d)::PXR(f)=Q
      • R(f);N_GUARD,P_SPINR(f),P_SPINS(d),XB(H)::P=Q
      • S(b);OGATE,P_SPINS(b),XB(H)::QAB(B)
      • S(d);N_GUARD,P_SPINR(f),P_SPINS(d),XB(H)::P=Q
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