MESON Chess Problem Database

Problem Display
PID: 136142 (2b4r/Rq1kP3/p4PBp/2R1PK2/2P1rBQ1/3N4/8/8 w - - 0 1)

Ancin, Andrej

Gazeta Czestochowska, 1976

2b4r/Rq1kP3/p4PBp/2R1PK2/2P1rBQ1/3N4/8/8

#2

11 + 7

14649 Andrej Ancin - Chess Compositions 2008
15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa7
      • 2.Kxe4#
    • 1...Qc7
      • 2.Kxe4#
      • 2.Rcxc7#
      • 2.Raxc7#
    • 1...Rxc4
      • 2.e6#
    • 1...Rd4
      • 2.e6#
    • 1...Rxf4+
      • 2.Kxf4#
    • 1...Rxe5+
      • 2.Kxe5#
    • 1...Rh7
      • 2.e8Q#
  • Tries
    • 1.Be8+?
      • 1...Rxe8
        • 2.Kg6#
      • 1...Kxe8+!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qa4#
      • 1...Rxf4+
        • 2.Sxf4#
      • 1...Rxe5+
        • 2.Sxe5#
      • 1...Rxc4
        • 2.e6#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • Q(d);N_SPINQ(d),XR(J)::QAB(D)+K(G),XR(a)
    • R(a);N_GUARD,XP(B)::P(F)
    • R(a);N_GUARD::P(F)
    • R(a);CHECK,XB(C)::QAB(D)+K(G),XR(a)
    • R(a);CHECK,XP(F)::QAB(D)+K(G),XR(a)
    • R(g);N_GUARD::P=Q
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • R(g);SBLOCK,XB(I)::QAB(D)+K(G)
      • Refutation
        • K(e);CHECK,N_SPINQ(d),S_FLIGHT,XB(I)
  • Actual
    • Q(D);
    • Threat
      • QAB(D)
    • Vars
      • R(a);CHECK,XB(C)::QAR(D)+S(A),XR(a)
      • R(a);CHECK,XP(F)::QAR(D)+S(A),DCHECK,XR(a)
      • R(a);N_GUARD,XP(B)::P(F)
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