MESON Chess Problem Database

Problem Display
PID: 135742 (4r2b/1nQ5/8/3P1RNK/3k4/3N3R/brP1Bp2/3n4 w - - 0 1)

Ancin, Andrej

To Mat, 1963

4r2b/1nQ5/8/3P1RNK/3k4/3N3R/brP1Bp2/3n4

#2

9 + 8

14649 Andrej Ancin - Chess Compositions 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.c3#
    • 1...Sa5
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sd6
      • 2.Qc5#
    • 1...Sd8
      • 2.Qc5#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Rd3#
      • 1...Rb3
        • 2.Qc4#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Se3
        • 2.c3#
      • 1...Sc5
        • 2.Sc6#
      • 1...Re3!
    • 1.Sf3+?
      • 1...Ke4
        • 2.Qf4#
      • 1...Ke3!
    • 1.Se6+?
      • 1...Ke4
        • 2.Qf4#
      • 1...Rxe6!
    • 1.Rh4+?
      • 1...Re4
        • 2.Rxe4#
      • 1...Ke3!
  • Keys
    • 1.Se5!
      • threat
        • 2.Rd3#
      • 1...Kxd5
        • 2.Rd3#
      • 1...Rb3
        • 2.Qc4#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Se3
        • 2.Sef3#
      • 1...Sc5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::P(A)
    • S(f);N_GUARD::QAB1(I)
    • S(f);N_GUARD::QAB1(I),XS(f)
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(D)
      • Vars
        • R(c);S_CUTB(b)::QAR1(I)
        • B(b);N_GUARD::QAR1(I),XB(b)
        • S(a);N_GUARD::P(A)
        • S(f);SBLOCK::S(C)
      • Refutation
        • R(g);
    • Try
      • S(G);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(I)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(I)
      • Refutation
        • R(g);XS(G)
    • Try
      • R(D);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::R1(D),XR(g)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • R1(D)
    • Vars
      • K(e);P-FLIGHT,XP(E)::R(D)
      • R(c);S_CUTB(b)::QAR1(I)
      • B(b);N_GUARD::QAR1(I),XB(b)
      • S(a);SBLOCK::S(C)
      • S(f);SBLOCK::S(C)
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