MESON Chess Problem Database

Problem Display
PID: 136058 (4Q1K1/4N1BB/N2k4/q1rP4/2p5/4n3/8/8 w - - 0 1)

Ancin, Andrej

Murarasu, Ion

Pedagogusok Lapja, 1974

4Q1K1/4N1BB/N2k4/q1rP4/2p5/4n3/8/8

#2

7 + 5

14649 Andrej Ancin - Chess Compositions 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qd8#
    • 1...Qd2
      • 2.Qd8#
    • 1...Qc3
      • 2.Qd8#
    • 1...Qb4
      • 2.Qd8#
    • 1...Qd8
      • 2.Qxd8#
    • 1...Qa1
      • 2.Qd8#
    • 1...Qa2
      • 2.Qd8#
    • 1...Qa3
      • 2.Qd8#
    • 1...Qxa6
      • 2.Qd8#
    • 1...Rxd5
      • 2.Sc8#
    • 1...Sxd5
      • 2.Sf5#
  • Tries
    • 1.Sf5+?
      • 1...Sxf5
        • 2.Qe6#
      • 1...Kxd5!
    • 1.Sc8+?
      • 1...Kxd5
        • 2.Be4#
        • 2.Qd7#
        • 2.Qe4#
      • 1...Rxc8!
    • 1.Qc6+?
      • 1...Kxe7
        • 2.Bf6#
      • 1...Rxc6!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qe6#
      • 1...Kxd5
        • 2.Qd7#
      • 1...Qxa6
        • 2.Qd8#
      • 1...Rxd5
        • 2.Bf8#
      • 1...Sxd5
        • 2.Be5#
      • 1...Qd8
        • 2.Qxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD::QAR2(F)
    • Q(c);N_GUARD,P_PINQ(F)::QAR2(F),XQ(c)
    • Q(c);N_GUARD,XS(B)::QAR2(F)
    • R(d);N_GUARD,SBLOCK,XP(A)::S(C)
    • S(a);N_GUARD,SBLOCK,XP(A)::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(a);XS(C)::QAR1(F)
      • Refutation
        • K(e);P-FLIGHT,XP(A)
    • Try
      • S(C);CHECK
      • Refutation
        • R(d);P_PINQ(F),XS(C)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(C)::B(D)
      • Refutation
        • R(d);XQ(F)
  • Actual
    • S(C);
    • Threat
      • QAR1(F)
    • Vars
      • K(e);P-FLIGHT,XP(A)::QAR2(F)
      • Q(c);N_GUARD,XS(B)::QAR2(F)
      • R(d);SBLOCK,XP(A)::B(D)
      • S(a);SBLOCK,XP(A)::B(D)
      • Q(c);N_GUARD,P_PINQ(F)::QAR2(F),XQ(c)
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