MESON Chess Problem Database

Problem Display
PID: 136060 (1q2N3/3NQpr1/4n3/r2p2pn/3kb1R1/3P2bR/2PP4/2BK4 w - - 0 1)

Ancin, Andrej

3rd Prize, Kalocsa, 1974

1q2N3/3NQpr1/4n3/r2p2pn/3kb1R1/3P2bR/2PP4/2BK4

#2

10 + 11

14649 Andrej Ancin - Chess Compositions 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Bb2#
      • 2.Qb4#
    • 1...Qe5
      • 2.Bb2#
      • 2.Qb4#
    • 1...Qd6
      • 2.Bb2#
    • 1...Qa7
      • 2.Bb2#
      • 2.Qb4#
    • 1...Qb2
      • 2.Bxb2#
    • 1...Qb4
      • 2.Qxb4#
    • 1...Qa8
      • 2.Bb2#
      • 2.Qb4#
    • 1...Qd8
      • 2.Bb2#
      • 2.Qb4#
    • 1...Qxe8
      • 2.Bb2#
      • 2.Qb4#
    • 1...Be1
      • 2.c3#
    • 1...Bf2
      • 2.c3#
    • 1...Bh2
      • 2.c3#
    • 1...Bf4
      • 2.c3#
    • 1...Bh4
      • 2.c3#
    • 1...Be5
      • 2.c3#
    • 1...Bd6
      • 2.c3#
    • 1...Bc7
      • 2.c3#
  • Tries
    • 1.Qf6+?
      • 1...Qe5
        • 2.Bb2#
      • 1...Be5
        • 2.Qf2#
        • 2.c3#
      • 1...Sxf6!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf5#
      • 1...Qxd6
        • 2.Bb2#
      • 1...Bxd6
        • 2.c3#
      • 1...Bf4
        • 2.c3#
      • 1...Shf4
        • 2.Qf6#
      • 1...Sef4
        • 2.Qe5#
      • 1...f5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(k);N_GUARD::B(A)
    • Q(k);N_GUARD::B(A),XQ(k)
    • Q(k);N_GUARD::QAR2(I),XQ(k)
    • B(a);::P(C)
    • B(a);N_SPINB(c)::P(C)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • Q(k);P_SPINQ(k)::B(A)
      • Refutation
        • S(g);XQ(I)
  • Actual
    • S(J);
    • Threat
      • S(J)
    • Vars
      • Q(k);N_GUARD,XS(J)::B(A)
      • B(a);XS(J)::P(C)
      • B(a);N_SPINB(c)::P(C)
      • S(g);N_GUARD,N_SPINB(c),S_CUTB(a)::QAB(I)
      • S(h);N_SPINB(c),OGATE::QAB1(I)
      • P(i);::S(J),XP(i)
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