MESON Chess Problem Database

Problem Display
PID: 6725 (1B2Q3/1pR1N1K1/4k3/4n1Pb/q3n2r/1P5r/B3N3/3R4 w - - 0 1)

Mari, Alberto

Die Schwalbe, 1933

1B2Q3/1pR1N1K1/4k3/4n1Pb/q3n2r/1P5r/B3N3/3R4

#2

10 + 8

14744 Nuova Antologia dei Problemisti Italiani 1992
3713 Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Sxf4#
    • 1...Bg4
      • 2.Sf4#
  • Tries
    • 1.Sd4+?
      • 1...Kd6
        • 2.Rcc1#
        • 2.Rc2#
        • 2.Rc3#
        • 2.Rc4#
        • 2.Rc6#
        • 2.Rc8#
      • 1...Qxd4!
    • 1.Rd6+?
      • 1...Kxd6
        • 2.Rc6#
      • 1...Sxd6!
    • 1.Rc6+?
      • 1...Qxc6
        • 2.Sd4#
      • 1...Sd6
        • 2.Rdxd6#
        • 2.Rcxd6#
      • 1...Sxc6
        • 2.Qd7#
      • 1...bxc6!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Rxe5#
      • 1...Sxc5
        • 2.Rd6#
      • 1...Qb5
        • 2.Sd4#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Qa5
        • 2.Sd4#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Sd3
        • 2.bxa4#
      • 1...Sf3
        • 2.bxa4#
      • 1...Sc4
        • 2.Sd4#
      • 1...Sg4
        • 2.Sf4#
      • 1...Sc6
        • 2.Qd7#
      • 1...Sg6
        • 2.Qf7#
      • 1...Sd7
        • 2.Sg6#
      • 1...Sf7
        • 2.Sc6#

Anticipated by 21856(1921)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 2
  • Sets
    • R(d);N_GUARD::S(C),XR(d)
    • B(f);S_CUTR(d)::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • Q(b);XS(C)
    • Try
      • R(A);CHECK
      • Vars
        • K(g);P-FLIGHT,XR(A)::B(I)+R(F),DCHECK
      • Refutation
        • S(c);XR(A)
    • Try
      • R(F);CHECK
      • Vars
        • Q(b);XR(F)::S(C)
        • S(e);XR(F)::QAB1(J)
      • Refutation
        • P(h);XR(F)
  • Actual
    • R(F);
    • Threat
      • R1(F),XS(e)
    • Vars
      • S(c);N_GUARD,XR(F)::R1(A)
      • Q(b);N_GUARD::S(C)
      • Q(b);N_GUARD::S(C),XQ(b)
      • S(c);N_GUARD::R1(A),XS(c)
      • S(e);N_GUARD,S_CUTR(a)::B(B)+P(D),XQ(b)
      • S(e);S_CUTQ(b)::S(C)
      • S(e);S_CUTR(d)::S(C)
      • S(e);N_GUARD,S_CUTQ(b)::QAB1(J)
      • S(e);N_GUARD,S_CUTB(f)::QAB1(J)
      • S(e);S_CUTQ(b)::QAR(J)+S(G)
      • S(e);S_CUTB(f)::QAR(J)+S(G)
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