MESON Chess Problem Database

Problem Display
PID: 220404 (8/4N1K1/2p5/1nR1p1BN/3PkPn1/pB6/4PP2/4R1r1 w - - 0 1)

Schachter, N

Die Schwalbe, 1928

8/4N1K1/2p5/1nR1p1BN/3PkPn1/pB6/4PP2/4R1r1

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Rc4#
  • Tries
    • 1.Sg3+?
      • 1...Kxd4
        • 2.Rc4#
      • 1...Rxg3!
    • 1.Sf6+?
      • 1...Kxd4
        • 2.Rc4#
      • 1...Sxf6!
    • 1.Bd5+?
      • 1...Kxd4
        • 2.Rc4#
      • 1...cxd5!
    • 1.Rc4?
      • threat
        • 2.Bc2#
      • 1...Rg3
        • 2.Sxg3#
      • 1...Se3
        • 2.Sf6#
        • 2.f3#
      • 1...Sxf2!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Bc2#
      • 1...Kxf5
        • 2.e4#
      • 1...Sxf2
        • 2.Rxe5#
      • 1...Sxd4
        • 2.Sd6#
      • 1...exd4
        • 2.f3#
      • 1...Rg3
        • 2.Shxg3#
      • 1...Se3
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(c);OGATEB,P-FLIGHT,XP(E)::R1(G)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(E)::R1(G)
      • Refutation
        • R(a);XS(I)
    • Try
      • S(I);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(E)::R1(G)
      • Refutation
        • S(d);P_PINB(H),XS(I)
    • Try
      • B(D);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(E)::R1(G)
      • Refutation
        • P(g);XB(D)
    • Try
      • R(G);
      • Threat
        • B(D)
      • Vars
        • R(a);N_GUARD::S(I),XR(a)
      • Refutation
        • S(d);P_PINB(H),XP(C)
  • Actual
    • S(J);
    • Threat
      • B(D)
    • Vars
      • K(c);OGATE,P_SPINP(f),S_FLIGHT,XS(J)::P(B)
      • S(d);N_GUARD,P_PINB(H),XP(C)::R1(G),XP(f)
      • S(e);N_GUARD,SBLOCK,XP(E)::S(J)
      • P(f);XP(E)::P(C)
      • R(a);N_GUARD::S(I),XR(a)
      • S(d);N_GUARD,P_PINB(H)::R1(G),XP(f)
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